The following are the main steps in the generation of an action potential:
1. sodium channels are inactivated
2. more voltage-regulated potassium channels open and potassium moves out of the cell,
initiating repolarization
3. sodium channels regain their normal properties
4. a graded depolarization brings an area of an excitable membrane to threshold
5. a temporary hyperpolarization occurs
6. sodium channel activation occurs
7. sodium ions enter the cell and further depolarization occurs
The proper sequence of these events is
A) 6, 7, 4, 1, 2, 3, 5.
B) 2, 4, 6, 7, 1, 3, 5.
C) 4, 6, 7, 1, 2, 5, 3.
D) 4, 2, 5, 6, 7, 3, 1.
E) 4, 6, 7, 3, 2, 5, 1.
D) 4, 2, 5, 6, 7, 3, 1.
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A) head of the radius. B) pectoralis major muscle. C) linea alba. D) median cubital vein. E) None of the answers are correct.
Which of the following disciplinary courses of study contribute to understanding physiology?
a. physics b. genomics c. evolution d. molecular biology e. all of these
Which statement regarding the storage of your pig is the most correct?
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Flexion of the head is accomplished by the _______ neck muscles.
A. anterior B. posterior C. lateral