Physiology: Temperature Regulation and Stress Response
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Questions and Answers

Which of the following is NOT a characteristic of the autonomic nervous system (ANS) responses?

  • Reflex responses sensitive to emotional states
  • Automatic nature without voluntary control
  • Rapid onset within seconds
  • Conscious control over regulation of visceral functions (correct)

    • Which of the following is a primary function of the sympathetic division of the ANS during the 'fight-or-flight' response?

  • Stimulation of digestive processes
  • Constriction of blood vessels
  • Slowing of the heart rate
  • Increased blood flow to skeletal muscles (correct)

    • Which of the following environmental stimuli would trigger a response from the parasympathetic division of the ANS?

  • Encounter with a predator
  • Entering a warm, comfortable environment (correct)
  • Exposure to extreme heat
  • Engaging in strenuous physical activity

    • The autonomic regulation of which physiological function is under voluntary control?

    <p>Urination and defecation</p> Signup and view all the answers

    Which of the following is a key role of the autonomic nervous system in maintaining homeostasis?

    <p>Both (a) and (c)</p> Signup and view all the answers

    What is the primary mechanism by which the autonomic nervous system responds to environmental stimuli like temperature changes?

    <p>Reflexive changes in the activity of target organs based on sensory information</p> Signup and view all the answers

    What neurotransmitter is released by postganglionic parasympathetic fibers at effector organs?

    <p>Acetylcholine</p> Signup and view all the answers

    Which neurotransmitter is inactivated by recapture by postganglionic nerve varicosities?

    <p>Epinephrine</p> Signup and view all the answers

    Which type of receptors are found on the post synaptic membrane of both sympathetic and parasympathetic ganglia?

    <p>Nicotinic receptors</p> Signup and view all the answers

    What receptor type is excited by acetylcholine at ganglia?

    <p>Nicotinic receptor</p> Signup and view all the answers

    Which neurotransmitter is released by sympathetic nerves to sweat glands?

    <p>Acetylcholine</p> Signup and view all the answers

    What neurotransmitter is broken down by acetylcholinesterase in the parasympathetic system?

    <p>Acetylcholine</p> Signup and view all the answers

    Which of the following is NOT a function of the Autonomic Nervous System (ANS)?

    <p>Control of skeletal muscle movement</p> Signup and view all the answers

    Which division of the ANS is responsible for the constriction of the pupil in response to bright light?

    <p>Parasympathetic division</p> Signup and view all the answers

    Which of the following is NOT a function of the ANS in maintaining homeostasis?

    <p>Control of skeletal muscle contraction</p> Signup and view all the answers

    Which division of the ANS is primarily responsible for the 'fight-or-flight' response?

    <p>Sympathetic division</p> Signup and view all the answers

    Which of the following statements about the ANS is TRUE?

    <p>It plays a role in maintaining homeostasis</p> Signup and view all the answers

    Which of the following statements about the ANS is FALSE?

    <p>It controls the movement of skeletal muscles</p> Signup and view all the answers

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