18 Questions
Which of the following is NOT a characteristic of the autonomic nervous system (ANS) responses?
Conscious control over regulation of visceral functions
Which of the following is a primary function of the sympathetic division of the ANS during the 'fight-or-flight' response?
Increased blood flow to skeletal muscles
Which of the following environmental stimuli would trigger a response from the parasympathetic division of the ANS?
Entering a warm, comfortable environment
The autonomic regulation of which physiological function is under voluntary control?
Urination and defecation
Which of the following is a key role of the autonomic nervous system in maintaining homeostasis?
Both (a) and (c)
What is the primary mechanism by which the autonomic nervous system responds to environmental stimuli like temperature changes?
Reflexive changes in the activity of target organs based on sensory information
What neurotransmitter is released by postganglionic parasympathetic fibers at effector organs?
Acetylcholine
Which neurotransmitter is inactivated by recapture by postganglionic nerve varicosities?
Epinephrine
Which type of receptors are found on the post synaptic membrane of both sympathetic and parasympathetic ganglia?
Nicotinic receptors
What receptor type is excited by acetylcholine at ganglia?
Nicotinic receptor
Which neurotransmitter is released by sympathetic nerves to sweat glands?
Acetylcholine
What neurotransmitter is broken down by acetylcholinesterase in the parasympathetic system?
Acetylcholine
Which of the following is NOT a function of the Autonomic Nervous System (ANS)?
Control of skeletal muscle movement
Which division of the ANS is responsible for the constriction of the pupil in response to bright light?
Parasympathetic division
Which of the following is NOT a function of the ANS in maintaining homeostasis?
Control of skeletal muscle contraction
Which division of the ANS is primarily responsible for the 'fight-or-flight' response?
Sympathetic division
Which of the following statements about the ANS is TRUE?
It plays a role in maintaining homeostasis
Which of the following statements about the ANS is FALSE?
It controls the movement of skeletal muscles
Explore mechanisms of temperature regulation through cutaneous vasodilation and vasoconstriction, as well as the stress response involving the autonomic nervous system. Learn about the fight or flight response, increased heart rate, dilated pupils, and other physiological reactions to threatening stimuli.
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