Stimulus

Perception

Sensation

Sensory Receptors:

- convert energy of stimulus into action potentials

- Mechanoreceptors

 

 

But: Action potentials do not vary

How does the brain sort out what stimulus represents?

1.

2.

3.

Sensory adaptation

Somatic sensations

Special senses

SENSE OF VISION: Anatomy of the Eye

Wall of eyeball

1. Fibrous

2. Vascular

3. Sensory

Interior of Eyeball

Visual Accomodation

- adjustments in lens position or shape

To view close objects:

Photoreceptors

Rod cells

 

Cone cells

 

Other Structures:

Intrinsic muscles

 

Extrinsic muscles

 

*only organ in body with both voluntary and involuntary mm.

 

Eyebrows

Eyelids

 

Lacrimal Apparatus

 

Chapter 35 Review

Review questions 1-3, 10

Self quiz 1-7, 12-14