Lesson Overview Lesson Overview The Peripheral Nervous System Objectives 31.3 The Peripheral Nervous...
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Lesson Overview The Peripheral Nervous System Objectives 31.3 The Peripheral Nervous System -Describe the functions of the sensory division of the peripheral nervous system. -Describe the functions of the motor division of the peripheral nervous system.
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Transcript of Lesson Overview Lesson Overview The Peripheral Nervous System Objectives 31.3 The Peripheral Nervous...
Lesson Overview The Peripheral Nervous System
Objectives 31.3 The Peripheral Nervous System
-Describe the functions of the sensory division of the peripheral nervous system.
-Describe the functions of the motor division of the peripheral nervous system.
Mark Hughes
All that's left are the missing images. :-D
Lesson Overview The Peripheral Nervous System
The Peripheral Nervous System
The peripheral nervous system consists of all the nerves and associated cells that are NOT part of the brain or spinal cord.
Lesson Overview The Peripheral Nervous System
The Sensory Division
The sensory division of the peripheral nervous system transmits impulses from sense organs to the CNS.
Lesson Overview The Peripheral Nervous System
Sensory receptors are categorized by the type of stimuli to which they respond.
Lesson Overview The Peripheral Nervous System
The Motor Division
The motor division of the peripheral nervous system transmits impulses from the central nervous system to muscles or glands.
Lesson Overview The Peripheral Nervous System
Somatic Nervous System
The somatic nervous system regulates body activities that are under conscious control, such as the movement of skeletal muscles.
Lesson Overview The Peripheral Nervous System
Reflex Arcs The somatic nervous system also controls your reflex responses.
For example, if you accidentally step on a tack with your bare foot, your leg may recoil before you are even aware of the pain.
This rapid response (a reflex) is caused by impulses that travel a pathway known as a reflex arc.
Lesson Overview The Peripheral Nervous System
Reflex Arcs
Lesson Overview The Peripheral Nervous System
Autonomic Nervous System
The autonomic nervous system regulates activities that are involuntary, or not under conscious control.
Lesson Overview The Peripheral Nervous System
Autonomic Nervous System
The autonomic nervous system consists of two parts, the sympathetic nervous system and the parasympathetic nervous system.
In general, the sympathetic and parasympathetic systems have opposite effects on each organ they influence. Heart rate is increased by the sympathetic nervous system but decreased by the parasympathetic nervous system.
Lesson Overview The Peripheral Nervous System
True or False
Sensory receptors that alert your brain when it is cold outside are called thermoreceptors. _________________________
The muscles in your stomach responsible for churning and mixing food are controlled by the somatic nervous system. _________________________
During brain surgery, patients are sometimes kept awake. This is possible because the brain does not contain chemoreceptors. ______________________________
Lesson Overview The Peripheral Nervous System
Answers
Sensory receptors that alert your brain when it is cold outside are called thermoreceptors.True
The muscles in your stomach responsible for churning and mixing food are controlled by the somatic nervous system. False, autonomic
During brain surgery, patients are sometimes kept awake. This is possible because the brain does not contain chemoreceptors. False, pain receptors
