The Peripheral Nervous System The P N S

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The Peripheral Nervous System The P. N. S.

The Peripheral Nervous System The P. N. S.

Peripheral Nervous System • Somatic Nervous System (___) – ________________ – Motor nerves –

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

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 carry: - ____________ - sensory (touch), and - ____________ signals between the

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.

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

Types of Nerves Sensory nerves ___________________ Motor nerves: ___________________

Types of Nerves Sensory nerves ___________________ Motor nerves: ___________________

Motor Neurons carry messages concerning voluntary movements from the brain to the muscles. Motor

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

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

You accidentally touch the burner on your stove at home…. What happens? ________________ HOW

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

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

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

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

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?