10317605
Description
Quiz by Michael Jardine, updated more than 1 year ago
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Created by Michael Jardine
about 7 years ago
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Question 1
Question
Which of the following is NOT a type of Calcium channel?
Answer
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G-type
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L-type
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N-type
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T-type
Question 2
Question
An L-type Calcium channel has how many subunits?
(each controlled by a separate gene)
Answer
-
2
-
3
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4
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5
-
6
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7
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8
Question 3
Question
An L-type Calcium channel is highly selective for Calcium, but is also somewhat permeable to Sodium and Potassium.
Answer
- True
- False
Question 4
Question
During diastole, the Na/Ca exchanger and the SR Ca pump both move Ca. Which way around?
Answer
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Na/Ca exchanger will pull Ca IN to the myoplasm; the SR Ca pump will pump Ca back INTO the SR.
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Na/Ca exchanger will pull Ca IN to the myoplasm; the SR Ca pump will pump Ca back OUT of the SR.
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Na/Ca exchanger will push Ca OUT from the myoplasm; the SR Ca pump will pump Ca back INTO the SR.
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Na/Ca exchanger will push Ca OUT from the myoplasm; the SR Ca pump will pump Ca back OUT of the SR.
Question 5
Question
The longitudinal SR contains a high concentrations of proteins acting as an ATP-dependent Ca pump - returning Ca from the myoplasm to the SR lumen (to help terminate contraction).
These proteins are called SERCA.
What does SERCA stand for?
[blank_start]S[blank_end] [blank_start]E[blank_end] [blank_start]R[blank_end] [blank_start]C[blank_end] [blank_start]A[blank_end]
Answer
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Sarco
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Sarcoplasmic
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Endo
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Endoplasmic
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[plasmic] Reticulum
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[plasmic] Ryanodine
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Calcium
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Concentration
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Activation
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Activator
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Adjustment
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ATPase
Question 6
Question
The role that Phospholamban plays in regulation of the SR Ca pump is:
Answer
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Inhibitory; cancelled when phosphorylated.
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Inhibitory; reinforced when phosphorylated.
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Permissive; cancelled when phosphorylated.
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Permissive; reinforced when phosphorylated.
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