Answer:
Efectivamente, una neurona puede ser a la vez presináptica y postsináptica y de hecho, esto es lo que sucede habitualmente en el Sistema Nervioso, formado por una intrincada red de neuronas que establecen multitud de contactos sinápticos entre sí y que a veces se consideran presinápticas, y otras, postsinápticas. Estos términos hacen referencia a la neurona que en un determinado momento envía la información (presináptica) y a la neuronas que la recibe o receptora (postsináptica). Si en una sinapsis química la neurona presináptica libera un neurotransmisor que se une a los receptores de la membrana postsináptica, se producirán cambios eléctricos en el potencial de membrana de la neurona receptora. Si la suma de todos estos cambios eléctricos (sumación espacial y temporal) supera el umbral de excitación de esa neurona postsináptica, se desencadenará un potencial de acción en su axón que se propagará a lo largo de él hasta llegar a los botones terminales, donde provocará de nuevo la liberación de un neurotransmisor. Así, la neurona postsináptica se convierte en presináptica enviando información a otras neuronas, que serán en este caso, neuronas postsinápticas.
Explanation:
The postsynaptic membrane depolarizes when Na+ reaches the postsynaptic cell. This depolarization induces an excitatory postsynaptic potential, which increases the likelihood of an action potential being triggered by the postsynaptic neuron (EPSP).The membrane potential can so surpass the barrier required to generate an action potential.
What postsynaptic neuron is stimulated to threshold?One postsynaptic potential's amplitude at the instant the next one starts will algebraically sum with it to create a bigger potential than the sum of the individual potentials. As a result, the membrane potential can cross the threshold necessary to produce an action potential.
Therefore, If a postsynaptic neuron is stimulated to threshold by spatial summation, this implies that (the postsynaptic cell has many synapses with many presynaptic neurons).
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what part of the nervous system performs information processing and integration?
Answer:
The central nervous system (CNS)
Explanation:
I'm pretty sure this is the right answer since it consists of the brain and spinal cord, and it is the integrating and control center of the nervous system. It interprets sensory input and dictates motor output based on reflexes, current conditions, and past experience. PLEASE CORRECT ME IF I AM WRONG!
PLEASE HELP! GIVING BRAINLIEST!
Answer:
Thermal energy is the energy that is contained and a part of heat.
Conduction is when heat or electricity moves through a solid object.
Radiation is energy that comes from a source and travels through space at the speed of light.
Convection is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity this causes a heat transfer.
What is the term used to describe any living thing?
Answer: The term used for living things is "Organism"! :)
What is the relationship between tissues and organs. A) organs are formed from tissues. B) tissues are formed from cells. C) organ system are formed from organs. D) none of the above.
Answer:
A
Explanation:
Organs are formed by tissues, tissues are formed by cells
the gestation of an embryo occurs in stages. which of the following is the correct order of the stage of gestation
which statement explains something that the fossil record indicates
a. earth is still a very young planet
b. mammals have always existed on earth
c. mass extinctions have occurred several times on earth
d. the amount of water on earth has decreased over time
PLSSSS HELPPP
The statement that explains something that the fossil record indicates is that mammals have always existed on earth. Check out more details about fossils below.
What are fossils?Fossils are any preserved evidence of ancient life, including shells, imprints, burrows, coprolites, and organically-produced chemicals.
Fossils indicate several things that has occured in the time past. For example, the fossil remains of a mammal can indicate that mammals existed at a particular time.
Therefore, the statement that explains something that the fossil record indicates is that mammals have always existed on earth.
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which graphic organizer best compares the energy inputs and outputs of cellular respiration and photosynthesis?
Answer:
glucose and oxygen is used for the input cellular respiration while carbon dioxide and water is used for output cellular respiration
Light energy → photosynthesis → chemical energy → cellular respiration → chemical energy is the best compares the energy inputs and outputs of cellular respiration and photosynthesis.
Thus option B is correct.
What do you mean by energy transfer ?In a living cell the energy can only transfers from one cellular reaction to another by changing its form from one type of energy to another.
photosynthesis and cellular respiration are two closely related opposite cellular reaction.
In photosynthesis light energy from sun can be absorbed by chlorophyll pigment, then conversion of inorganic matters to organic matter.
It stores energy in the form of chemical energy called glucose.
In cellular respiration, products of photosynthesis that is glucose and oxygen converted in the carbon dioxide and water with release of ATP stores a high amount of energy.
Thus option B is correct.
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The question was incomplete, thus the probable question is
which graphic organizer best compares the energy inputs and outputs of cellular respiration and photosynthesis?
