Chpt.10 WSH

What makes up the central nervous system?

The brain and spinal cord

What does the peripheral nervous system do?

Connects the central nervous system to the rest of the body

Do afferent neurons carry motor signals to muscles?

No, they carry sensory signals to the CNS

What part of neurons does multiple sclerosis damage?

The myelin sheath

What happens when a muscle fiber receives a nerve impulse?

It contracts

Are migraines caused only by muscle strain in the neck?

No

Which neuron structure receives incoming signals?

Dendrites

Which division of the nervous system controls voluntary movement?

Somatic nervous system

What do efferent neurons carry?

Signals from the CNS to muscles

What is the function of myelin?

Speeds up nerve impulses

Which muscle fiber type is best for endurance?

Slow-twitch

What nervous system process does drug addiction most directly affect?

Impulse processing

Which condition is an autoimmune disorder?

Multiple sclerosis

What system includes all nerves outside the brain and spinal cord?

Peripheral nervous system

Neurons that carry information toward the CNS are called what?

Afferent neurons

What is the gap between two neurons called?

Synapse

What is the long extension of a neuron that sends impulses away from the cell body?

Axon

What is the main difference between the central and peripheral nervous systems?

CNS processes information, PNS sends signals to and from the body

What is the difference between afferent and efferent neurons?

Afferent carry sensory signals to CNS; efferent carry motor signals away from CNS

What do dendrites do?

Receive incoming signals

What does the axon do?

Conducts electrical signals away from the neuron

How do migraines differ from regular headaches?

migraine

-throbbing, severe pain

Headache

-dull pain, light pressure

What abnormal brain activity are migraines associated with?

Abnormal activity in the brain

How do motor neurons and muscle fibers work together to produce movement?

Motor neurons send signals to the muscle fibers producing movement