Question

1- During infancy, development of muscular coordination and strength generally occurs from the head to the “tail,” or from the top to the bottom. This is called:

proximodistal principle

differentiation

proportional development

cephalocaudal principle

2-

Most human neurons have two structures that are for sending and receiving messages. These are called:

synapses and myelin.

dendrites and synapses.

dendrites and axons.

synapses and axons. 3- Myelination is the process by which the dendrites and axons are created. the synapses send messages to the neurons. the nerve cells become covered with smooth sheaths of fatty proteins that protect, insulate, and nourish them. the neurons are spread throughout the brain to create its structure. 4- One of the primary functions of myelin is to: provide an electrical conductor in the synapse. help the neuron reproduce over the lifetime. slow down and concentrate the flow of energy within a neuron. speed up the flow of information within a neuron.

Answer 1

1. Proximodistal develpoment is the development of general fuctions to develop before the fine motor skills develop for example the walking is first seen in a child than the child being able to hold a pencil correctly. Therefore this is not the right answer

Differentiation is the process of when a skill in a child get more sophisticated and improves for example from the child being able to walk he can now run or even skip. Therefore this is not the right answer

Proportional development is when there is all around develpment that occurs gradually but its not the sense that happens in a toddler or infant but happens throughout ones life span.

The correct answer is cephalocaudal principle where there is motor and physical development in a toddler right through childhood where there is head to toe progress.

2. The neurons have the function of sending and receiving information which are the

the dendrites which are responsible for receiving the information

the synapses which are responsible for sending the inforamtion from one cell to the other.

the axons function is to transmit or send information to different neurons

the myelin sheath is to increase the speed at which the inforamtion is passed.

Therefore the correct answer is the dendrites and the axons

3. Myelination is the process of forming a sheath around neurons so that the inforamtion is passed faster from one place to the other. Therefore the 3rd anser is correct which is the nerve cells vecome covered with smooth sheaths of fatty proteins taht protect, insulate andnourish them.

4. As mentioned earlier the primary function of the myelin is to speed up the flow of the information within the neuron which is the last option.