Deck 9: Autonomic Nervous System

Question 1

Areas of the central nervous system (CNS)that modulate autonomic control include which one of the following?

A)Thalamus
B)Hypothalamus
C)Limbic system
D)Both A and B
E)A,B,and C

Answer 1

E
Explanation: The hypothalamus,thalamus,and limbic system modulate brainstem autonomic control.

Question 2

Capacitance vessels include which of the following?

A)Skeletal muscle veins and venules
B)Arterioles in the skin
C)Arterioles in the CNS
D)Skeletal muscle arteries and arterioles
E)Arteries in the abdomen

Answer 2

A
Explanation: Skeletal muscle veins and venules are called capacitance vessels because blood pools in these vessels when their walls are relaxed.

Question 3

Where are the cell bodies of the sympathetic preganglionic neurons located?

A)Autonomic nuclei of the brainstem
B)Lateral horn of spinal cord T1-L2 levels
C)Lateral horn of spinal cord S2-S4 levels
D)Ganglia adjacent to the spinal cord
E)Ganglia near the thoracic cavity

Answer 3

B
Explanation: Cell bodies of the sympathetic preganglionic neurons are located in the lateral horn of the spinal cord gray matter from the T1 to L2 levels.

Question 4

During acute appendicitis,the contribution of the somatosensory nociceptive afferents is which of the following?

A)Regulation of visceral function
B)Production of skeletal muscle guarding to protect the appendix
C)Modulation of respiratory function
D)Signaling visceral distress to the brain
E)Signaling conscious awareness of pain in the umbilical region

Question 5

Which one of the following is NOT a characteristic of the autonomic efferent system?

A)Innervates blood vessels in skeletal muscle.
B)Hormones regulate effector control.
C)Is usually a two-neuron pathway with a synapse outside the CNS.
D)Activation of effectors is usually voluntary.
E)Neurotransmitters are used for signaling.

Question 6

Autonomic regulation of the heart is dependent on which one of the following?

A)Parasympathetic fibers of the vagus nerve
B)Sympathetic fibers from the thoracic level
C)Periaqueductal gray
D)Both A and B
E)A,B,and C

Question 7

Sympathetic activation does NOT produce which of the following?

A)Increased blood flow to active muscles
B)Increased blood glucose levels
C)Increased digestive activity
D)Dilation of bronchioles
E)Increased heart rate

Question 8

Which of the following signs occurs in Horner's syndrome?

A)Drooping of the upper eyelid
B)Constriction of the pupil of the eye
C)Vasodilation of skin,with an absence of sweating on the ipsilateral side of the face and neck
D)Both A and B
E)A,B,and C

Question 9

Drugs that block beta-1 (β1)receptors are used to treat which one of the following?

A)Asthma
B)Excess sweating
C)Metabolic disorders
D)Tachycardia
E)Vagus nerve disorders

Question 10

Which of the following is NOT a cause of syncope?

A)Insufficient cardiac output
B)Hypoxia
C)Hyperglycemia
D)Strong emotions
E)Hypoglycemia