Contraction of the cremaster muscles
A) relaxes the scrotal sac.
B) pulls the testes closer to the body cavity.
C) propels sperm through the urethra.
D) moves sperm through the ductus deferens.
E) both relaxes the scrotal sac and propels sperm through the urethra.
Answer: B
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Thin, broad bones should be classified as:
A) long bones. B) irregular bones. C) flat bones. D) short bones.
Which of the following is a lung disease marked by a reduced number of cilia, reduced motility of the remaining cilia, goblet cell hypertrophy and hypersecretion, and thick sputum?
A. Chronic bronchitis B. Emphysema C. Asthma D. Atelectasis E. Oat-cell carcinoma
Nerve fibers from the medial aspect of each eye ________.
A) go to the superior colliculus only B) pass posteriorly without crossing over at the chiasma C) divide at the chiasma, with some crossing and some not crossing D) cross over to the opposite side at the chiasma
The blood pressure in the large systemic arteries is greatest during
A) atrial systole. B) ventricular systole. C) atrial diastole. D) ventricular diastole.