STARTER #3 1.Label the cavities to the right a. b. c. d. 2.What type of tissue is this? 1.What type...

STARTER #3

1. Label the cavities to the right

a.

b.

c.

d.

2. What type of tissue is this?

1. What type of tissue lines organs and cavities?

NERVOUS SYSTEM IPP 1016-1024

FUNCTION• Network of neurons that

communicate and control the body through electrical impulses

• Includes neurons, brain and spinal cord

NEURONS

NEURONS• Axons: extension of cell body• Axon terminal: end of the axon • Dendrites: receive messages from other

neurons

NEURONS• Dendrites: receive messages from other

neurons• Synapse: gap between neurons

NEURONS• Myelin sheath: lipid layer around axon

(insulator)

WHAT DO YOU SEE?

TYPES OF NEURONS

1. Sensory (5 types) – carry information from the senses back to the brain

2. Motor – brings message from CNS to muscles/glands.

3. Interneurons – connect sensory and motor and carry impulses between them.

SENSORY RECEPTORS ( 5 TYPES)

• Neuron that detects stimuli.

MECHANORECEPTORS

• Detect pressure and movement

• Sense: Hearing and touch

THERMORECEPTOR

Detect temperature

PAIN RECEPTOR

Detect tissue damage

CHEMORECEPTORS

• Detects chemicals

• Sense: Smell and taste

Are the lines straight or crooked?

PHOTORECEPTOR• Respond to

variation in light

• Sense: sight

ASSIGNMENT

Nervous System Microslides