Gametes are produced in the essential reproductive organs called gonads, specifically the ovaries and _______.
a)testes
b)sperm
c)scrotum
d)penis
The urinary system helps to maintain the proper pH (acid-base) balance of the
a)brain.
b)muscles.
c)blood.
d)intestines.
Digestive enzymes are substances that break down complex nutrients such as proteins into
a)fatty acids.
b)triglycerides.
c)glucose.
d)simpler amino acids.
Kidneys secrete _______, which helps to regulate blood pressure.
a)insulin
b)vitamin D
c)renin
d)erythropoietin
The reproductive organs of both sexes are designed to produce and permit fertilization of the germ or “seed” cells called
a)protozoa.
b)sperm.
c)gametes.
d)ova.