True , This is the concept of axonal action potential propagation! Positive charges accumulate on subsequent regions of the membrane as a result of depolarization caused by an initiated action potential on one segment of the axon.
This local depolarization can cause an action potential to move along the axon by causing depolarization along the neighboring segment of the membrane.
Voltage-gated sodium channels open and close in milliseconds. As the cell membrane depolarizes, sodium channels open, allowing sodium ions to enter and further depolarize the membrane. This inward current causes the action potential to rise.
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Which of the following is the correct order of the structures through which light passes after entering the eye?
A)
lens, pupil, cornea, retina
B)
pupil, cornea, lens, retina
C)
pupil, lens, cornea, retina
D)
cornea, pupil, lens, retina
The following is the correct order of the structures through which light passes after entering the eye : Cornea, pupil, lens, vitreous humour retina
Light travels like this:
1) Enters the cornea, which bends light. 2) Light passes freely through the pupil of the iris. 3) Light passes through the vitreous. 4) The retina captures light rays and processes them into impulses.
Some of this light enters the eye through an opening called the pupil. The iris (the colored part of the eye) controls the amount of light accepted by the pupil. The light then passes through the lens (the transparent part of the eye). The lens works with the cornea to correctly focus light onto the retina.
The eight structures in the eye that light passes through before hitting the photoreceptors are the cornea, aqueous humor, lens, vitreous humor, ganglion cell layer, inner reticular layer, inner nuclear layer, and outer reticular layer. .
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How does the entire nervous system allow our bodies to interact with our world? Your response must include the following terms:
peripheral nervous system
central nervous system
sensory neurons
motor neurons
Thank you
Answer:
The nervous system takes in information through our senses, processes the information and triggers reactions, such as making your muscles move or causing you to feel pain. For example, if you touch a hot plate, you reflexively pull back your hand and your nerves simultaneously send pain signals to your brain.
Explanation:
Answer:
I found that on the web hope it helps
Explanation:
"The central nervous system includes the brain and spinal cord, while the peripheral nervous system includes all of the nerves that branch out from the brain and spinal cord and extend to other parts of the body including muscles and organs. Each part of the system plays a vital role in how information is communicated throughout the body."
During one night in 1995, a 1600-foot section of Sleeping Dunes National Lakeshore beach collapsed and landed in Lake Michigan. The missing sand created a steep 100-foot drop straight into Lake Michigan.
What caused the disappearance of the beach and the creation of the 100-ft drop into Lake Michigan?
A.
a landslide
B.
glacier movement
C.
deposition
D.
weathering
Landslides are the displacement of material from higher to lower regions due to the action of different factors. A) a landslide caused the disappearance of the beach and the creation of the 100-ft drop into Lake Michigan.
What is a landslide?A landslide can be defined as a massive movement of materials that include rocks, soil, plants, debris, and other elements composing the ground.
Mass of material moves from high altitude to low altitude due to the action of gravity and the influence of other factors as humidity excess.
These movements occur because the material is exposed to external forces (gravity) that supersede the strength of these materials producing slope breaks.
Other factors such as rains, increase in water level, snowmelt, erosion, earthquakes, human activities, and others influence the landslide occurrence.
The correct option is A) a landslide caused the disappearance of the beach and the creation of the 100-ft drop into Lake Michigan.
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help me please for biology and NOOO LINKSSS
Answer:
Commensalism
Explanation:
A commensalistic relationship is one in which one organism benefits and the other organism is unaffected, meaning it is neither harmed nor benefitted. The classic example of commensalism is that of sharks and remoras. Remoras are scavenging fish that cruise around with sharks.
hope this helped:)
Under which of the following conditions will the lac operon be expressed at the highest level? a. Glucose and lactose present b. Glucose present, lactose absent c. Glucose absent, lactose present d. Glucose and lactose absent
Two requirements must be satisfied for the lac operon to express at high levels: There must be no glucose.
