Answer: The sodium/potassium (Na+/K+) pump introduces two potassium ions that were outside and expels three sodium ions that were inside the neuron. After that, the sodium ions cannot re-enter the neuron, because the membrane is not permeable to it. This means 3 positive charges are lost every time the pump works and this makes that in the outside there are more positive loads that in the interior, creating a difference of potential. When the nervous impulse reaches a neuron in a state of rest, the membrane is depolarized, and this opens the channels for sodium, thereby the polarity is inverted. At the end, the neuron must return to the initial rest potential and the membrane is repolarized, closing the channels for sodium.
Explanation:
A neuron is a type of cell found in the central nervous system that is able to receive, process, decode and send information in the form of electrical or chemical signals through the process of synapses. This allows the transmition of information to other cells in the form of nerve impulses, which translates into "instructions" for the rest of the organism. So during the synapse, this process can be of two types:
Chemical synapse: neurons release and receive neurotransmitters, which are small molecules that carry information.Electrical synapse: it is faster and bidirectional, characterized by the transmission of ions between neurons through protein connections, called gap joints or cleft joints, without the intervention of a neurotransmitter.The information between neurons is transmitted by changes in the polarity of the cell membranes, due to the presence of neurotransmitters that alter this ionic concentration inside the cell. So they are responsible for depolarizing the membrane of the neuron that receives the nerve impulse, opening the channels for sodium that remained closed before. The difference in ion concentration produces a difference in the potential between the exterior of the membrane and the interior of the cell, and it is achieved by the action of the sodium/potassium (Na+/K+) pump which introduces two potassium ions that were outside and expels three sodium ions that were inside the neuron. After that, the sodium ions cannot re-enter the neuron, because the membrane is not permeable to it. This means 3 positive charges are lost every time the pump works and this makes that in the outside there are more positive loads that in the interior, creating a difference of potential. It is said that the neuron is in rest potential, ready to receive a nervous impulse.
When the nervous impulse reaches a neuron which is in a state of rest, its membrane is depolarized, and this opens the channels for sodium, thereby the polarity is inverted. After this, the interior of the neuron reaches an electropositive value, with respect to the exterior. Initally, the value is about -70 millivolts (negative the interior with respect to the outside). When there is a change of potential of 120 millivolts more than the interior, the action potential has been reached and there is a transmission of the nervous impulse to the next neuron.
At the end, the neuron must return to the initial rest potential and the membrane is repolarized, closing the channels for sodium. Enzymes destroy neurotransmitters and the rest potential is reached when the sodium is expelled by the Na+/K+ pump.
Please HELP ! :(
3.4.4 Why are cells so small?
1. Write a brief summary of the main steps you took in the procedure. Be sure to describe any adjustments you made to the procedure and why you made them.
Cells are small because they can absorb nutrients much more efficiently. Because they are smaller they can efficiently absorb enough food. ... When a cell doubles in size the volume increases much more then the surface area, which is why large cells cannot receive enough food efficiently for their volume.
Hope this helps!
What comes first in the process of cell division?
A. Chromatids line up in the center of the cell
B. Chromatids are pulled apart
C. Chromatids are duplicated
D. Cell splits in two
Answer:
C) Chromatids are duplicated
Explanation:
A is during Metaphase
B is during Anaphase
C is during S Phase (The pre-phase is you will)
D is during Telophase
would an electron have to absorb or release energy to jump from the second energy level to the third energy level
Answer:
IT HAS TO RELEASE ENERGY
Explanation:
Which two characteristics are shared by all thunderstorms, tornados, and huricanes?
O clouds and wind
O eyes and clouds
O warm, dry air and wind
O large waves and warm, dry air
The two characteristics that are shared by all thunderstorms, tornadoes, and hurricanes are: clouds and wind. The correct option is A.
What are the characteristics of thunderstorms, tornados, and hurricanes?Thunderstorms, tornadoes, and hurricanes are all types of severe weather conditions. They are called severe weather conditions because they can cause a lot of damage to property and people's lives. They are all characterized by strong winds and clouds.
Thunderstorms are storms that have thunder and lightning. They are caused by warm air that rises and cools, creating thunderstorm clouds. They are usually accompanied by heavy rain, gusty winds, and lightning.
Tornadoes, on the other hand, are funnel-shaped clouds that touch the ground. They are usually created by thunderstorms. They are characterized by strong, rotating winds that can cause a lot of damage to structures and vegetation.
Hurricanes are large, tropical cyclones that have low-pressure centers. They are usually formed over warm ocean waters and are accompanied by strong winds, heavy rain, and flooding. They can cause a lot of damage to coastal regions and people's lives.
Therefore, the correct option is A.
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what cell components are responsible for detoxifying the cell
RER
SER
ATP
DAF
(Anatomy and physiology)
Answer:
SER
Explanation:
Smooth Endoplasmic Reticulum
These are fat-based molecules that are important in energy storage, membrane structure, and communication (steroids can act as hormones). The smooth endoplasmic reticulum is also responsible for detoxifying the cell.
why are important to use unites measurement that are the same for everyone?
Answer:
Everyone in some field of study uses SI, or uses USCS, and the units are obvious. ... The measurement only makes sense when the standard unit being compared is noted. CALCULATING. As important as it is to note units when measuring, it is ten times as crucial to use units in calculating.
Explanation:
Hope it helps :)
Answer:
Everyone in some field of study uses SI, or uses USCS, and the units are obvious.The measurement only makes sense when the standard unit being compared is noted. As important as it is to note units when measuring, it is ten times as crucial to use units in calculating.
Hope this helps:) Happy New Year!
All agents of weathering can be divided into which two main groups?
A.
physical and biological
B.
energy and matter
C.
mechanical and chemical
D.
wind and water
Answer:
C.
Explanation:
Mechanical and Chemical
Name three fluids that are essential to life. Cite evidence from this section to justify your answer.
Answer:
water:to stay alive
semen:to reproduce
sweat:without we would get heat strokes easier
Answer:
Blood, Saliva, Bile
Explanation:
blood, which functions to transport oxygen to cells, carry metabolic waste products such as carbon dioxide away from cells and transport infection-fighting white blood cells, glucose, hormones and other essential substances throughout the body. Blood also contains cell fragments called platelets and clotting factors that help to seal leaks that may develop in blood vessels.
Saliva is secreted by salivary glands in and around the mouth saliva contains antibacterial enzymes and antibodies, as well as mucus itself. Saliva helps to moisten food, which is important to lubricate chewing and swallowing. It also enhances taste, because if the chemicals in food were not in a liquid medium, they could not be detected by taste receptors.
Bile is a brown to dark green fluid that is produced by the liver, stored in the gallbladder (a synonym for bile is gall), and released into the intestines when we eat. It is partly responsible for the color of vomitus and stool. Its most important ingredient is bile salts, which function like soap to break down dietary fats, enabling them and fat-soluble vitamins such as A, D and E to be absorbed. They also help to prevent the cholesterol-containing bile in the gallbladder from forming gallstones.
HURRY HELP !!
TOPEX/Poseidon:
was a joint effort between the U.S. and France
tracked changes in the height of the sea level
helped meteorologists predict the path of La Niña
all of the above
Answer: All of the Above
Explanation:
TOPEX/ Poseidon was a joint effort between the USA's NASA and France's CNES from 1992 to 2006 that used satellite technology to study the changes in the ocean's topography and height.
It was hailed for its wide success as it was able to find data to explain various phenomenon that scientists had been trying to explain for a while including how to predict the path of La Nina.
Answer:
all of the above
Explanation:
I got it right on my lesson:)
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What factors cause the breakdown of rocks into soil that can support life?
Answer:
Temperature of the surrounding.
Describe the path of a nitrogen atom through four parts of the nitrogen cycle. Be sure to explain the processes involved in the transfers. Note when a form of nitrogen is available to plants.
Answer:
Explanation:
Nitrogen cycle consists of four main steps namely:
Nitrogen Fixation.
Ammonification/ Decay.
Nitrification.
De-nitrification.
What are three things that affect an enzymes activity
Answer:
oofooooooofofofo29u4844
Answer:
Factor 1: Concentration of Enzyme
Factor 2: Concentration of Substrate
Factor 3: Effect of Temperature
What is the shape of a DNA molecule? Why is your model not 100% accurate as to the
'shape
Answer:
What is the shape of a DNA molecule?
