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?

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Presentation transcript:

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 I PP

FUNCTION Network of neurons that communicate and control the body through electrical impulses Includes neurons, brain and spinal cord

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