What does a high glucose level mean?Because the body doesn't produce enough insulin, hypoglycemia (high blood glucose) occurs because there is too much sugar inside the blood. Vomiting, increased appetite and thirst, a rapid heartbeat, problems with vision, and other symptoms are signs of hyperglycemia, a diabetic symptom. Serious health issues might result from untreated hyperglycemia.
What is a healthy blood sugar level?Sugar levels around 140 ppm (7.8 mold/L) are considered normal. After two hours, a result of greater above 200 mg/dL (11.1 meq) indicates diabetes. You have prediabetes if your blood sugar level is between 140 or 199 mg/dL (7.8 molar ratio and 11.0 mmol/L).
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I need help with this science question. Thank you!
Answer:
a. 25 N ---> Direction: Right
b. 40 N ---> Direction: Right
c. 10 N ---> Direction: Right
d. 90 N <--- Direction: Left
e. 40 N down Direction: Down
Hope this helps!
You’ve learned about the laws of thermodynamics. using examples, explain why the first and second laws are significant for living organisms.
The first law of thermodynamics in living things. The sun provides the energy for photosynthesis. Plant leaves have cells that take in light energy and transform it into chemical energy.
The second law states that when everything goes from order to disorder, entropy increases. Living organisms die when there is a systemic imbalance.
Glucose, which is needed to create the complex carbohydrates required to increase plant bulk, serves as a reservoir for the chemical energy.
The second law of thermodynamics has two statements: Clausius's claim A system that operates in a cycle and transfers heat from a low-temperature reservoir (or object) to a high-temperature reservoir (or object) without causing any outside influences or interacting with the environment is not conceivable to build.
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where in the cell, are the ribosomes?
Answer:
Explanation:
Ribosomes are found 'free' in the cell cytoplasm and also attached to rough endoplasmic reticulum. Ribosomes receive information from the cell nucleus and construction materials from the cytoplasm.
Answer:
the part that I circled in blue is where ribosomes are in a cell
What enzyme makes mRNA?
Answer:
RNA polymerase II
Explanation:
A local town has a problem with too many mice running around. In response to this they start a war on the mice, and get neighboring communities to join them. As a result, all of the mice for 40 square miles are wiped out. The town's people are very happy, hypothesize what kind of impact you think this may have on the ecosystem in this area.
Answer:
See the answer below
Explanation:
The impacts of wiping out the mice can be classified into two - positive or negative.
The positive impact resulting from wiping out the mice would be felt in terms of reduced destruction to properties, transmission of pathogens, and constituting a nuisance to the environment.
The negative impact, however, will largely be felt on the existing food chains in the community. Organisms that serve as food for the mice will experience a boost in their population as a result of reduced predation while organisms whose source of food depends on the mice will see a decline in their own population as a result of inadequate food. This might create a chain reaction that may lead to a major disruption to the food chains and the overall functioning of the ecosystem.
Indicate whether the glven act would create water retention or water loss In the body.
Dry mouth ~ Increased osmolarity of blood aldostorenone hyposecretion ~ Decreased renal tubular reabsorption of water Renin release ~ Hyponatremia
Increased blood pressure ~ Ingestion of water
ADH hypersecretion ~ Hyperkalemia
Increased water permeability of the DCT and collecting ducts of the kidneys ~ Hemorrhage
Exercise in a warm climate
ADH and testosterone increase the risk of heart and volume as the water is absorbed into the bloodstream into to the capillaries, bringing the blood salt concentration back to normal.
What does the renin enzyme do in response to a lower ph quilt in the kidney?An enzyme known as renin is released by kidney cells in response to low blood pressure. The kidneys reabsorb salt due to renin. Water retention is a constant side effect of sodium reabsorption. Blood pressure and volume are restored as a result.
Which hormone promotes water retention while guarding against dehydration?A deficiency of renin - angiotensin system (ADH), also known as prolactin, usually prevents hydration, or the kidneys and liver inability to react to ADH, are the two main causes of diabetes insipidus. The kidneys may hold onto the body's fluids thanks to ADH. The steroid.
