Which of the following is/are TRUE regarding "non-REM sleep"?

a. energy consumption is reduced during non-REM sleep
b. it consists of four stages (stage 1 ~ 4)
c. EEG rhythms during non-REM sleep exhibit delta waves, theta waves, spindles, and K
complexes
d. all of the above


Answer: d. all of the above

Biology & Microbiology

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Which of the following is TRUE of ligand-gated ion channels?

A. They bind ions with high affinity. B. They tend to allow any ion to pass through the channel. C. The intracellular domain of the channel contains the binding site for the ligand. D. They open upon binding the ligand to allow specific ions to pass through them. E. Ligand binding closes the channels preventing further ion passage through the channel.

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Which type of media is designed to support the growth of a wide range of microorganisms?

a. Selective b. Nutritive c. Differential d. Definitive

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In social insects like bees and termites, the nonreproducing members of the hive are always ____

a. maturing into their reproductive phase b. past the age of reproduction c. closely related to the queen d. in competition for space and food e. males

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Animals, like fiddler crabs, that are busiest at dawn or dusk are known as:

a. crepuscular. b. nocturnal. c. diurnal. d. lunar. e. asynchronous

Biology & Microbiology