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CVS Lecture 5

Rachel O' Flynn 8 questions 3.0 (1 rating) Updated 25 Feb 2018

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Questions in this quiz (8)

  1. 1Which of the following statements are false
    1. AMembrane permeability to Ca2+ is very high
    2. BThe membrane is not very permeable to K+ ions
    3. CPermeability to Na+ is 20% that for K+
    4. DThe ease with which the ion passes through the membrane is referred to as conductivity (C)
    5. EIf the conductance for an ion increases, the ion will pass through the membrane and a current will flow
  2. 2Fill in the blanks with positive and negativeImage for question 2
    1. APositive
    2. Bnegative
    3. Cpositive
    4. Dpositive
    5. Epositive
    6. Fpositive
  3. 3Which of the following statements are true?
    1. AThe resting membrane potential in contractile cells of the atria and ventricles is about -70mV
    2. BThe inside of the cell is positively charged in relation to the outside of the cell
    3. CThe resting membrane potential is primarily due to two
      things; the high concentration of potassium ions in the intracellular fluid and the high permeability of the cell membrane K+ ions as compared to other ions
    4. DThe resting membrane potential is close to the equilibrium potential for sodium
  4. 4Label the following image 0-4Image for question 4
    1. A0
    2. B1
    3. C2
    4. D3
    5. E4
  5. 5Which of the following are the events of phase 0 - upstroke
    1. APotential reaches threshold: –65 mV
    2. BMembrane’s ionic permeability suddenly changes
    3. CCell rapidly depolarises and over shoots to a positive potential of +40mV
    4. DAt the threshold potential, voltage sensitive potassium channels open very quickly
  6. 6The membrane potential does not reach the equilibrium potential of sodium because the outward [blank_start]potassium[blank_end] current is still flowing
    1. Apotassium
  7. 7In early repolarisation why is the overshoot brief?
    1. AFast sodium channels that are self inactivating decreases conductance of sodium
    2. BFast potassium channels that are self inactivating decrease conductance of potassium
    3. CVoltage sensitive sodium channels quickly close
    4. DVoltage sensitive potassium channels quickly close
  8. 8 Within a couple of milliseconds the membrane voltage repolarises a few mV, owing to an outward current of
    1. ACalcium ions
    2. Bpotassium ions
    3. Csodium ions

Information

Description
1st year college CVS Physiology Quiz on CVS Lecture 5, created by Rachel O' Flynn on 25/02/2018.
Language
English
Views
38
History
Created on 25 Feb 2018 · updated on 25 Feb 2018
Rating
3.0 out of 5 · 1 rating
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