Lecture Quiz 7

A  Na+ diffuses in and the rod cell is depolarized

B  voltage-regulated calcium gates close and rods stop releasing of inhibitory neurtransmitters

C  rods stop releasing of inhibitory neurtransmitters

D  voltage-regulated calcium gates close

E  light strikes rhodopsin causing c-GMP channels to close

A  hypothalamus

B  medulla oblongata

C  primary visual cortex

D  visual association area

E  thalamus

A  TRUE

B  FALSE

A  inhibition (hyperpolarization) of bipolar cells

B  rod cells are inhibited (hyperpolarized)

C  neurons of the optic nerve do not produce an action potential

D  ganglion cells unable to produce an EPSP

E  rod cell release inhibitory transmitters

A  FALSE

B  TRUE

A  high visual acuity

B  used for day vision

C  contains the pigment rhodopsin

D  low sensitivity to light

E  most are found in the fovea centralis

A  FALSE

B  TRUE

A  light rays traveling through the curved portions of the lens are not refracted and light rays traveling through the center of the lens are refracted through the focal point

B  the image will be upside down

C  image will be at the intersection of the two light rays

A  FALSE

B  TRUE

A  a receptor potential is generated

B  an action potential occurs in the olfactory nerve

C  impulses travel to the thalamus and then to the olfactory area of the cerebral cortex

D  impulses travel to the olfactory bulb

E  odorants (air-borne chemicals) bind to surface receptors on the olfactory hairs

A  FALSE

B  TRUE

A  acids

B  salts

C  alkaloids

D  proteins

E  sugars and alcohols