The repolarization of the action potential involves the opening of
A. voltage-gated Na+ channels.
B. chemically gated Na+ channels.
C. voltage-gated K+ channels.
D. chemically gated K+ channels.
Answer: C
You might also like to view...
As a group, the pituitary hormones that stimulate the ovaries and testes are known as what?
a) oxytocins b) releasing hormones c) estrogens d) gonadotropins
What is the role of tropomyosin in a sarcomere?
A. It is the main protein component of thin myofilaments. B. It is the main protein component in thick myofilaments. C. It blocks the active sites on actin filaments in relaxed muscle fibers. D. It binds to calcium to initiate muscle contraction. E. It is the main component of elastic filaments.
What type of tissue makes up the adenohypophysis, or anterior pituitary gland?
A) nervous tissue B) glandular epithelium C) loose adipose connective tissue D) dense elastic connective tissue
Which of the following is true regarding cortisol?
A) It stimulates glucose intake by most organs. B) It stimulates protein synthesis. C) It promotes breakdown of fat and protein. D) It promotes glycogen synthesis. E) It inhibits fat digestion.