CHAPTER 10: Somatic and Special Senses Flashcards Preview

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Flashcards in CHAPTER 10: Somatic and Special Senses Deck (63):
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Chemicals

Chemoreceptors

1

Pressure

Pain receptors

2

Temperature

Thermoreceptors

3

Touch

Mechanoreceptors

4

Light

Photoreceptors

5

A feeling that occurs when impulses are interpreted by the brain

Sensation

6

The brain causes these feelings to seem to come from the area being stimulated

Projection

7

Impulses fail to send signal due to continuous stimulation

Sensory adaptation

8

Senses that are associated with the skin, muscles, joints, and organs

Somatic senses

9

a) sensory nerve fibers
b) Meissner's corpuscles
c) Pacininan corpuscles

Touch and pressure senses

10

Sensitive to the motion of objects that barely contact the skin

Meissner's corpuscles

11

Stimulated by heavy pressure and deep pressure

Pacininan corpuscles

12

Two types of free nerve endings
• heat receptors
• Cold receptors

Temperature senses

13

Are free nerve endings found widely distributed throughout the skin and internal organs

Sense of pain

14

Widespread pain from the internal organ and can cause referred pain

Visceral pain

15

Pain feels like it is coming from other part of the body

Referred pain

16

choroids-

Skin like

17

Cochlea

Snail

18

Iris

Rainbow

19

Lacri-

Tears

20

Olfact-

To smell

21

Sclera-

Hard

22

Tympan-

Drum

23

Vitre-

Glass

24

Sense of smell

Olfactory sense

25

Chemical must enter the nose as a _______ and be partially dissolved in fluid to smell.

Gas

26

Chemicals detected by the olfactory receptor cells sent to the olfactory bulb and then sent to the brain via the _______.

Olfactory nerve

27

Sense of taste occurs on the _____ _____ on the tongue.

Taste buds

28

Taste buds are made up of:

• Taste cells
•Taste pores
•Taste hairs

29

Chemicals must be dissolved in a watery fluid for the taste cells to detect _____

Stimuli

30

The sense of smell also helps us ____ our food.

Taste

31

The 5 taste sensations are:

•sweet
•sour
•bitter
•salty
•umami (savory)

32

This functions to collect sound waves...

External ear

33

Involved with equilibrium

Semicircular Canal-inner ear

34

Interprets sound waves

Cochlea-Inner ear

35

Sound vibrations move hairs
-> stimulates nerves -> sends to brain

Organs of Corti

36

Helps maintain stability

Static equilibrium

37

Detects motion of the head and helps maintain balance while moving

Dynamic equilibrium

38

1. Eyelids
2. Conjunctiva
3. Extrinsic muscles
4. Lacrimal gland

Visual accessory organs

39

Membrane that lines inner surface of eyelids

Conjunctiva

40

Six muscles that move the eyeball

Extrinsic muscles

41

Secretes tears to moisten and lubricate eye and decreases chance of eye infection

Lacrimal gland

42

Cornea
Sclera
Optic nerve

Outer layer of the eye

43

Transparent covering over the eye

Cornea

44

White part of the eye

Scelera

45

Choroid coat
Ciliary body
Lens
Iris
Pupil

Middle tunic of the eye

46

Contains blood vessels and melanocytes to absorb access light

Choroid coat

47

Moves lens so it can focus

Ciliary body

48

Very flexible so it can focus on objects

Lens

49

Adjustment of the lens

Accommodation

50

Colored part of the eye
allows a certain amount of light into the eye

Iris

51

Opening into the eye

Pupil

52

Retina
Vitreous humor

Inner tunic of the eye

53

Contains photoreceptors
Produces sharpest vision

Retina

54

Point on the retina where lightwaves focus

Fovea centralis

55

Place where nerve fibers leave the retina and become optic nerve this causes a blind spot

Optic disc

56

Fluid inside eyeball

Vitreous humor

57

Outer layer
Middle tunic
Inner tunic

Three layers of the eye

58

Rods
Cones

Two types of visual receptors

59

100 times more sensitive than cones
Allows us to see in dim light

Rods

60

Allows us to see in color
Gives us sharper vision

Cones

61

Color vision seems to be related to the presence of three sets of cones containing different different light-sensitive pigments

Rhodopsin

62

Red
Blue
Green

Visual pigment