Although they are not a site of lymphocyte formation, _________ lymphatic structures provide sites where immune responses are initiated
A. hemopoietic
B. primary
C. red marrow
D. secondary
D
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G cells of the stomach secrete
A) cholecystokinin. B) secretin. C) gastrin. D) enteropeptidase. E) pepsin.
The circular folds of the small intestine enhance absorption by causing the chyme to spiral, rather than to move in a straight line, as it passes through the small intestine
Indicate whether the statement is true or false
Select the correct statement about fertilization
A) If estrogen is present, the pathway through the cervical opening is blocked from sperm entry. B) Both spermatozoa and the ovulated secondary oocyte remain viable for about 72 hours in the female reproductive tract. C) Once inside the uterus, most sperm cells are protected and remain viable. D) Millions of sperm cells are destroyed by the vagina's acidic environment.
List and explain two ways hormones affect their targets.
What will be an ideal response?