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Which of the following is an example of chemical reaction
Answer:
A chemical reaction happens when one or more chemicals are changed into one or more other chemicals. Examples: iron and oxygen combining to make rust. vinegar and baking soda combining to make sodium acetate, carbon dioxide and water.
Explanation:
Hope this helps
I need help with the 2nd problem, the graph in the top is the info you need to know about it.
Answer:
Cell C is the white blood cell
white blood cells need a lot of Mitochondria because since they hunt down pathogens in your bloodstream, they will need a lot of energy.
C goes into the last blank
Explanation:
Which of the following describes a parasite? (I know it’s between B or D but I’m not sure which one, also, please don’t put links!!)
A) A fish that is killed and eaten.
B) A worm that lives inside a bear.
C) A bear that kills and eats fish.
D) A bear that has worms in its gut.
Answer:
B) A worm that lives inside a bear.
Explanation:
A parasite is a living organism that lives inside or outside of another organism called a HOST in order to obtain nourishment from such organism. A parasite that lives inside its host is called ENDOPARASITE while a parasite that lives outside its host is called ECTOPARASITE.
In this question, a worm that lives inside a bear is a PARASITE because it is living inside the bear, which is the host in order to obtain nourishments. Note that, the answer is not option D because the bear is a HOST not a parasite.
What is the chance in percentage (%) that the child being homozygous for the trait?
A homozygous recessive (AA) kid has a 25% chance of being unaffected, a heterozygous (Aa) carrier child has a 50% probability, and a homozygous homozygous (AA) child has a 25% chance.
A genetic disorder or characteristic can be transferred from parent to kid via autosomal dominant inheritance. The genetic disease can be brought on by one copy of a mutant (changed) gene from one parent. A mutant gene-carrying parent has a 50% chance of passing it on to their kids.
Four of the 16 potential gamete pairings from a SsYy x SsYy cross are viable. When the genes (also known as alleles) that regulate how a feature develops are paired in exactly the same ways, the trait is said to be homozygous. Being heterozygous for a trait means having several alleles for that trait. A homozygous characteristic will always show itself in the same way.
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How are proteases activated in the stomach and small intestine?
The proteases are activated by the pH that changes in the stomach and small intestine.
Proteases are the proteins that have the ability to cleave the peptide bonds present in the proteins. The proteases are very important part of the digestive system as they are major forces that make protein digestible and amenable to assimilation. The protease are secreted with the digestive enzymes the are produced in the stomach and small intestine predominantly. The proteases are produced in the inactive form so that they cannot digest the cell that are producing them. In order to become active they need special condition such as pH for their activation.
So, pH is the major activating condition for the proteases, in addition to it there are special protein that act on inactivated protease to make them active.
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Select the misplaced or dangling modifier.
The future of coral reefs concerns many marine biologists; as a source of diverse fish
species, our dependence upon coral reefs for food and for marine biodiversity cannot
be overstated.
The misplaced or dangling modifier in this sentence is "The future of coral reefs concerns many marine biologists."
What is a misplaced or dangling modifier?A phrase or clause that is not obviously or logically related to the word or words it modifies. Usually at the start of a sentence, fixed by rewriting it. A misplaced modifier is a word, phrase, or clause that is separated incorrectly from the word it modifies or describes.
A dangling modifier is usually attached to the incorrect subject or has no subject to modify at all. Dangling modifiers are generally corrected by introducing the subject immediately after the modifier or including it in the modifying phrase, in this case, "The future of coral reefs concerns many marine biologists" is placed after "as a source of diverse fish species."
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Which of these statements is true?
c. The best fossils are formed during a cataclysmic event.
a. Younger strata are usually nearer the surface.
d. Rock strata are formed by volcanic activity.
e. Water’s ability to erode rock helps to explain how fossils are formed.
b. More recent fossils are in the deepest
'Younger strata are usually nearer the surface' is the true statement.
What do you mean by Strata?
Strata is a term that refers to the various layers of a rock formation. The term is used in a variety of fields, including geology, archaeology, and petrology. It describes the various layers of sedimentary rock that have been formed over time, as well as the different types of sedimentary rock that can be found in a strata.
