Contraction of leg muscles aid in the function of which system?

a. digestive
b. cardiovascular
c. respiratory
d. nervous
e. endocrine


ANSWER: b

Biology & Microbiology

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A(n) ________ is a chemical that can be used to sterilize materials.

A. disinfectant B. antiseptic C. oxidant D. sterilant

Biology & Microbiology

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.

Biology & Microbiology

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

Biology & Microbiology

Proteins are made of building blocks called what?

A) amino acids B) lipids C) carbohydrates D) nucleic acids

Biology & Microbiology