ANS – Flashcards

Which of the choices below describes the ANS? A. sensory neurons that convey information from somatic receptors in the head, body wall, and limbs and from receptors from the special senses of vision, hearing, taste, and smell to the CNS B. motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands C. sensory and motor neurons that supply the digestive tract D. motor fibers that conduct nerve impulses from the CNS to skeletal muscles

Which sympathetic fibers form the splanchnic nerve? A. those that pass through the trunk ganglion to synapse in collateral or prevertebral ganglia B. those that synapse with parasympathetic fibers C. those that synapse in the same trunk ganglion they entered D. those that synapse with somatic fibers

Which of the following effects is characteristic of the parasympathetic nervous system: A. decreases heart rate B. decreases activity of the digestive system C. increases metabolic rate D. stimulates sweat glands to produce perspiration E. decreases urine output

Erection of the penis or clitoris ________. Select one: A. is primarily under sympathetic control B. is the result of coordinated activation by both sympathetic and parasympathetic input C. depends very little on autonomic activation D. is primarily under parasympathetic control

A drug that might be used specifically to reduce heart rate in cardiac patients could be ________. A. anticholinesterase B. norepinephrine C. a beta-blocker D. epinephrine

Over 90% of all parasympathetic fibers are derived from cranial nerve number ________. Select one: A. V B. X C. VII D. XII

Which nervous system subdivision is a chain of two motor neurons consisting of a preganglion and a postganglionic neuron: A. somatic B. sensory C. central D. autonomic E. visceral

Preparing the body for the "fight-or-flight" response is the role of the ________. A. sympathetic nervous system B. somatic nervous system C. cerebrum D. parasympathetic nervous system

Beta-blockers ________. A. have widespread sympathetic effects B. are potent antidepressants C. increase a dangerously low heart rate D. decrease heart rate and blood pressure

Which of the following statements 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 nerves may leave the spinal cord at which vertebra? A. first coccyx B. first thoracic C. second cervical D. third lumbar

Which one of these effectors is NOT directly controlled by the autonomic nervous system: A. cardiac muscle B. skeletal muscle C. abdominal organs D. smooth muscle E. most glands

Which is a uniquely sympathetic function? A. regulation of respiratory rate B. regulation of cardiac rate C. regulation of pupil size D. regulation of body temperature

The somatic and autonomic nervous systems differ in all of the following except ________. A. all of the neurotransmitters B. their effectors C. their efferent pathways D. to some degree in target responses to their neurotransmitters

Cardiovascular effects of the sympathetic division include all except ________. A. constriction of most blood vessels B. dilation of the vessels serving the skeletal muscles C. dilation of the blood vessels serving the skin and digestive viscera D. increase of heart rate and force

Which of the following is not a result of parasympathetic stimulation? A. dilation of the pupils B. elimination of urine C. increased peristalsis of the digestive viscera D. salivation

The parasympathetic tone ________. A. causes blood pressure to rise B. prevents unnecessary heart deceleration C. determines normal activity of the urinary tract D. accelerates activity of the digestive tract

Sympathetic division fibers leave the spinal cord in the: A. craniosacral region, and the postganglionic fibers secrete acetylcholine B. craniosacral regions, and the postganglionic fibers secrete norepinephrine C. thoracolumbar region, and the postganglionic fibers secrete norepinephrine D. craniosacral region, and the preganglionic fibers secrete norepinephrine E. thoracolumbar region, and the postganglionic fibers secrete acetylcholine

Sympathetic responses generally are widespread because ________. A. inactivation of ACh is fairly slow B. preganglionic fibers are long C. preganglionic fibers are short D. NE 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? Select one: A. smooth muscle B. cardiac muscle C. most glands D. skeletal muscle

Preparing the body for the "fight-or-flight" response during threatening situations is the role of the: Select one: A. sympathetic nervous system B. parasympathetic nervous system C. somatic nervous system D. cerebrum E. afferent nervous system

The parasympathetic fibers of the ________ nerves innervate smooth muscles of the eye that cause the lenses to bulge to accommodate close vision. Select one: A. oculomotor B. abducens C. optic D. trochlear

The parasympathetic ganglion that serves the eye is the ________. Select one: A. pterygopalatine ganglion B. otic ganglion C. ciliary ganglion D. submandibular ganglion

Which subdivision of the autonomic nervous system operates using the neurotransmitters norepinephrine and epinephrine: A. somatic B. parasympathetic C. central D. peripheral E. sympathetic

The "resting and digesting" division of the autonomic nervous system is the ________. A. peripheral nervous system B. somatic division C. sympathetic division D. parasympathetic division

The effects of the sympathetic nervous system are essentially opposite of the: A. parasympathetic nervous system B. central nervous system C. autonomic nervous system D. sensory division E. motor division

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

The white rami communicantes ________. A. are unmyelinated B. carry postganglionic fibers to the periphery C. carry preganglionic axons to the sympathetic chain D. are found only in the C1-T1 cord segments

Sympathetic division stimulation causes ________. A. decreased blood glucose, increased GI peristalsis, and decreased heart rate and blood pressure B. increased blood glucose, increased GI peristalsis, and decreased heart rate and blood pressure C. decreased blood glucose, increased GI peristalsis, and increased heart rate and blood pressure D. increased blood glucose, decreased GI peristalsis, and increased heart rate and blood pressure

Parasympathetic functions include ________. A. mobilizing storage energy sources B. a stimulation of heart rate and force of contraction C. allowing the body to cope with an external threat D. lens accommodation for close vision