Q4 The amplitude of an action potential contains important i

Q4. The amplitude of an action potential contains important information about stimulus intensity
a. TRUE
b. FALSE

Q5. Bitter tastants bind to which of the following types of membrane receptor?
a. Ion channels
b. Receptor tyrosine kinases

c. G Protein-coupled receptors

d. Type I nuclear receptors

Q6. The characters in the Alfred Hitchcock classic, “The Birds”, would have been much safer had they each been carrying a can of pepper spray.
a. TRUE
b. FALSE

Solution

Q4. b. FALSE

Generally action potentials will have same amplitudes. Amplitude of action potential depends on properties of ion channels, mainly dependent on the influx of Na+. Changes in membrane potential, concentration of sodium, or channel (subtype) densities may therefore change the amplitude.

Q5. c. G Protein-coupled receptors

The standard bitter, sweet, or umami taste receptor is a G protein-coupled receptor