Contraction of leg muscles aid in the function of which system?
a. digestive
b. cardiovascular
c. respiratory
d. nervous
e. endocrine
ANSWER: b
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A(n) ________ is a chemical that can be used to sterilize materials.
A. disinfectant B. antiseptic C. oxidant D. sterilant
You are studying the hormonal control of metamorphosis in amphibians. If the anterior pituitary was prevented from
releasing TSH, what would be the effect on tadpoles?
a. Metamorphosis to adult frogs would be increased five-fold. b. Metamorphosis to adult frogs would not occur. c. Calcium secretion in tadpoles would be inhibited. d. Metabolism in tadpoles would be greatly increased. e. Metamorphosis would proceed, but arrest after limb formation.
Where is the central pacemaker that controls circadian rhythm found in many animals?
a. in the suprachiasmatic nucleus b. in the eye c. in the skin d. in the optic nerve
Proteins are made of building blocks called what?
A) amino acids B) lipids C) carbohydrates D) nucleic acids