Teratogens are most damaging to organ systems if exposure to them occurs
A. when the organ systems are undergoing peak development in the embryo.
B. early in pre-embryonic development.
C. in the fetal period, after systems have formed but have not completed maturation.
Answer: A
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A) uterus B) fallopian tubes C) vagina D) ovary
O2 levels are much more closely regulated than CO2 levels in the arterial blood
Indicate whether the statement is true or false
Which male gland is located behind the urinary bladder and secretes an alkaline fluid with fructose and prostaglandins?
A. Seminal vesicles B. Bulbourethral glands C. Cowper's glands D. Prostate
Which is NOT an effect of parathyroid hormone?
A. increases the bone-degrading activity of osteoclasts B. decreases reabsorption of calcium by the kidneys C. promotes vitamin D synthesis, leading to increased intestinal absorption of calcium D. increases plasma [Ca2+] E. decreases reabsorption of phosphate by the kidneys