3.1 Peripheral Nervous System: Sensory Division, Motor Division, Somatic Nervous System, and Autonomic Nervous System

What are the two functional subdivisions of the PNS?

sensory and motor

What is the sensory division also called?

afferent division

What is the motor division also called?

efferent division

The sensory division has what type of nerve fiber?

sensory nerve fiber

What is the function of the sensory division?

receives sensory stimuli to send back to CNS/brain

What are the three things the somatic sensory fibers carry information from?

skin, skeletal muscles, and joints

What do visceral sensory fibers carry information from?

visceral cells (internal organs)

What type of nerve fiber is found in the motor division?

motor nerve fibers

What is the function of the motor division?

sends out information from the brain to effector organs

What two things does the motor division send signals to?

muscles (so they will contract) and glands (so they will secrete)

What are the two parts of the motor division?

somatic nervous system and autonomic nervous system

What type of nerve fibers does the somatic nervous system have?

somatic motor nerve fibers

Where does the somatic nervous system send impulses to>

skeletal muscles

The somatic nervous system conducts what type of movements?

voluntary movements

What type of nerve fibers does the autonomic nervous system have?

visceral motor nerve fibers

Where does the autonomic nervous system send impulses to?

smooth muscles, cardiac muscles, and glands

What types of movements does the autonomic nervous system control?

involuntary movements

Where in the body is the neuron cell body found in somatic motor nerve fibers?

CNS

The axon in somatic motor nerve fibers extends to where?

the skeletal muscle it affects

What neurotransmitter is released in order to stimulate contractions?

acetylcholine

The nerve impulses are sent down to the neuron's axon to where?

neuromuscular junction

What is acetylcholine released into for stimulation?

synaptic cleft

What does acetylcholine bind to on the skeletal muscle cell?

receptors

What neurotransmitter is released into the sympathetic nervous system?

nerepinephrine (NE)

What neurotransmitter is released into the parasympathetic nervous system?

acetylcholine (ACh)

In the autonomic nervous system, a two-neuron chain is used to connect the CNS to what?

effector organs