Which type of receptor is a glycine-gated Cl- channel?
A. Adrenergic
B. Ionotropic
C. Muscarinic
D. Nicotinic
E. Metabotropic
Answer: B. Ionotropic
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Which of the following statements about structural maintenance of chromosomes (SMC) proteins is true?
A. They have four distinct domains: N, C, and two ?-helical coiled-coil domains. B. They are usually dimeric and dimerization forms the ATP-binding site. C. Dimers of SMC proteins are all homodimers having identical subunits. D. Dimerization of SMC proteins creates a molecule with two heads and two ATP-binding sites. E. The ATP bound by SMC proteins is hydrolyzed before the heads come together in the dimer.
Depolarization of a membrane is achieved through what process?
a. sodium exiting the membrane via sodium channels b. potassium exiting the membrane via potassium channels c. the influx of sodium via the opening of sodium channels d. the work of the sodium-potassium pump
Most of the filtrate is reabsorbed through the walls of the:a
distal convoluted tubule. b. loop of Henle. c. proximal convoluted tubule. d. collecting duct. e. glomerulus
These photosynthetic organisms can cause paralytic shellfish poisoning.
a. Apicomplexa b. ciliates c. dinoflagellates d. Microsporidia