How do cardiac cells sustain a membrane potential of around 0 mV during the plateau phase?
A) calcium channels remain open
B) increased membrane permeability to sodium ions
C) increased membrane permeability to potassium ions
D) decrease in the amount of calcium diffusing across the membrane
Answer: A
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Dr. Sweet, along with a very small percentage of veterinarians attend continuing education conferences to learn new procedures and information
Indicate whether the statement is true or false
Answer the following statements true (T) or false (F)
1. The evaporation method of heat loss from the blood occurs by the absorption of heat by water vaporization. 2. The convection method of heat loss from the blood occurs by the transfer of heat energy to the skin and then to the external environment. 3. Shivering is a heat-generating activity of the body. 4. “Use of food” is a good phrase to describe metabolism. 5. Before food can be assimilated, it must be digested.
The feet of the sensory homunculus are located
A. medially on the precentral gyrus. B. laterally on the postcentral gyrus. C. laterally on the precentral gyrus. D. medially on the postcentral gyrus.
Renin has its direct effect on a molecule known as
A. angiotensinogen. B. vasopressin. C. aldosterone. D. angiotensin II.