Integral membrane proteins that connect electrical synapses are called
A) gap junctions.
B) receptors.
C) desmosomes.
D) sodium channels.
E) leak channels.
Answer: A
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Which of the following is NOT true of G-protein complex action?
A. Stimulates a cell by opening ion channels in the plasma membrane B. Stimulates a cell by means of intracellular chemical signals C. Acts as an intermediate between a receptor and other cellular proteins D. Stimulates a cell by means of extracellular chemical signals E. Stimulates a cell by activating enzymes associated with the plasma membrane
Using the figure below, identify the labeled part.
1) Label A: ______________________________
2) Label B: ______________________________
3) Label C: ______________________________
4) Label D: ______________________________
5) Label E: ______________________________
6) Label F: ______________________________
7) Label G: ______________________________
8) Label H: ______________________________
9) Label I: ______________________________
10) Label J: ______________________________
11) Label K: ______________________________
12) Label L: ______________________________
13) Label M: ______________________________
14) Label N: ______________________________
15) Label O: ______________________________
16) Label P: ______________________________
17) Label Q: ______________________________
18) Label R: ______________________________
19) Label S: ______________________________
20) Label T: ______________________________
When ATP levels are low, the relationship between ATP and creatine phosphate is that
A) both have three phosphate groups. B) creatine phosphate supplies energy to regenerate ATP from ADP and phosphate. C) ATP supplies energy to synthesize creatine phosphate from creatine and phosphate. D) both are required to stimulate a muscle to contract.
Where is the levator palpebrae superioris?
a) B b) D c) E d) F e) G