Quiz 6 Neurophysiology

Question 1

What produces an excitatory postsynaptic potential (EPSP)?

Answer 1

opening of ligand-gated sodium channels

Question 2

What is responsible for the absolute refractory period of the action potential?

Answer 2

inactivation of V-gated sodium channels

Question 3

What structural classification of sensory receptors includes Merkel cells of the epidermis, photoreceptor cells of the retina, gustatory receptor cells in taste buds, and hair cell receptors of the inner ear?

Answer 3

specialized receptor cells

Question 4

Increasing axon diameter decreases action potential velocity.

Answer 4

false

Question 5

What are the encapsulated nerve endings found in dermal papillae that function as phasic mechanoreceptors with small receptive fields for detecting the onset of light touch?

Answer 5

Meissner’s corpuscles

Question 6

What functional class of receptors includes the hair root plexus, Pacinian corspuscles, Merkel cells, Meissner’s corpuscles, and hair cell receptors of the inner ear?

Answer 6

mechanoreceptors

Question 7

What part of the cerebral cortex is responsible for perception of the tactile modality from the left half of the body?

Answer 7

right parietal lobe

Question 8

Where are the soma of the 2nd-order neurons in the dorsal column system, the sensory pathway that transmits the modalities of light pressure and hair movement?

Answer 8

medulla oblongata

Question 9

Where are the soma of the 1st-order neurons for somatosensory pathways?

Answer 9

dorsal root ganglia

Question 10

The AMPA glutamate receptor is an ionotropic receptor that produces EPSPs.

Answer 10

True