Which is a TRUE statement about implantation of a blastocyst?
A. It occurs at the same time as, and is caused by, the LH surge.
B. When it occurs outside the uterus, it is called a myopic pregnancy.
C. It is a result of digestion of myometrial cells by enzymes in the trophoblast.
D. It occurs at a time in the cycle when plasma estrogen concentration is higher than progesterone concentration.
E. It normally occurs midway through the luteal phase.
Answer: E
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The layer of connective tissue that surrounds individual axons within a peripheral nerve is termed the
A) endoneurium. B) perineurium. C) epineurium. D) metaneurium. E) subneurium.
Which of the following is not a chemical class of neurotransmitters?
A) acetycholine B) amino acid C) biogenic amine D) ATP and other purines E) nucleic acid
What happens to blood pressure during exercise?
A. It increases slightly; some cardiovascular changes promote an increase while others promote a decrease. B. It decreases greatly because vasodilation in skeletal muscles and heart tissue more than offsets factors that increase blood pressure. C. It decreases slightly; some cardiovascular changes promote a decrease while others promote an increase. D. It increases greatly because cardiac output increases and vasoconstriction in inactive organs raises blood pressure directly.
What would be the body's response if the hypothalamus detected pyrogens?
A. An increase in body temperature set point B. Mobilization of lymphocytes from the bone marrow C. Increased sweating to lower body temperature D. Complement inhibition