Final Practice: 1 Flashcards

1
Q
Adenyl cyclase causes:
A. ATP to be produced
B. Cellular cAMP to increase
C. A G protein to activate
E. A & B
A

Cellular cAMP to increase.

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2
Q
Phospho lipase C activation
A. Is caused by cAMP
B. Stimulates the production of PIP2
C. Leads to the leukotriene production
D. Increase Calmodulin
E. None of the above
A

E - none of the above.

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3
Q

Which of the following is true?
A. Intracellular fluid = low K+ and high Na+
B. Intracellular fluid has overall positive charge at membrane (at resting potential)
C. Extracellular fluid is characterized by high Cl- and high K+
D. Extracellular fluid is characterized by high Na+ and high Ca+
E. None

A

Extracellular fluid = high Na and high Ca

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4
Q
Depolarization is due to
A. Influx of K+
B. Efflux of Cl-
C. Influx of Na+ 
D. Efflux of Ca+
E. B and C
A

Influx of Na ONLY

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5
Q
Neural summation
A. Can be depolarizing
B. Can be hyperpolarizing
C. Always results in threshold
D. A and B
E. A and C
A

A. Can be depolarizing
AND
C. Always results in threshold

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