This statement is true because younger strata (layers of rock or sediment) are generally deposited more recently and are therefore closer to the surface than older strata. This is because over time, as the Earth's surface erodes and is reshaped by various natural forces, the most recently deposited layers tend to be more exposed.
Hence, Option B is correct.
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Correct form of question:
Which of these statements is true?
a. The best fossils are formed during a cataclysmic event.
b. Younger strata are usually nearer the surface.
c. Rock strata are formed by volcanic activity.
d. Water’s ability to erode rock helps to explain how fossils are formed.
e. More recent fossils are in the deepest.
Changing the temperature or pH can change an enzyme's shape. Explain how changing the temperature or pH might affect the function of an enzyme.
Answer:
Temperature: Raising temperature generally speeds up a reaction, and lowering temperature slows down a reaction. However, extreme high temperatures can cause an enzyme to lose its shape (denature) and stop working. pH: Each enzyme has an optimum pH range. Changing the pH outside of this range will slow enzyme activity.
electron microscope magnify up to __________
Answer:
between 1 and 50 million times
Explanation:
A light microscope can magnify things up to 2000x, but an electron microscope can magnify between 1 and 50 million times depending on which type you use! To see the results, look at the image below.
Rex rabbits have short fur and Angora rabbits have long fur. When mated together these rabbits produce offspring with medium length fur.
On a sheet of paper, make a Punnett square showing a cross that could result in the birth of short fur, long fur and medium fur babies.
What would be the parent genotypes that could result in short fur, long fur, and medium fur babies?
The offspring of an Angora and Rex rabbit hybrid have fur that is significantly longer than that of a Rex rabbit. There is a 0.25 percent probability that the child will have long fur based on the genotype of the parents.
The length of the offspring's' fur indicates an imperfect dominant inheritance pattern. Incomplete dominance is an inheritance pattern in which the phenotype of the offspring closely matches that of one parent more than the other, but is intermediate between the phenotypes of the parents.
In this instance, the progeny have fur length that is roughly equivalent to that of an Angora rabbit but slightly longer than that of a Rex rabbit. This is an illustration of partial dominance.
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Is a snail considered an animal or an insect?
Snail is considered as an animal as insects strictly belong to the pylum Arthropoda.
Snails are the animals of the phylum Mollusca. They belong to the class Gastropoda and are recognized by the presence of the spiral shaped shell on the upper side of the body. Snails can be present on land or even in water. It moves y the help of a single muscle like foot.
Arthropoda is the largest phylum of the Animal kingdom that possesses the invertebrate organisms. The characteristic features of the organisms of this phylum is presence of exoskeleton, segments in the body and paired appendages. The organisms of Arthropoda are referred to as insects.
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What are the 5 chromosome mutations?
The 5 chromosome mutations are given as , duplication, deletions, insertions , inversions, translocation.
1. Duplication: The multiple copies of a chromosome that occur during the duplication process.
2. Deletions - When a nucleotide is removed, the mRNA codons change (the nitrogen bases of a DNA). This will change the makeup of amino acids.
3. Insertions – An insertion is the addition of a new nucleotide.
4. Chromosomal inversions happen when a chromosome fragment breaks off and reattaches in the opposite direction to the same spot.
5. Translocation: This is the splitting in half and moving of two chromosomes.
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The Law of Conservation of Energy states that energy is never created or destroyed but only changed from one form to another. Based on the equation of photosynthesis, where do you hypothesize the energy from the Sun is now stored?
Because sunlight energy is required for the conversion of carbon dioxide and water into glucose and oxygen during photosynthesis, the rule of conservation of energy is related to this process.
What is the Law of Conservation of Energy?The term "conservation" refers to a physical quantity or parameter's entire value (such as energy, mass, linear or angular momentum).
Therefore, every new glucose molecule contains a small amount of the energy the sun provides. In the presence of sunshine, a series of chemical reactions called photosynthesis transforms carbon dioxide and water into glucose and oxygen.
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On what date is the North Pole getting 24 hours of daylight?
