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Flashcards in SENSES (4) Deck (29):
1

sensory receptors

dendrites specialized to detect certain types of stimuli

2

extroceptors

detect stimuli from outside the body (taste, smell, vision, hearing, and equilibrium)

3

interoceptors

detects stimuli from inside the body
-changes in the blood pressure
-changes in the blood volume
-monitor pH of the blood

4

chemoreceptors

respond to chemical substances (taste, smell, and monitor blood pH)

5

pain receptors (nocicepters)

naked dendrites that respond to chemicals released by damaged tissues (pain from the skin and the internal organs)

6

photoreceptors

respond to light energy (cones and rods)

7

ADH

keep H2O

8

mechanoreceptors

stimulated by mechanical forces (touch, pressure, hearing, balance, degree of lung inflation, and changes in blood pressure

9

baroreceptor

changes in blood pressure

10

thermoreceptor

stimulated by changes in temp (warm and cold)

11

how sensation occurs

-when nerve impulses arrive at the cerebral cortex of the brain
-perception, which also occurs in the cerebral cortex, is an interpretation of this

12

proprioceptors

mechanoreceptors involved in reflex actions that maintain muscle tone (balance and posture)

13

pain from the heart

pain felt in the left shoulder and arm

14

olfactory

smell receptors

15

3 layers of the eye

1. sclera (white of the eye) maintains the shape of the eye
2. choroid (middle layer of cells) nourishes the tissues of the eye and absorbs scattered light rays
3. retina (contains visual receptors) where image is produced- upside down

16

rods

-sensitive to light
-contain a visual pigment called rhodopsin
-important for peripheral and night vision
-vitamin A is important for proper functioning

17

cones

-require bright light to respond to wavelengths of light (color)
-they are located mostly in the fovea
-allow us to detect fine detail and color

18

color blindness

5% to 8% of the male population is unable to distinguish the colors red and green

19

glaucoma

fluid pressure builds up in the eye

20

astigmatism

condition in which the cornea or lens is uneven, leading to a fuzzy image

21

nearsightedness

eyeball is too long, making it hard to see far away objects

22

farsightedness

eyeball is too short, making it hard to see near objects

23

pinna (ear flap)

catches sound waves

24

auditory canal (connects pinna to the eardrum)

directs sound waves to the tympanic membrane

25

cochlea (inner ear)

-converts vibrations into nerve impulses
-contains the spinal organ which is the sense organ containing hairs for hearing

26

semicircular canals (inner ear)

-detects angular movement (rotational equilibrium)

27

nocieptor

Sensory receptor that is sensitive to chemicals released by damaged tissues or excess stimuli of heat or pressure; pain receptors.

28

gustation (chemo)

taste receptor

29

equilibrium

-mechanos (ears, eyes, proprio, hearing)