Which of the following is/are sometimes called "prickling pain"?
A) mechanical damage
B) proprioception
C) extremes of temperature
D) fast pain
E) fast and slow pain
D
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Sperm cannot fertilize an egg unless they have been in the female reproductive tract for several hours. This enhanced ability of the sperm to fertilize the ovum is called capacitation. In vitro studies indicate that the sperm can fertilize the ovum if they are first washed before being introduced to the ovum. These observations suggest that
A) pH is an important factor in the process of capacitation. B) in capacitation, secretions of the female reproductive tract are taken up by the sperm. C) only sperm that come into contact with vaginal secretions are capable of fertilizing an ovum. D) capacitation is temperature-dependent. E) capacitation involves the removal of some inhibiting substance(s) from the sperm.
The adjustment of respiratory rate due to blood pressure rising and falling results from the stimulation or inhibition of the respiratory centers by sensory fibers in which cranial nerve(s)?
A) vagus (X) and accessory (XI) B) hypoglossal (XII) only C) glossopharyngeal (IX) and vagus (X) D) vagus (X) and hypoglossal (XII) E) glossopharyngeal (IX) and hypoglossal (XII)
Acidosis has what effect on the resting membrane potential of nerve cells?
A. It causes repolarization. B. It causes hyperpolarization. C. It causes depolarization above threshold. D. It causes depolarization below threshold.
Which condition listed gives rise to individuals that are
somewhat mentally disadvantaged, sterile males with undeveloped testes, scant body hair, and enlarged breasts? a) Emesis gravidarum b) Deformation c) Turner's syndrome d) Breech presentation e) Klinefelter's syndrome