13) what are the major chemical buffer systems of the body?
a. the urinary and respiratory
b. the urinary and digestive
c. the bicarbonate, phosphate, and protein
d. the bicarbonate, nucleic acids, and protein
e. the bicarbonate, phosphate, and nitrate
14) which of the following major events of prenatal development happens first?
a. the eyes are fully open
b. the body is covered with lanugo
c. bone calcification begins
d. the central nervous system begins to form
e. meconium accumulates in the intestines
15) which of the followingbelong to the pulmonary circuit?
a. aorta and venae cavae
b. aorta and pulmonary veins
c. pulmonary arteries and venae cavae
d. venae cavae and pulmonary veins
e. pulmonary arteries and pulmonary veins
16) which hormone acts primarily on the uterus?
a. estrogen
b. androgen
c. progesterone
d. follicle-stimulating hormone
e. luteinizing hormone
17) renin hydrolyzes angiotensinogen, which isreleased from the _________, to form
angiotensin i.
a. lungs
b. kidneys
c. liver