A. chemical energy → cellular respiration → thermal energy → photosynthesis → light energy.
B. Light energy → photosynthesis → chemical energy → cellular respiration → chemical energy.
C. chemical energy → photosynthesis → thermal energy → cellular respiration → chemical energy.
D. light energy → cellular respiration → chemical energy → photosynthesis → thermal energy.
Which of the following is an incorrect description of oil and its impact on the environment.
Oil spills increase reproduction of algae species.
Oil coats sand and plants, making habitats unlivable.
Oil can go through biomagnification in the food chain.
Oil clogs the gills of fish and coats the feathers of birds.
Answer:
I believe it is there first answer.
Oil can go through biomagnification in the food chain is an incorrect description of oil and its impact on the environment. So, the correct option is (C).
What is Oil and its effects in the environment?The oil contains many different toxic compounds that can cause serious health problems such as heart damage, stunted growth, immune system effects and even death.
Oil and gas drilling has serious impacts on our wildlands and communities. Operating round-the-clock drilling projects is causing pollution, fueling climate change, disrupting wildlife and damaging public lands that were set aside for the benefit of all people.
Many other environmental impacts include the greenhouse effect, acid rain, poor water quality, groundwater contamination, among others, which may contribute to the loss of biodiversity as well as the destruction of ecosystems.
Thus, oil can go through biomagnification in the food chain is an incorrect description of oil and its impact on the environment. So, the correct option is (C).
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The passage of H ions through ____________ causes it to spin and produce ATP
Why do we close our eyes when exposed to bright light?
Answer:
he presence of rod cells and cone cells in the eyes.
Explanation:
1. When you cover the leaf in aluminum foil, what are you keeping from
the leaf?
oxygen
chlorophyll
sunlight
iodine
Answer:sunlight
Explanation:
Answer:
You are blocking it from sunlight
Explanation:
The leaf needs sunlight to carry out photosynthesis. it also stops it from inhaling carbon dioxide
the elongation of the leading strand during dna synthesis
Answer:
Depends on the action of DNA Polymerase
Explanation:
The ribosome continues to translate each codon in turn throughout the elongation phase. A bond known as a peptide bond is used to connect each relevant amino acid to the expanding chain. Up until all the codons are read, elongation continues.
What leading strand during DNA synthesis?The two strands that make up DNA are the leading, continuous strand, which moves toward the replication fork, and the trailing, discontinuous strand, which moves away from the replication fork.
A process known as elongation occurs when more nucleotides are inserted, lengthening the RNA strand. RNA polymerase “walks” along one strand of DNA, called the template strand, during elongation in the 3' to 5' direction.
Therefore, DNA polymerase III catalyses the elongation of DNA by attaching incoming DNA to the 3' end of the elongated DNA.
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PLEASE HELPPP!!!!
Identify a biome and explain how the biotic and abiotic factors affect the biodiversity in that Biome? How are the biotic and abiotic factors related?
Answer:
A large community of plants and animals in a major habitat, such as a desert or a forest. Abiotic factors, such as rain, temperature and sun affect the biome drastically. If there is more rain, there will likely be more plants and animals able to live in that area. If it is hotter and sunnier, less plants and animals will be able to live in the area. Biotic factors, such as beavers in a forest can also change the biodiversity of the area. Beavers create dams which slow the movement of water. This allows other animals that can't swim against strong currents to live in the ponds and lakes the beavers make. This would be impossible if the beavers weren't there.
50points!!!!! and brainlest if you get it correct!!!!!
Think of an organism you've heard of or read about that has a surprisingly unusual trait or
behavior. How is this trait or behavior different from similar organisms? How does it help the
organism survive in its environment?
Answer:
An axolotl has an astonishing ability to regenerate body organs and lost limbs up to 5 times. Normally other animals would die after losing limbs. If an axolotl gets attacked by a predator and loses its limbs, it can still survive.
Explanation:
Which molecule made during photosynthesis is the best source for carbon and hydrogen atoms used for cellular activities?
O carbon dioxide
O oxygen
O sugar
water
Answer:
carbon dioxide
Explanation:
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.
The figure below shows how enzymes work. In the space provided, describe what is occurring at each letter
True or false: An antibiotic is a substance produced by natural metabolic processes of some microorganisms.
Answer:
False.
Explanation:
"Antibiotics are drugs that kill harmful microorganisms. It attacks the normal functioning of the disease-causing."
Which of the following is not related to the cell cycle?Cell divisionCell divisionOrganism grothOrganism grothDNA replicationDNA replicationReproduction
Answer:
organism growth
Explanation:
because an organism starts to grow by using system and all and not only cells i guess
What is most likely to cause wilting in plants?