The shape is like a twisted ladder
Why is your model not 100% accurate as to the 'shape?'
No two Dna molecules are the same.
I hope this helps!
6. Name the two hormones that the thyroid gland produces once it is stimulated by
TSH
Two hormones produced by thyroid gland are triiodothyronine and thyroxine.
Write characterize progression of infectious disease.
Answer:
* Infectious disease management depends on precise portrayal of disease progression so transmission can be forestalled. Gradually progressing infectious diseases can be hard to characterize because of a latency period between the time an individual is infected and when they show clinical signs of disease.
* Defining directions through sickness states from infection to clinical illness can assist researchers with creating control programs dependent on focusing on individual infection state, possibly decreasing both progression and creating misfortunes because of the illness.
Explanation:
Gradually progressing infectious diseases are hard to characterize in light of the fact that they are frequently connected with an inactivity period between the time an individual is infected and when they give clinical indications or side effects of illness.
To successfully control infectious diseases, it is paramount to see how the disease progresses.
Which of the following is an example of diffusion? a. rain falling from the sky. b. water freezing into ice. c. sugar dissolving in a glass of water. d. a stone sinking to the bottom of a lake.
Answer:
C is the answer
Explanation:
Answer:
c
Explanation:
it spreads out into the water
A scientist wants to make a geologic column of rock layers from different parts of a state. Which claim explains how the scientist will do this?
A. The scientist will organize the layers by comparing the fossils and types of rocks.
B. The scientist will measure the exact ages of the rocks found in each part of the state.
C. The scientists will look at the surface features in each area to organize the layers.
D.The scientist will select one area in the state and use only those layers to construct the geologic column.
Answer:
A. The scientist will organize the layers by comparing the fossils and types of rocks.
Explanation:
A geologic column can be defined as a collection of rock layers that are typically grouped based on their relative ages in a descending order i.e from oldest to the youngest.
Generally, the layers of the rock that are found in various parts of the world are known to be different because they all comprises of distinct Earth's geological history.
In this scenario, a scientist wants to make a geologic column of rock layers from different parts of a state. Thus, the claim which best explains how the scientist will do this is that, the scientist will organize the layers by comparing the fossils and types of rocks.
Hence, the scientist will collect or gather the fossils obtained from various rocks located in different parts of the state and make a comparison.
Which of the following is the correcto definitivo of eléctricas energy?
Answer:
Electrical energy is energy derived from electric potential energy or kinetic energy. ... Thus, all electrical energy is potential energy before it is delivered to the end-use. Once converted from potential energy, electrical energy can always be called another type of energy (heat, light, motion, etc.).
When early embryo are releasing chemicals to nearby cells to elicit protein production in the activated neighboring cells. What is the primary function of the signaling molecule?
a. facilitating cell death
b. initiating gene translation
c. regulating gene expression
d. stimulating cell division
Answer:
c. regulating gene expression
Explanation:
During development, early embryo cells release different ligand molecules that bind to specific receptors on the surface of nearby cells, thereby triggering signaling pathways involved in cell differentiation and development. These signaling events have been associated with the activation of transcription factors located in the cytoplasm which are then translocated into the nucleus where they activate the transcription of target genes. For example, sonic hedgehog (SHH) is a peptide hormone that plays roles during animal development. SHH is secreted by epithelial cells to activate transcription factors in nearby cells involved in several developmental processes.
How does a cell's external environment affect the movement of water across the cell membrane?
Answer:
water molecules move according to the energy from where they are to where they're going.
Explanation:
The external environment of the cell significantly affects the movement of water across the cell membrane when a cell is placed in three types of solution.
What is a cell membrane?A cell membrane may be defined as a type of biological membrane that significantly separates and protects the interior environment of all cells with respect to the outside environment. It is semi-permeable in nature which regulates the transport of materials entering and exiting the cell.
If a cell is placed in a hypertonic solution, water will migrate out of the cell, and the cell will shrink. In an isotonic environment, there is no net water movement, so there is no change in the size of the cell. When a cell is placed in a hypotonic environment, water will enter the cell, and the cell will swell.
