Circadian Rhythms and Tissue Transplants
18 Questions
0 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 likely reason for the increase in sympathetic nervous system activation and inflammation?

  • Sleep deprivation (correct)
  • Excess production of serotonin
  • Decrease in cortisol
  • High melatonin levels
  • Which proteins are involved in the cellular basis of circadian rhythms?

  • Amylase, pepsin, and lipase
  • Insulin, glucagon, and leptin
  • Hemoglobin, myoglobin, and collagen
  • Per, tim, and Clock (correct)
  • Which gland produces and releases more melatonin as a response to decreased SCN activity?

  • Parathyroid gland
  • Thyroid gland
  • Pineal gland (correct)
  • Pituitary gland
  • What helps initiate sleep through the suprachiasmatic nucleus (SCN)?

    <p>Elevated melatonin levels</p> Signup and view all the answers

    Which cells provide light information to the SCN?

    <p>Intrinsically photosensitive retinal ganglion cells (ipRGC)</p> Signup and view all the answers

    Which structure can generate and maintain circadian rhythms independently of input from other structures?

    <p>Suprachiasmatic nucleus (SCN)</p> Signup and view all the answers

    What is the main function of the SCN in regulating circadian rhythms?

    <p>Producing specific proteins that interact to create a self-sustaining feedback loop</p> Signup and view all the answers

    In Yamazaki et al.’s rat study, how did the adjustment time of liver tissues compare to that of the lung and muscle tissues following a phase shift?

    <p>Liver tissues required more cycles than lung and muscle tissues</p> Signup and view all the answers

    Which proteins inhibit the production of Clock, a key protein involved in circadian rhythms?

    <p>Per and tim proteins</p> Signup and view all the answers

    What is the role of CLOCK protein in the cellular basis of circadian rhythms?

    <p>Disinhibiting the production of per and tim proteins</p> Signup and view all the answers

    What mechanism does the SCN use to regulate the release of melatonin from the pineal gland?

    <p>Sympathetic nervous system</p> Signup and view all the answers

    What differentiates the adjustment speed of peripheral clocks from that of the SCN when faced with phase shifts?

    <p>SCN requires more cycles to adjust than peripheral clocks</p> Signup and view all the answers

    What is the primary function of the Cholinergic mesopontine nuclei?

    <p>Modulating the amount of sensory input the cortex receives</p> Signup and view all the answers

    Which neurotransmitter is predominantly associated with Locus coeruleus?

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

    What effect does continued activation by input from the raphe nuclei have on circuits promoting waking?

    <p>It inhibits them</p> Signup and view all the answers

    What happens in the thalamus when there are no inputs promoting waking?

    <p>Neurons synchronize activity in the cortex</p> Signup and view all the answers

    What is a direct effect of electrical stimulation of 'NREM-on cells' in the POA?

    <p>Immediate NREM sleep</p> Signup and view all the answers

    How do lesions of 'NREM-on cells' in the POA affect sleep?

    <p>Result in insomnia</p> Signup and view all the answers

    More Like This

    Circadian Rhythms Quiz
    6 questions

    Circadian Rhythms Quiz

    LustrousNourishment avatar
    LustrousNourishment
    Circadian Rhythms and SCN Overview
    20 questions

    Circadian Rhythms and SCN Overview

    PicturesqueOceanWave6430 avatar
    PicturesqueOceanWave6430
    Use Quizgecko on...
    Browser
    Browser