Nerve impulse transmissions occurring along myelinated neurons are called ________
A) saltatory conduction
B) repolarization
C) graded potential
D) sodium-potassium pump
E) all-or-none response
A
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At the end of meiosis II, one spermatogonium has formed
A) 2 fully functional sperm. B) 4 fully functional sperm. C) 2 spermatids. D) 4 spermatids. E) 1 sperm and 3 polar bodies.
Answer the following statements true (T) or false (F)
1. The respiratory membrane is found only in the lower respiratory tract. 2. The respiratory membrane plays an important role in air purification. 3. The uppermost part of the pharynx is the oropharynx. 4. Pulmonary ventilation and external respiration are different terms for the same thing.
Which of the following statements concerning the peripheral chemoreceptors is incorrect? The peripheral chemoreceptors
a. are stimulated whenever the arterial PO2 falls below normal. b. are weakly stimulated by a rise in arterial PCO2. c. are stimulated by an increase in arterial H+, which plays an important role in acid-base balance. d. are located at the bifurcation of the common carotid arteries and in the aortic arch. e. when stimulated, reflexively increase ventilation.
Excessive thirst is called _____.?
A) ?polyuria B) ?polydipsia C) ?polyphagia D) ?polygastria