Therefore, the external environment of the cell significantly affects the movement of water across the cell membrane when a cell is placed in three types of solution.
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Which hazard is generally not associated with a
volcanic eruption? *
A.Lava flow
B. Lahar
C. Ash
D. Sinkhole
Answer: D D D D D D D D D
Explanation:
Allowing clients to view their pets during (. )
isn't considered standard of care.
Answer: Surgical procedures
Explanation:
Clients should not be allowed to view their pets during surgical procedures because they may reacting a negative way to seeing their pets being operated on.
It is therefore not considered a standard of care for this to happen and is the reason clients should not see what happened to their pets whilst they were being operated upon.
The gravitational pull of the moon is much less than the gravitational pull of earth
with two statements are true for an object with the mass of 20 kilograms the weigh 44 pounds on earth?
A. The objects mass would be the same o the moon.
B. The objects mass would be less on the moon.
C. The objects weight would be the same on the moon.
D. The objects weight would be less on the moon.
Answer:
The object's weight would be less on the moon.
The Object's mass would be the same on the moon
please help
What is the cell cycle?
1.process of duplication of genetic material
2.repeating process of DNAsynthesis
3.the time a cell spends actively dividing
4.repeating series of stages a dividing cell goes through
Answer:
A cell cycle is a series of events that takes place in a cell as it grows and divides.
brainliest will be given
A type O woman marries a man with type B blood, given that both of their mothers were type O, predict their possible offspring.
Answer:
For a woman with type O blood and a man with type B blood, whose mother was of type O blood, the possible offspring will consist of B and O children.
Explanation:
Blood type is an inherited trait and is determined by the presence or absence of antigens A and B on the surface of the erythrocyte:
Blood type A contains the antigen A and its genotype can be A|A or A|O. Blood type B contains the antigen B, whose genotype may be B|B or B|O. Blood type AB contains both antigens and a single genotype expression A|B. Blood type O lacks surface antigens, with a unique O|O genotype.In the above case, the woman has an O blood type, whose genotype is O|O. The male must be heterozygous, since his mother was of blood type O, so his genotype is B|O.
♂ B|O ♀ O|OTo know the possible descendants of this couple, the crossing of the wolf alleles must be done:
Alleles B O
O B|O O|O
O B|O O|O
From where the probabilities of the offspring are obtained:
Individuals with blood type B and genotype B|O 50% Individuals with blood type O and genotype O|O 50%Therefore, from this crossing only descendants of individuals with blood type B and O can be obtained.
A strand of DNA was unwound and analyzed. If the nitrogen bases of the strand were A-T-C-G-G-A, what was the sequence of nitrogen bases on the other strand? Explain.
Answer:
U-A-G-C-C-U because the other strand is always the opposite so if it's G then it will be C and that goes backwards too and for T it's A but u can't put T on the other strand so u substitute it for U
and sorry the explanation is not perfect :)
Why might farmers and herders have selectively bred their animals and plants?
Answer:
Farmers and herders can derive a surplus of animals and plants with desireable traits. (ex: larger crops, bigger animals, sweeter fruits etc.)
Explanation:
By selectively breeding animals (breeding those with desirable traits), farmers increased the size and productivity of their livestock. Same thing goes for plants. Farmers can selectively breed them so they can become more favorable for their consumers.
Hope that helps!
the life cycle after birth follows...?
During photosynthesis, specific pigments absorb light energy, which is then used to fuel the building of sugar molecules. Which colors correspond to the wavelengths of light that are strongly absorbed by each pigment
Answer:
Chlorophyll a- violet blue
Chlorophyll b - orange red
Carotenoids- green yellow
Explanation:
The three major plant pigments are chlorophyll a, chlorophyll b and carotenoids.
Various pigments are identified by their specific pattern of wavelength absorption in the spectrum of visible light. Chlorophyll a absorbs light in the violet-blue region, while chlorophyll b absorbs orange-red light. Chlorophyll a and b reflects or transmits green light hence they appear green. Carotenoids absorb light in the green - yellow region hence they reflect longer yellow, red, and orange light.