Quiz
PHSI3011 01-2 Cardiac excitation-contraction coupling 1 - Channels, exchangers, pumps
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Questions in this quiz (6)
1Which of the following is NOT a type of Calcium channel?
- AG-type
- BL-type
- CN-type
- DT-type
2An L-type Calcium channel has how many subunits?
(each controlled by a separate gene)- A2
- B3
- C4
- D5
- E6
- F7
- G8
3An L-type Calcium channel is highly selective for Calcium, but is also somewhat permeable to Sodium and Potassium.
- ATrue
- BFalse
4During diastole, the Na/Ca exchanger and the SR Ca pump both move Ca. Which way around?
- ANa/Ca exchanger will pull Ca IN to the myoplasm; the SR Ca pump will pump Ca back INTO the SR.
- BNa/Ca exchanger will pull Ca IN to the myoplasm; the SR Ca pump will pump Ca back OUT of the SR.
- CNa/Ca exchanger will push Ca OUT from the myoplasm; the SR Ca pump will pump Ca back INTO the SR.
- DNa/Ca exchanger will push Ca OUT from the myoplasm; the SR Ca pump will pump Ca back OUT of the SR.
5The 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]- ASarco
- BSarcoplasmic
- CEndo
- DEndoplasmic
- E[plasmic] Reticulum
- F[plasmic] Ryanodine
- GCalcium
- HConcentration
- IActivation
- JActivator
- KAdjustment
- LATPase
6The role that Phospholamban plays in regulation of the SR Ca pump is:
- AInhibitory; cancelled when phosphorylated.
- BInhibitory; reinforced when phosphorylated.
- CPermissive; cancelled when phosphorylated.
- DPermissive; reinforced when phosphorylated.
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- PHSI3011 01-2 Cardiac excitation-contraction coupling 1 - Channels, exchangers, pumps
- Author
- Michael Jardine
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- English
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