XII Bio Nervous Coordination

Which of the following is not caused by the activation of the sympathetic nervous system?

• An increase Ca²⁺ release in cardiomyocytes.

• An increase in cardiac output.

• An increase in blood pressure.

• A decrease in heart rate.

Peripheral nervous system consists of

Which of the following is the part of central nervous system?

• Brain

• somatic nervous system

• spinal cord

• both A and C

How do neurons communicate with one another?

• chemically

• electrically

• through radio waves like impulses

• through A and B

The following reflexes are all autonomic Except:

• Salivary secretion.

• the action of urination

• Flexion of the arm following a painful stimulus.

• Acceleration of the heart.

The system that controls smooth muscle, cardiac muscle, and gland activity is the:

• Somatic nervous system.

• Autonomic nervous system.

• Skeletal division.

• Sensory nervous system.

The sympathetic preganglionic neurons release….. at their

terminals, and the effect is always ……..:

• norepinephrine ; inhibitory

• norepinephrine ; excitatory

• acetylcholine ; excitatory

• acetylcholine ; inhibitory

The Schwann cells form a myelin sheath around the:

• cell body

• nucleus

• axon

• nodes of Ranvier

White matter refers to myelinated fibers in the:

• CNS

• PNS

• ANS

• SNS

Immediately after an action potential is propagated, which one of the following ions rapidly diffuses out of the cell into the tissue fluid:

• sodium

• chloride

• calcium

• potassium