Answer:
Neurons consist of a cell body, axon and dendrites. Axon is the one that differentiates the length of the neuron. These neurons are tightly packed by the high fat content sheath called myelin sheath.
This protects the neuron from leaking the electrically charged atoms in the fluids that encase the nervous system. It is gradually developed as the age progresses.
The conception of the prenatal development is divided into three stages
1. The germinal stage
2. Embryonic stage
3. Fetal stage.
The myelination of different parts takes place in different stages of the conception. At birth the parts that are involved in sleeping, heartbeat and respiration are well myelinated than the other parts. So they are well functioned.
Hence the option (c) is not correct.
Later the myelination of the parts that involves the stereotyped reflexes takes place. Otherwise the physical activities will be affected.
Hence the option (d) is not correct.
The sensory functions like touch, see, and hear myelination begins at the six month of pregnancy means embryonic stage but they are less myelinated at the beginning. Later till the child attains of four years myelination continues and the connections between these areas of cortex thickens and function well.
Hence the correct option is
.
Answer:
Nature and nurture are the two things that are involved in the better brain development. The areas of the brain that control sensation and moment begin as a result of maturation. But physical and sensory stimulation also spurts.
Sensory stimulation sparks the cortex. This is proved by the experiment done on rats. Two sets of rats are taken into the experiment. Some rats are exposed to complex environment that involves the toys and ladders. And the control group is grown under the dark area.
The result is that the rats grown under complex environment have heavier brains than the control groups. The control groups have developed shrinkage visual cortex and impaired vision. This illustrates that if they are not used they are lost.
Thus adaptability allows us to develop more neural connections to different environments. So lack of sensory stimulation during critical periods can result in permanent sensory defects.
Hence the blank can be filled with
.
Answer:
Nature and nurture are the two things that are involved in the better brain development. The areas of the brain that control sensation and moment begin as a result of maturation. But physical and sensory stimulation also spurts.
Sensory stimulation sparks the cortex. This is proved by the experiment done on rats. Two sets of rats are taken into the experiment. Some rats are exposed to complex environment that involves the toys and ladders. And the control group is grown under the dark area.
The result is that the rats grown under complex environment have heavier brains than the control groups. The control groups have developed shrinkage visual cortex and impaired vision. This illustrates that if they are not used they are lost.
Hence the blank can be filled with the
.