Opening of sodium channels in the axon membrane causes
A) depolarization.
B) repolarization.
C) hyperpolarization.
D) increased negative charge inside the membrane.
E) inhibition.
A
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Which of the following is true of cell division?
A) Protein synthesis in preparation for division occurs during the S phase of interphase. B) Its importance diminishes after an individual grows to maturity. C) It requires mitosis only to produce two daughter cells. D) It requires accurate duplication (replication) of the genetic material. E) Each dividing cell produces four cells at a time.
The intrinsic pathway of coagulation is activated by the
A) release of tissue factor by a damaged endothelium. B) conversion of prothrombin to thrombin. C) activation of proenzyme exposed to collagen. D) sticking of platelets to damaged tissue. E) release of heparin from the liver.
Neurons have
A) a cell body and collagen fibers. B) connective tissue membranes surrounding them. C) striations and intercalated discs within their cell body. D) cilia along their cell membranes. E) a cell body, dendrites, and an axon.
What do the pharyngeal jaws of bony fishes do? How is this different from the actions of the anterior jaws (the premaxilla and maxilla)?
What will be an ideal response?