Which muscle of the pelvic floor acts as a sphincter in the vagina and anal canal?
A. Levator ani
B. Bulbospongiosus
C. Ischiocavernosus
D. Coccygeus
E. Superficial transverse perineal muscle
Answer: A
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In fetal development, hemocytoblasts begin to colonize red mone marrow at approximately
A. 10 days. B. 10 weeks. C. 5 months. D. 8 months.
Select the correct statement about cardiac output
A) If a semilunar valve were partially obstructed, the end systolic volume in the affected ventricle would be decreased. B) Decreased venous return will result in increased end diastolic volume. C) A slow heart rate increases end diastolic volume, stroke volume, and force of contraction. D) Stroke volume increases if end diastolic volume decreases.
Which spinal nerves comprise the cauda equina?
A) coccygeal B) lumbar, sacral and coccygeal C) sacral D) sacral and coccygeal
The large cartilage of the larynx with an expansive posterior surface is (the)
A) arytenoid cartilage. B) corniculate cartilage. C) cricoid cartilage. D) thyroid cartilage. E) None of the answers are correct.