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kiruha [24]
3 years ago
14

Myelination is the covering of axons with myelin. over middle childhood, many neurons are myelinated. this has what effect on ne

ural processing
Biology
1 answer:
pochemuha3 years ago
3 0
<span>Myelination enhances the speed of action potential propagation.
The difference between myelinated and unmyelinated axons are in the propagation of action potential. In unmyelinated axons, the action potential travels continuously through the axons. On the other hand, among the myelinated nerve fibres, transmembrane currents can only occur at the nodes of Ranvier where the axonal membrane is exposed, so the excitation of the axonal membrane jumps from node to node. This propagation is called saltatory conduction and this movement of depolarization wave is much faster than in unmyelinated fibres.</span>
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Genetics and inheritance are controlled by the laws of _________. Each parent has ________ alleles for each trait. You have a __
amid [387]

Answer:

1. Segregation, one, 50%.

2. Punnett Square, A Punnett square allows the prediction of the percentages of phenotypes in the offspring of a cross from known genotypes (shows the probability of an offspring with a given genotype resulting from a cross), It does not show actual offspring.

Explanation:

Punnett Square, this gives you the total number of predicted offspring.

If my answer is perfect considered as brilliant

Best wishes

4 0
2 years ago
Which of the following statements correctly describes some aspect of ATP hydrolysis being used to drive the active transport of
saw5 [17]

Answer:

B) This is an example of energy coupling

Explanation:

Energy coupling is a process by which cells carry out thermodynamically unfavorable, endergonic (energy-requiring) reactions to other exergonic (reactions that liberate free energy) reactions.

Reactions which are endergonic do not occur spontaneously as they result in a decrease in entropy and a positive free energy change, ∆G.

Exergonic reactions occur spontaneously as they result in an increase in entropy and have a negative free energy change, ∆G.

For example, the active transport of ions against their concentration gradients in cells is a non-spontaneous endergonic process which is coupled to the hydrolysis of ATP, an exergonic process in other for the reaction to proceed. ATP hydrolysis phosphorylates an amino acid side chain in the transport protein which then drives the forward process of transport of the ion.

Considering the above,

Option A: The hydrolysis of ATP is endergonic, and the active transport is exergonic is false because ATP hydrolysis is exergonic while active transport is endergonic.

Option B: This is an example of energy coupling is true.

Option C: Both ATP hydrolysis and active transport are spontaneous because they result in an increase in entropy of the system is false because only ATP hydrolysis is spontaneous

Option D: Neither ATP hydrolysis nor active transport is spontaneous is false because ATP hydrolysis is spontaneous.

Option E: ATP is acting as a transport protein to facilitate the movement of the ion across the plasma membrane is false because ATP is not a protein, rather it serves to activate the transport protein by phosphorylating it.

8 0
3 years ago
A cell can only grow so large in size, because
sweet-ann [11.9K]
<span>A cell can only grow so large in size because its ability to exchange materials is affected by a growing surface-to-volume ratio. Nature designed cells to be small in size because of the network of membranes passing through it. If cells grow any bigger, membranes in it will not be able to pass through its different parts and perform their purpose.


A cell is a network composed of many organelles (e.g. mitochondria, nucleus), that communicate and work together to provide bodily functions. The cell is small so that communication between organelles will be faster and much easier. When cells are small they can be easily repaired when damaged and replicated when needed.</span>
6 0
3 years ago
Read 2 more answers
Nutrients move through ecosystems in different way. which nutrient cycles through organisms,rivers,
Vlad1618 [11]
Water cycles through organisms and rivers.
3 0
3 years ago
In an eight-cell embryo of an organism, the cells of the upper tier are aligned over the cells of the lower tier at a slight ang
irakobra [83]
<span>I think the correct answer among the choices listed above is option C. The organism described most likely is a starfish. This is because annelids and mollusks exhibit spiral holoblastic cleavage while the echinoderms have radial holoblastic cleavage.</span>
7 0
3 years ago
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