What structure compresses the urethra so that urine remains in the bladder?
A. Detrusor muscle
B. Trigone
C. Internal urethral sphincter
D. None of these are correct.
Answer: C
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Multicellular exocrine glands can be classified ________.
A) structurally into alveolar and acinar types B) structurally into vascular and avascular types C) functionally into merocrine, holocrine, and apocrine divisions D) functionally into secreting or nonsecreting types
A/an ____________ results from the mating of two closely related animals
Fill in the blank(s) with correct word
Which of the following does not help defend against cancer?
a. interferon b. macrophages c. natural killer cells d. cytotoxic T cells e. antibodies
A blood test for the prostate-specific antigen (PSA) is useful in the diagnosis of
A. prostatitis. B. prostatic atrophy. C. prostatic cancer. D. prostatic infection. E. urinary tract infection.