Deck 43: Neuroscience Iii: Sensory Systems

Question 1

Which of the following kinds of receptor consists only of a naked nerve fiber ending?

A) Pacinian corpuscle
B) cochlear hair cell
C) cone
D) Meissner's corpuscle
E) nociceptor

Answer 1

nociceptor

Question 2

Our sense "fullness" after a big meal is due to

A) mechanoreceptors.
B) thermoreceptors.
C) stretch receptors.
D) electromagnetic receptors.
E) chemoreceptors.

Answer 2

stretch receptors.

Question 3

A fish detects vibrations in the water by means of its __, which contains numerous __.

A) lateral line, hair cells
B) ear, statocysts
C) swim bladder, stretch receptors
D) skin, mechanoreceptors
E) lateral line, thermoreceptors

Answer 3

lateral line, hair cells

Question 4

A sense of hearing can be found in

A) vertebrates.
B) molluscs.
C) cnidarians.
D) arthropods.
E) vertebrates and arthropods.

Question 5

The perception of a certain pitch of sound depends partly on which of the following?

A) the amplitude of the sound waves
B) which bones of the middle ear are moved
C) which hair cells of the cochlea are stimulated
D) where particles settle in the semicircular canals
E) whether it is the round window or oval window that vibrates

Question 6

The ability to determine where a sound is coming from depends primarily on

A) differences in sound intensity in the two ears.
B) differences in time of sound arrival to the two ears.
C) differences in sound frequency received at the two ears.
D) differences in both frequency and intensity at the two ears.
E) None of these choices are correct.

Question 7

The ability to detect prey or obstacles using sound is exhibited by

A) bats.
B) dolphins.
C) moths.
D) sharks.
E) Bats and dolphins are both correct.

Question 8

Photoreceptors are sensitive to what general type of sensory information?

A) tactile
B) sound
C) temperature
D) chemicals in the animal's environment
E) electromagnetic radiation

Question 9

Which of the following animals DOES NOT have a compound eye?

A) crayfish
B) crab
C) squid
D) bee
E) butterfly

Question 10

The opening that light passes through as it enters a single-lens eye is termed the

A) pupil.
B) retina.
C) sclera.
D) aqueous humor.
E) iris.

Question 11

"Accomodation" is the process in the eye of

A) bending light rays to varying degrees by the lens.
B) converting light energy into electrical signals by the retina.
C) adjustment to varying light levels by altering the sensitivity of the eye.
D) adjustment of the amount of light admitted to the eye by adjusting pupil diameter.
E) regulation of vitreous humor volume.

Question 12

Rods are

A) concentrated in the fovea.
B) sensitive mainly to blue, green, or red light in humans.
C) the only photoreceptors which contain opsins.
D) the only photoreceptors which contain rhodopsin.
E) concentrated in the fovea and sensitive to colors.

Question 13

The specific compound that is capable of receiving light energy as the first step in sensory transduction is

A) retinal.
B) rhodopsin.
C) cone opsin.
D) vitamin A.
E) melanin.

Question 14

The tapetum lucidum is a key adaptation to

A) visual function in the deep sea.
B) visual function in fast moving predators.
C) visual function in brightly lit shallow marine waters.
D) visual function in prey species that require wide fields of vision.
E) visual sensitivity in nocturnally active animals.

Question 15

Males of many moth species have very large and elaborate antennae. These large antennae

A) enhance sensitivity for finding rotting food.
B) enhance sensitivity for finding flowers in bloom.
C) enhance sensitivity to sexual pheromones from females.
D) enhance sensitivity to compounds emitted by other males that are important in sexual competition.
E) serve an important aerodynamic function during flight.

Question 16

Which of the following could be found in or on the nasal epithelium of mammals?

A) a layer of mucus
B) olfactory receptors
C) basal cells that give rise to olfactory receptors
D) supporting cells between olfactory receptor cells
E) All of these choices are correct

Question 17

What part of an olfactory receptor neuron contains odorant receptors?

A) axon
B) soma
C) cilia
D) synapse
E) oligodendrocyte

Question 18

What structure in the CNS do neurons from olfactory epithelium first transmit action potentials to?

A) amygdala
B) accessory olfactory bulb
C) olfactory bulb
D) cerebral cortex
E) cerebellum

Question 19

Which of the main taste types for which we have receptors is important for detecting possible toxic substances?

A) salty
B) sweet
C) sour
D) bitter
E) salty and sweet

Question 20

Thermoreceptors are only located in the skin on the outside of the body.

Question 21

Processing of visual information occurs within the eye itself and before action potentials are sent via the optic nerve to the visual cortex.

Question 22

Rods and cones make direct contact with ganglion cells within the vertebrate retina.

Question 23

Our senses of taste and smell are enhanced when we are hungry.

Question 24

The lateral line system of fishes functions to detect vibrations in the water around them.