The Peripheral Nervous System The P.N.S.. Peripheral Nervous System Somatic Nervous System (_) – ______________________________ – Motor nerves – Messages.

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Presentation transcript:

The Peripheral Nervous System The P.N.S.

Peripheral Nervous System Somatic Nervous System (___) – ________________________________ – Motor nerves – Messages between brain and body - ________________________________ Autonomic Nervous System _( ) – ________________________________ -_________________________________

Peripheral Nervous System _____________________ _____________________ _____________________ ; the axons carry the messages from one nerve to the next. The PNS is made up: - _____________________ Found in the Skull - _____________________ Found in the Spinal Cord.

Spinal Nerves Spinal Nerves carry: - _______________________ - sensory (touch), and - _______________________ signals between the spinal cord and the body.

Cranial Nerves Cranial nerves _________________ _________________ ___________ They are “wired directly to the brain. _________________ _________________ ___________

Types of Nerves Sensory nerves ______________________________________ ____________________________________ Motor nerves: ______________________________________ ____________________________________

Motor vs. Sensory Nerves _________________ _________________ _________________ _________________ _________________ ________________________________________________ _____________ _____________ _____________ _____________ _____________ _____________ _____________ ???

Motor Neurons carry messages concerning voluntary movements from the brain to the muscles. Motor nerve: Starts: ___________ Ends:_____________ _______________ _______________ _______________

The Sensory Nerves relay to the brain information that originates OUTSIDE the body and is registered by the five senses. Sensory nerve: Start____________ Start: ____________ Ends: ____________ _______________ _______________ _______________

You accidentally touch the burner on your stove at home…. What happens? ________________________________ HOW DOES THIS HAPPEN? REFLEX RESPONSE

Reflex Response 1)The touch receptors in your hand _______________ __________________________________________ __________________________________________ 2) BUT this nerve impulse doesn’t get sent to the brain. WHY?__________________________________________ 3) Instead, a nerve impulse is commanded from the spinal cord to the hand muscles, telling them to draw away. __________________________________________ __________________________________________ __________________________________________

Consequences of Damage to Nerve Cells A.The nerve does not ___________________ B. The transmission of impulses may _______ ___________________________________ ___________________________________ C. Interpretation of the impulse may be ___________________________________ ___________________________________ ___________________________________

Review Questions- PNS 1)What are the 2 divisions of the peripheral nervous system and how are the different? 2) What is a nerve? 3) What two types of nerves exist and what are 2 differences between them? ?

4) What 3 types of neurons are involved in reflex responses and in what order do nerve impulses travel through them? 5) What is the difference between a voluntary movement such as walking and an involuntary movement such as a reflex response? 6) What could are consequences of nerve damage?