Senses

Question 1

Fx of rods

Answer 1

1 of 2 photoreceptors - allows you to see in dim light pg 577

Question 2

Layers of retina

Answer 2

Retina - the deepest layer of the eye,
Pigmented layer -pigment cells
Neural Layer -photoreceptors pg.576

Question 3

Visual pathway

Answer 3

1. Photoreceptors in the retina (rods and cones)
2. Optic nerves
3. Optic chiasm
4. Optic tract
5. Lateral geniculate body
6. Optic radiation fibers that link the geniculate bodies to the visual cortex
7. Visual cortex of cerebral hemispheres
   pg 588-590

Question 4

Photoreceptors

Answer 4

Cells that detect Light pg 577

Question 5

Near and far focusing (how it happens)

Answer 5

Accommodation:
Close vision: ciliary contracts; lens rounds
Distant Vision: ciliary relaxes; lens flattens
page 582

Question 6

Response to light

Answer 6

Light is refracted as it passes the cornea & lens, then accommodates to focus an image to the retina pg 607

Question 7

Momentum changes

Question 8

Receptors for body position

Answer 8

Proprioceptors pg.517

Question 9

Ceruminous gland

Answer 9

Secretes earwax (cerumen) to keep insects and objects out of the external acoustic meatus pg.593

Question 10

Replacement of sensory neuorns

Answer 10

The basal epithelial cells divide to replace old olfactory sensory neurons pg 567

Question 11

Gustatory receptors

Answer 11

Taste buds - gustatory epithelial cells - taste hairs - taste pore (narrow opening) 10-day lifespan

Question 12

Proprioceptors

Answer 12

Report movement/position of skeletal muscles & joints

Question 13

Baroreceptors

Question 14

Mechanoreceptors

Answer 14

Hair cells are the basic receptors for equilibrium and hearing

Question 15

Nocioreeptors

Answer 15

Pain

Question 16

Reflexes

Question 17

Adaptation of receptors

Answer 17

losing awareness of repetitive stimuli or becoming more aware due to changes in the environment (hearing your heartbeat in a quiet room)