Question 41Which of the following is true of Gap Junctions in cardiac mucsle.A. Pairs of tetramamers assemble to form functional communication between cells.1695OB. Gap junctions are selective large pore channels.OC. Have a voltage sensor on the S4 alpha helix of each tetramer.OD. Facilitate electrical communication across the gap between the t-tubule and the sarcoplasmic reticulum.OE. None of the above.

Gap junctions in the cardiovascular muscle are framed by connexins, which are a group of…

Answered: Question 41 Which of the following is…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question 22 Listen Which of the following statements are true with respect to cardiac muscle? Select all that apply A Cardiac muscle is under voluntary control D Cardiac muscle contains intercalaned discs. Cardiac muscle is located in the heart Cardiac muscle lacks striations. 00000
QUESTION 13 Which of these is a 2nd messenger? OBa O CAMP O Calmodulin OCalcitonin
Please aid in answering these animal physiology questions based on action potential. Please be as detailed as possible.
QUESTION 4 What is the name of the change in Vm labeled B? +40 +20 Membrane potential difference (Vm) at rest -20 Vm -40 Vm -60 -80 В -100 -120 Time (msec) Membrane potential (mV)
QUESTION 7 The first heart sound is due to the: O closing of the atrioventricular valves closing of the semilunar (V-a) valves O opening of the atrioventricular valves O opening of the semilunar (V-a) valves O QUESTION 8 Which muscle types are innervated by motor neurons? O smootoh and cardiac O only smooth O cardiac and skeletal O only skeletal O smooth, cardiac, and skeletal O smooth and skeletal O only cardiac
QUESTION 6 In a voltage clamp: O A. A constant current across the membrane is maintained in order to counter balance changes in membrane potential. O B. A variable voltage is applied across the membrane in order to maintain a constant membrane potential O C.Avariable current is applied across the cell membrane in response to changes in the ion concentration outside the cell. O D.Changes in current applied to a membrane in order to maintain a constant voltage represent the flow of ions through channels in the membrane O E. both A. and C. O F. Both B. and D.
Question 4. You have identified a mouse that develops a leaky gut with leakage of conents of the intestine into the connective tissue. Which of the four junction that we discussed do you think may be dysfunctional in this mouse? Short Answer
QUESTION 38 Phase C of the ventricular action potential is due to which of the following? B -50 A -100 0.15 0.30 Time (s) Na* influx through F-type pacemaker channels Na* influx through voltage-gated channels Ca2+ influx O k* influx through voltage-gated channels Membrane potential (mV)
Question 3 In the Sino-Atrial Node which is not true? O A. Shows spontaneous (oscillatory) electrical behavior. B. Has a calcium mediated action potential upstroke. C. Has a stable resting membrane potential D. Has no inward rectifier potassium current. O E. Has an additional inward current that turns on during diastolic depolarization.
QUESTION 7 Which of the following represents a normal Po2 (mm Hg) in the aorta in a 70-kg male at rest? 40 0.04 160 100
Question 54 A heart murmur results from damage to resulting in O the atrioventricular valves; backflow of blood in the aorta O the aoritic semilunar valves; accumulation of blood in the aorta O the right atrium; cell death coronary arteries; cell death Exam #3 Lecture S...pdf Open file
Question 24 Which of the following is not true for conduction of the cardiac impulse? O A. Action potentials propagate by current flow through gap junctions. B. Propagation delay occurs due to calcium current reentry. OC. Slow propagation requires a slower (sustained) current source (i.e. Ca). O D. Fast propagation occurs as a result of high intercellular conductance. O E. All are true.

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