Autonomic Nervous System: Chapter 15
18 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main role of the hypothalamus?

  • Regulation of autonomic and endocrine function (correct)
  • Regulation of cardiovascular function
  • Control of emotional and memory functions
  • Control of somatic reflexes

Which drug has a large effect on the autonomic nervous system, can depolarize all nicotinic receptor synapses without acetylcholine present, and can cause an increase in blood pressure?

  • Caffeine
  • Cocaine
  • Phenylephrine
  • Nicotine (correct)

How does a sympathomimetic drug enhance adrenergic function?

  • By reducing norepinephrine production and release
  • By blocking removal of norepinephrine
  • By binding to receptors and increasing norepinephrine production and release (correct)
  • By decreasing blood pressure

Which part of the brain is responsible for emotion and memory function, with a strong connection to the hypothalamus?

<p>Amygdala (B)</p> Signup and view all the answers

In the context of drugs affecting the autonomic nervous system, what does 'exogenous chemical' refer to?

<p>Substance introduced from outside the body (D)</p> Signup and view all the answers

What effect does a sympatholytic drug have on adrenergic function?

<p>Interrupts sympathetic activity (B)</p> Signup and view all the answers

What is the second signaling molecule in the adrenergic synapse?

<p>Epinephrine (D)</p> Signup and view all the answers

Which type of receptor does norepinephrine bind to in the adrenergic synapse?

<p>Muscarinic receptors (D)</p> Signup and view all the answers

What is the function of norepinephrine in the sympathetic division?

<p>Activates muscarinic receptors of sweat glands and blood vessels (B)</p> Signup and view all the answers

Which branch of the autonomic system reacts to stretch stimuli in the aorta and carotid arteries?

<p>Afferent branch (D)</p> Signup and view all the answers

What type of reflex has a synapse located in the ganglia and is a completely peripheral, local response?

<p>Enteric reflex (C)</p> Signup and view all the answers

Without the parasympathetic signal, what would the heart rate be?

<p>$100$ bpm (D)</p> Signup and view all the answers

Where do sympathetic signals come from in the thoracolumbar system?

<p>Thoracic and superior lumbar nerves (A)</p> Signup and view all the answers

Which division of the ANS is associated with 'fight or flight' response?

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

Where do postganglionic fibers lead in the parasympathetic division?

<p>Terminal ganglia on or near the target effector (A)</p> Signup and view all the answers

Which part of the nervous system receives input from both sympathetic and parasympathetic divisions?

<p>Organs and systems (C)</p> Signup and view all the answers

Where does a preganglionic fiber in the parasympathetic division located in the brain go straight to?

<p>The ganglion through the cranial nerves (D)</p> Signup and view all the answers

What part of the nervous system has a direct connection to release molecules from preganglionic fibers?

<p>Adrenal medulla (C)</p> Signup and view all the answers

Flashcards

Hypothalamus Role

Regulates autonomic and endocrine functions, maintaining internal balance.

Nicotine's Effects

A drug affecting the autonomic nervous system that can depolarize nicotinic receptors and increase blood pressure.

Sympathomimetic Action

Enhances adrenergic function by binding to receptors and boosting norepinephrine.

Amygdala Function

Brain region for emotion and memory, strongly connected to the limbic system.

Signup and view all the flashcards

Exogenous Chemical

A substance introduced into the body from an external source.

Signup and view all the flashcards

Sympatholytic Effect

Interrupts or inhibits sympathetic nervous system activity.

Signup and view all the flashcards

Adrenergic Synapse Signal

Epinephrine (Adrenaline).

Signup and view all the flashcards

Norepinephrine Receptor

Norepinephrine binds to adrenergic receptors (alpha and beta).

Signup and view all the flashcards

Norepinephrine's Function

Activates muscarinic receptors of sweat glands and blood vessels.

Signup and view all the flashcards

Aorta/Carotid Senses Stretch

Afferent branch.

Signup and view all the flashcards

Enteric Reflex

A completely peripheral, local response with the synapse in the ganglia.

Signup and view all the flashcards

Heart Rate Without Parasympathetic Input

Approximately 100 bpm.

Signup and view all the flashcards

Sympathetic Signal Origin

Thoracic and superior lumbar nerves.

Signup and view all the flashcards

'Fight or Flight' Division

Sympathetic division.

Signup and view all the flashcards

Parasympathetic Postganglionic Fibers

Terminal ganglia on or near the target effector.

Signup and view all the flashcards

ANS Input Destination

Organs and systems.

Signup and view all the flashcards

Preganglionic Fiber Path

The ganglion through the cranial nerves.

Signup and view all the flashcards

Direct Connection for Molecule Release

Adrenal medulla.

Signup and view all the flashcards

More Like This

Use Quizgecko on...
Browser
Browser