Autonomic Nervous System

What describes ANS?

Motor fibres that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle and glands

Which sympathetic fibers form the splanchnic nerve?

Those that pass through the trunk ganglion to synapse in collateral or prevertebral ganglia

The following effect is a characteristic of the parasympathetic nervous system:

Decreases heart rate

Erection of the penis or clitoris \________.

Is primarily under sympathetic control

A drug that might be used specifically to reduce heart rate in cardiac patients could be \________.

A beta-blocker

Over 90% of all parasympathetic fibers are derived from cranial nerve number \________.

X

The nervous system subdivision is a chain of two motor neurons consisting of a preganglionic and a postganglionic neuron:

Autonomic

Preparing the body for the "fight-or-flight" response is the role of the \________.

Sympathetic nervous system

Beta-blockers \________.

Decrease heart rate and blood pressure

Which following statement is not true?
A. Sympathetic has extensive branching of preganglionic fibers; parasympathetic has minimal branching of preganglionic fibers.
B. Sympathetic origin is craniosacral; parasympathetic is thoracolumbar.
C. Sympathetic division has short preganglionic and long postganglionic fibers; parasympathetic has long preganglionic and short postganglionic fibers.
D. Sympathetic ganglia are within a few centimeters of the CNS; parasympathetic are close to visceral organs served.

Sympathetic origin is craniosacral, parasympathetic is thoracolumbar

Sympathetic nerves may leave the spinal cord at which vertebra?

First thoracic

Which effector is NOT directly controlled by the autonomic nervous system:

Skeletal muscle

Which is a uniquely sympathetic function?

Regulation of body temperature

The somatic and autonomic nervous systems differ in all of the following except \________.

All of the neurotransmitters

Cardiovascular effects of the sympathetic division include all except \________.

Dilation of the blood vessels serving the skin and digestive viscera

Which of the following is not a result of parasympathetic stimulation?

Dilation of pupils

The parasympathetic tone \________.

Determines normal activity of the urinary tract

Sympathetic division fibers leave the spinal cord in the:

Thoracolumbar region and the postganglionic fibers secrete norepinephrine

Sympathetic responses generally are widespread because \________.

Norepinephrine and epinephrine are secreted into the blood as part of the sympathetic response

Which of these effectors is not directly controlled by the autonomic nervous system?

Skeletal muscle

Preparing the body for the "fight-or-flight" response during threatening situations is the role of the:

Sympathetic nervous system

The parasympathetic fibers of the \________ nerves innervate smooth muscles of the eye that cause the lenses to bulge to accommodate close vision.

Oculomotor

The parasympathetic ganglion that serves the eye is the \________.

Ciliary ganglion

Which subdivision of the autonomic nervous system operates using the neurotransmitters norepinephrine and epinephrine:

Sympathetic

The "resting and digesting" division of the autonomic nervous system is the \________.

Parasympathetic division

The effects of the sympathetic nervous system are essentially the opposite of the:

Parasympathetic nervous system

Which of the following does not describe the ANS?

A. a system of motor neurons that innervates all muscle cells
B. involuntary nervous system
C. a system of motor neurons that innervates smooth and cardiac muscle and glands
D. general visceral motor system

A. A system of motor neurons that innervates all muscle cells

The white rami communicantes \________.

Carry preganglionic axons to the sympathetic chain

Sympathetic division stimulation causes \________.

Increased blood glucose, decreased GI peristalsis, and increased heart rate and blood pressure

Parasympathetic functions include \________.

Lens accommodation for close vision