THE NERVOUS SYSTEM.

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Presentation transcript:

THE NERVOUS SYSTEM

HOW THE NERVOUS SYSTEM WORKS RECEIVES INFORMATION RESPONDS TO INFORMATION MAINTAIN HOMEOSTASIS -- Keeping the body’s internal environment stable when the external environment changes.

NEURONS SENSORY, INTERNEURON, MOTOR A. SENSORY NEURONS -- picks up STIMULI from environment. The impulse travels to the ----- C. INTERNEURON -- found in the brain or spinal cord -- carries the impulse to the---- B. MOTOR NEURON -- sends impulse to muscle to RESPOND. A C B

NEURONS Dendrites Axon Movement of impulse Carry impulses TOWARD cell body Carry impulses AWAY from cell body DENDRITE Electrical charge is transmitted across SYNAPSE by CHEMICAL NEUROTRANSMITTERS.

DIVISIONS OF THE NERVOUS SYSTEM CENTRAL NERVOUS SYSTEM PERIPHERAL NERVOUS SYSTEM Branches out from CNS and connects it with the rest of the body

THE BRAIN CEREBRUM, CEREBELLUM, BRAIN STEM Divided into LOBES – frontal, parietal, temporal, occipital SOME FUNCTIONS – reasoning, planning, speech, movement, orientation, visual perception, memory, empathy, impulse control BRAIN STEM breathing, heartbeat, and blood pressure. Coordination of movement, posture, and balance

REFLEXES automatic response that occurs without conscious control INTERNEURUON IN SPINAL COLUMN

REFLEX IN ACTION

SENSATIONAL SENSATIONS

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