Answer:
December 21st
Explanation:
Midsummers' Day :)
Answer:
The 21st of December
Explanation:
I know this cause we learned about it in class
In the space provided below (1) illustrate, (2) label, and (3) describe
each of the stages of the water cycle (listed above). Use arrows to indicate the
direction of water movement. Page 13 of your Earth Science text book details
the events of the water cycle. You may choose to select and use an image of the
water cycle that you copy from an online resource, however, to receive full credit
you must label and define each process and add directional arrows if they are not
provided
Answer:
Explanation:
TRY TO USE THIS
Which of the following statements correctly describes a portion of the pine life cycle? a. Apollen tube slowly digests its way through the triploid endosperm. b. Seeds are produced in pollen-producing cones.
c. Pollen grains contain female gametophytes. d. Female gametophytes produce eggs.
pollen grains accurately summarizes a stage of the pine life cycle in which the apollen tube slowly helps in digestion its way through into the triploid endosperm.
Are male gametes present in pollen grains?Pollen grains are created by an anther and contain male gametes. In a procedure termed as fertilization, the male gamete and female gamete combine to create a zygote, which eventually develops into a new seed.
Are male gametes and pollen grains similar?So the pollen is a male gametophyte that is either immature or partially formed. Similar to this, a unicellular microspore generates male gametes and undergoes mitotic cell division to become a mature microgametophyte. As a result, the pollen grains contain immature and made significant contributions male gametophytes.
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look carefully at the diagram. state why process 2 is necessary in sexual reproduction
The process 2 is necessary in the sexual reproduction. This process is known as fertilization. This involves the fusion of both the gametes to result in the formation of a diploid zygote.
What is Fertilization?Fertilization can be defined as the union or fusion of two different gametes which include male and female gametes. During the process of fertilization, haploid sperm and egg cells fuse to form a diploid zygote for the initiation of the prenatal development. In mammals, the process of fertilization involves multiple ordered steps, such as the acrosome reaction, zona pellucida penetration, sperm and egg attachment, and the membrane fusion.
In case of normal reproduction, fertilization combines two haploid meiotic nuclei or gametes of the sperm and egg cells, and also ensures a high efficiency of the normal development and the genetic diversity in the progeny produced.
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1. A square mile of tropical rainforest contains 36 mammal species. A square mile of tundra contains 4 mammal species.
What characteristic of ecosystems is being described above?
producers
abiotic factors
succession
biodiversity
2. Which of the following is most likely to decrease biodiversity?
Protecting more land from future housing developments
Reintroducing natural predators to an area
Clearing a forest to raise livestock for a nearby town
Adding native plants to a suburban garden
3. In the Kelp forest ecosystem, sea urchins eat kelp, and sea otters eat sea urchins.
What is the role of sea urchins in this ecosystem?
primary consumers
secondary consumers
primary producers
producers
4. What is the correct order of energy flow in an ecosystem?
sun → grass → rabbit
sun → rabbit → grass
fox → rabbit → grass
sun → fox → rabbit
Answer:
Explanation:
A square mile of tropical rainforest contains 36 mammal species. A square mile of tundra contains 4 mammal species.
What characteristic of ecosystems is being described above?
producers
abiotic factors
succession
biodiversity
2. Which of the following is most likely to decrease biodiversity?
Protecting more land from future housing developments
Reintroducing natural predators to an area
Clearing a forest to raise livestock for a nearby town
Adding native plants to a suburban garden
3. In the Kelp forest ecosystem, sea urchins eat kelp, and sea otters eat sea urchins.
What is the role of sea urchins in this ecosystem?
primary consumers
secondary consumers
primary producers
producers
4. What is the correct order of energy flow in an ecosystem?
sun → grass → rabbit
sun → rabbit → grass
fox → rabbit → grass
sun → fox → rabbit
Which is true about fossils and rocks found in the same layer(strata)?
A.) They are made of the same minerals.
B.) They have the same color and texture.
C.) They are relatively the same age.
D.) None of the above.
Answer:
B.) They have the same color and texture.