A: Low nutrient concentration in the soil near the roots
B: An increased amount of sunlight exposure
C: Loss of water in cells throughout the plant
D: Long exposure to cold external temperatures
Answer:
loss of water in cells throughout the plant
Explanation:
The cAMP receptor protein (CRP) is said to be responsible for positive regulation of the lac operon because ________.
The cAMP receptor protein (CRP) is responsible for the positive regulation of the lac operon because CRP binds to a specific DNA sequence close to the lac promoter, causing increased transcription.
The repressive effect of glucose is effected through a protein called catabolite activating protein (CRP) and cAMP.
The catabolite activating protein (CRP) is a dimer that, when it binds to cAMP, activates and stimulates the transcription of the lactose operon genes.The activator protein CRP-cAMP is necessary for the binding of RNA polymerase to the promoter of the lactose operon genes.Therefore, we can conclude that cAMP and its receptor protein and its binding to the promoter of the lac operon, causes a DNA twist that facilitates the binding of RNA polymerase to the promoter.
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Which statement describes the ability of the cell membrane to allow various substance to move through it?
Which gas began to increase in the atmosphere as a result of photosynthesis by autotrophic prokaryotes approximately 2.7 billion years ago
which disease occurs when the heart is unable to pump enough blood to supply the needs of the body?
Answer:
Heart failure
Which of the following correctly lists animals in order of increasing complexity?
A. Diploblast, triploblast with complete coelom, triploblast with incomplete coelom.
B. Triploblast with coelom, triploblast with no coelom, diploblast with coelom.
C. Diploblast, triploblast with incomplete coelom, triploblast with complete coelom.
D. Diploblast with coelom, triploblast, triploblast with coelom.
Diploblastic and triploblastic embryos.
During embryogenesis, diploblasts develop two embryonic germ layers: an ectoderm and an endoderm or mesendoderm. Triploblasts develop a third layer—the mesoderm—which arises from mesendoderm and resides between the endoderm and ectoderm.
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According to the model represented in the diagram, which of the following would cause the cell to not express the lacZ, lacY, and lacA sequences?
A. Binding the RNA polymerase to the gene
B. Removing the Inducer
C. Preventing the repressor from binding to the lac operon
Answer:
the answer would be a
Explanation:
When the inducer is removed from the lac operon model, then this will result in hindering the expression of lacZ, lacY, and lacA sequence in the cell. Thus, the correct option is B.
What is lac operon?Lac operon is a model which contains genes that are involved in metabolism of the cell. The genes are expressed only when the lactose is present in the medium and glucose is absent. The lac operon is turned on and off in response to the glucose and lactose levels in the medium: catabolite activator protein (CAP) and lac repressor. The lac repressor is responsible for blocking the transcription of the operon.
The lac operon can be switched off i.e., the expression of genes can be stopped by removing the inducer molecule from the medium.
Therefore, the correct option is B.
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which spinal nerve roots carry sensory nerve signals?
Answer:
Explanation:
I think the answer is posterior
What term is used to describe organisms that decompose organic remains from dead organisms as an energy source
Answer:
Decomposers are made up of the FBI (fungi, bacteria and invertebrates—worms and insects). They are all living things that get energy by eating dead animals and plants and breaking down wastes of other animals.
A growing community considers building a new hospital closer to residential neighborhoods. This will get residents to emergency care faster and save lives when it is needed. The only land available near residential areas is a forested wetland that supports a variety of species. What is a political consequence of not using the land for a new hospital?
Emergency care is farther away, risking the health and well-being of a growing community.
Preserving the ecosystem may upset residents in a community with a hospital shortage.
If there are fewer hospitals, it can slow down the number of new medical career opportunities.
It protects the lives of species and prevents a reduction in carbon sequestering by the trees.
A political consequence of not using the land for a new hospital is that preserving the ecosystem may upset residents in a community with a hospital shortage.
A very important consideration when citing infrastructure is the environmental impact of such projects. This is because, infrastructure is built on land at the expense of the ecosystems that survive in such habitat. Building the said hospital is going to have the negative impact of decrease in biodiversity.
A political consequence of not using the land for a new hospital is that preserving the ecosystem may upset residents in a community with a hospital shortage.
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Which car has the most momentum?
A. A 1,820 kg car that is traveling east at 30 m/s
B. A 730 kg car that is traveling north at 90 m/s
C. A 2,270 kg car that is stationary
D. A 1,460 kg car that is traveling south at 80 m/s
Answer:
The answer would be B because the light a object the more acceleration can accumulate
Explanation:
