During exercise the heart beats faster to

a. carry digestive juices to small intestine
b. provide muscles with additional oxygen
c. lower the blood pressure
d. digest more food


Answer: c. lower the blood pressure

Biology & Microbiology

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Which is true of heterotrophs?

A) They capture light energy. B) They cannot be unicellular. C) They store energy in the form of heat. D) They can function as autotrophs in an emergency. E) They can obtain energy from consuming phototrophs.

Biology & Microbiology

In this chemical synapse, which structure represents the vesicle releasing neurotransmitter molecules?

a. A b. B c. C d. D e. E

Biology & Microbiology

Which vitamin is produced in humans when exposed to sunlight?

a. A b. B1 c. C d. D e. folic acid

Biology & Microbiology

Which of the following is characteristic of the developmental pattern referred to as mosaic

development? a. The cells of the adult are very different from each other. b. The fate of adult cells is predetermined in embryonic founder cells. c. Adult cells are richly interspersed with proteins. d. Embryonic cells have a wide range of possible developmental patterns. e. Embryos have a wide range of morphologies, but all look identical as adults.

Biology & Microbiology