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My name is Ann [436]
3 years ago
6

Myelin sheath consists of axon?

Biology
1 answer:
forsale [732]3 years ago
5 0
Rather, each myelin sheath insulates the axon over a single long section and, in general, each axon comprises multiple long myelinated sections separated from each other by short myelin sheath-gaps called nodes of Ranvier. ... In the CNS, axons carry electrical signals from one nerve cell body to another.
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Question 21<br> Neurons of the cerebral cortex never dip into the medulla.<br> O True<br> O False
V125BC [204]

Answer:

False

Explanation:

The cerebral cortex refers to the outer layer of the brain. This layer is formed by a thin film of nervous tissue that surrounds the surface of the cerebral hemispheres, with primates having a much more developed cerebral cortex than other animals.  

the cerebral cortex is a thin layer of neurons and neuronal connections which is embedded in the neocortex(the neuronal cells of the cerebral cortex which form in the deep layer), it is not homogeneous, since it is made up of six layers of cells, each with specific and specific functions.

5 0
3 years ago
What factors limited human population growth in the past?
lapo4ka [179]

Answer:

Limiting factors include a low food supply and lack of space. Limiting factors can lower birth rates, increase death rates, or lead to emigration. When organisms face limiting factors, they show logistic growth (S-shaped curve, curve B: Figure below).

Explanation:

3 0
3 years ago
Read 2 more answers
Put the following levels in order from simplest (1) to most complex (6).
Korvikt [17]

Answer:

cell, tissue,organ, organ system, organism

4 0
3 years ago
"the ________ is the deep groove that separates the brain into two halves."
yKpoI14uk [10]
The biggest part of our brain, the cerebrum is separated into two halves, the left and the right hemisphere by a deep groove that is called the l<span>ongitudinal fissure or</span> cerebral fissure. 
The hemispheres are connected by a bundle of nerve fibers called the corpus callosum in order to enable communication between the two of them, as their communication is necessary for various cognitive functions of the brain. 
7 0
3 years ago
Which of the following occurs during the light-dependent reactions of plants?
zubka84 [21]

Answer:

The correct answer will be option-D.

Explanation:

Photosynthesis proceeds in two stages: light-dependent and light-independent reaction.

The light-dependent begins when the chlorophyll pigment of the photosystem absorbs light energy.  This absorption causes the excitation of the electrons provided by the chlorophyll molecule.  

The excited electrons accepted by electron acceptor molecule from reaction center and a chain of electron flow begin called electron transport chain.

This transport of electrons creates a scarcity of electron in photosystem which causes splitting of the water molecule as a result of which oxygen gas is released.  

Thus, option-D is the correct answer.

3 0
3 years ago
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