Senses

Question 1

Sensory Receptor

Answer 1

Is able able to convert a signal from the environment, called a stimulus, into a nerve impulse.

Question 2

Sensory Transduction

Answer 2

The transversion of a stimulus from the environment into a nerve impulse

Question 3

Exteroceptors

Answer 3

Sensory Receptors that detect stimuli from outside the body such as those that result in taste, smell, vision, hearing, and equilibrium.

Question 4

Interoceptors

Answer 4

Receive stimuli from inside the body. They are directly involved in homeostasis.

Examples
- Baroreceptors: Respond to changes in blood pressure
Osmoreceptors: Monitor the body´s water and salt balance
Chemoreceptors: Monitor ph of blood

Question 5

Types of Sensory Receptors

Answer 5

Chemoreceptors- respond to chemical substances in the immediate vicinity
Photoreceptors- respond to light energy
Mechanoreceptors- are stimulated by mechanical forces which most often result in pressure of some sort
Thermoreceptors- stimulated by changes in tempeture

Question 6

Sensation

Answer 6

The conscious perception of stimuli. If nerve signals finally reach the cerebral cortex, sensation occurs.

Question 7

Sensory Adaptation

Answer 7

Decrease in response to stimulus over time

Question 8

Layers of the Eye

Answer 8

3 layers: sclera (outermost), choroid (middle, thin, extensive blood supply, dark pigment absorbs stray light rays that photorecepters have not absorbed), and the retina (filled with clear gelatinous material called the vitreous humor)

Question 9

Iris

Answer 9

• Iris regulates size of pupil. Behind the iris, the choroid thickens and forms the circular ciliary body.

Question 10

Pupil

Answer 10

• Pupil is a hole in the center of the iris through which light enters the eye

Question 11

Aqueous Humor

Answer 11

• Fills the anterior compartment

- Clear, watery fluid

Question 12

Vitreous Humor

Answer 12

• Holds the retina in place and supports the lense
• Clear gelatinous material
• Contains photoreceptors called rod cells and cone cells