Nervous system- the five senses

All sensory organs contain..?

Sensory receptors-dendrites that react to a certain external or internal stimulus

What are the five major types of sensory receptors?

1.Mechanoreceptors (touch)

2. Thermoreceptors (temp variations)

3. Pain receptors (non receptors)

4. Chemoreceptors (chemicals)

5.photoreceptors (light)

Each sensory organ has..?

One or more of these receptors

The impulses produced in the skin are called?

cutaneous sensations

Cutaneous sensations include what five things?

Touch, heat, cold pressure and pain

These receptors are not equally _______ throughout the body.

Distributed

Some body parts are more _______ than others.

Sensitive

What are free nerve endings?

Sense pain, temp, touch and pressure

What is Meissner's corpuscles?

Encapsulated nerves endings found in hairless skin that detect light touch

What are Markel's disk?

Detect light touch and pressure within epidermis

What are hair follicle receptors?

The tech movement of hair

What are Ruffini's corpuscles?

Detect depress and stretching of the skin

What are Pacinian corpuscle?

Encapsulated nerve endings that detect depress and vibrations

The remaining senses- site hearing smell and taste are..?

Special senses

Why are they special senses?

Because the receptors are clustered and specialized organs example or in a small area area

What is an additional special sense that has receptors housed in the ear?

Balance