Which of the following is NOT a protection
the body’s inner surfaces use against
penetration by harmful microorganisms?
a. thick stratified epithelial layers that prevent
penetration
b. sticky mucus that traps microorganisms
c. lysozyme that kills bacteria
d. cilia that sweeps away microorganims
e. all of these are protection against
penetration by harmful microorganims
A
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Which of the following characteristics are shared by all living organisms?
I. hereditary information is passed to offspring II. adaptation to environmental change III. requirement for nutrients IV. DNA housed in a nucleus
a. I and II b. I and III c. II and III d. I, II, and III e. I, II, III, and IV
The seminal vesicles (“sperm vessels”) are
misnamed. Sperm are actually stored in the a. vas deferens. b. epididymis. c. prostate. d. scrotum. e. urethra.
Which pairs of hormones have opposite effects?
A) testosterone and melatonin B) progesterone and insulin C) parathyroid hormone and calcitonin D) oxytocin and prolactin
Which system does the hypothalamus belong to?
A. the endocrine system B. the reproductive system C. both the nervous and the endocrine systems D. the cardiovascular system E. the nervous system