The membrane potential of most neurons at rest is:
A. equal to the equilibrium potential for potassium.
B. equal to the equilibrium potential for sodium.
C. slightly more negative than the equilibrium potential of potassium ion.
D. more positive than the equilibrium potential for potassium.
E. more positive than the equilibrium potential for sodium.
D
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A. Breathing air with increased PCO2 B. Higher than normal arterial pH C. Iron-deficiency anemia D. Lower than normal arterial PCO2 E. Breathing carbon monoxide
Which of the following statements is correct concerning the variation of voltage-gated ion channels?
A) Na+ channels have much greater diversity than K+ channels. B) Typically, a more complex nervous system also contains a greater diversity of channels. C) There is a great diversity of channels, but within a single organism, only one isoform of a channel can exist. D) There is a large diversity of channels, but they show no physiological significance.
Many growth factors that help regulate cell growth and division, such as nerve growth factor and epidermal growth factor, act via the JAK/STAT pathway
a. True b. False Indicate whether the statement is true or false
Dr. McInnis wants to obtain Mike's greatest possible vital capacity measurements. Which of the following body positions should Mike assume?
A. lying on his stomach B. standing C. lying on his back D. sitting on a chair