Which of the following chemical compounds stimulate cold receptors in the skin and oral cavity?

A) Menthol
B) Monosodium glutamate (MSG)
C) Capsaicin
D) Camphor
E) Clove oil


A

Biology & Microbiology

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If a large 10-km asteroid or comet struck the Earth in the ocean floor, I. large amounts of molten rock would rain down on Earth and cause massive forest fires. II. giant tidal waves would result III. after effects would cause the deaths of most animal life on the planet. IV. thick clouds of dust would form and block out the Sun for an extended period

a. I & IV b. II & III c. I, II, & III d. I, II, III & IV e. II, III, & IV

Biology & Microbiology

Which animal is bilaterally symmetrical and has a pair of ganglia instead of a true brain?

a. jellyfish b. planarian c. earthworm d. grasshopper e. centipede

Biology & Microbiology

Which of the following is actively transported in the proximal tubules of the kidney?

a. bicarbonate ions b. sodium ions c. chloride ions d. water e. ADH

Biology & Microbiology

Which of the following nutrients is most closely linked to the energy cycle in ecosystems?

A) carbon B) nitrogen C) lead D) sulfur

Biology & Microbiology