Question

1-Which part of the neuron contains the nucleus?

A_Axon

B_Myelin sheath

C_Dendrite

D-Soma

2_The “pleasure center” which governs emotions, fear, and aggressions is called the

A_Limbic system

B_Frontal lobe

C_CNS

D_Parietal lobe

3-Which of the following is the proper order of the postsynaptic potentials?

A-Synthesis, release, binding, inactivation/removal, reuptake

B-Release, binding, reuptake, synthesis, inactivation/removal

C-Reuptake, binding, synthesis, release, inactivation/removal

D-Inactivation/removal, release, reuptake, binding, synthesis

4-The somatic nervous system involves _____ processes and the autonomic nervous system involves ______ processes.

Voluntary; involuntary

Involuntary; voluntary

5_Observable and measurable characteristics, like eye color or height, are examples of

A-Phenotypes

B-Genotypes

Answer 1

1 The correct answer is option D. The main portion of the cell is called the soma or cell body. It contains the nucleus, which in turn contains the genetic material in the form of chromosomes. Neurons have a large number of extensions called dendrites.

2. The correct answer is option A. The limbic system contains a structure known as the brain's pleasure center. It plays a role in sexual arousal and the "high" derived from certain recreational drugs.

3. The correct answer is option A. The sequence of postsynaptic potential is as follows:

• Sodium ions move into muscle cell
• Depolarization of the post-synaptic membrane
• Action potential is propagated over the muscle cell membrane.

4. The correct answer is option A. The somatic nervous system is responsible for movement of voluntary muscles and the process known as a reflex arc.

5. The correct answer is option A. A phenotypic trait is a distinct variant of a phenotypic characteristic of an organism