Biology 125 Chapter 12 Flashcards


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1

What receives a physical or chemical stimulus and ultimately causes nerve impulses to be generated in sensory neurons?

receptors

2

Mechanoreceptors specifically designed to monitor muscle length are?

muscle spindles

3

Slow pain originating from an internal organ is often perceived as coming from an area of the body totally unrelated to the source is known as?

referred pain

4

The intensity of a sound is specifically associated with its?

amplitude of the sound waves

5

When animals appear that danger can be sensed in the form of pheromones, what are they detected by?

olfactory neurons

6

What type of receptors is most likely to be classified as “silent” receptors?

chemoreceptors

7

Somatic receptors distributed throughout the body are linked to sensory neurons that send impulses to which region of the brain?

parietal lobe

8

Receptors for fast pain generally occur where?

Surface of the body

9

Receptors that detect odors are located in?

upper part of nasal passages

10

Whereas the sense of taste is based on _______(how many?) classes of taste receptors, the sense of smell has over_____(how many?) different receptors for chemicals associated with odor.

5, 1,000

11

_________ extend from the tip of taste cells in taste buds into the mouth.

Taste hairs

12

Vibration of the _____ bends hairs of the hair cells, which ultimately generate impulses in ______.

basilar membrane, sensory neurons

13

When a sound wave first arrives to the ear, the wave is directed toward the auditory canal by?

pinna

14

What structure is used to sense rotational movement of the head and body?

semicircular canals

15

What part of the eye is continuous with the cornea and forms the outer surface of the back of the eye?

sclera

16

Know the 5 parts of the eye where light passes through or hits.

cornea, retina , pupil, lens, iris

17

Within the cochlea, higher-frequency sounds are converted to electrical impulses near?

oval window

18

The transparent covering of the front of the eye is the?

cornea

19

The vestibule contains two fluid-filled chambers, called the utricle and saccule, which are alike in that?

they each have a gel-like substance on the inside

20

The vitreous humor fills the main chamber of the eye. What structure of the eye would vitreous humor come in contact with?

retina

21

The blind spot is associated with the?

optic disk

22

What occurs when bright light hits the eye?

the pupil decreases in size

23

The malleus and incus function to?

amplify sound

24

What medical condition results when the transparency of the lens decreases?

cataracts

25

Color blindness usually results from a decrease in the number of?

cones

26

LASIK treatment functions to improve eyesight by?

changing the shape of the cornea