Unit 3 Nervous System Review

Area of the neuron that contains synaptic vesicles is called the

• axon
• myelin sheath
• axon terminal
• dendrite

Which of the following is NOT a characteristic of a graded potential?

• Forms on the dendrites
• Varies in strength
• Travels away from the cell body
• Magnitude decreases with distance traveled

The peripheral nervous system is composed of the

• cranial nerves, brain, spinal cord, and spinal nerves

• brain and spinal cord

• spinal nerves and cranial nerves

• interneurons

The somatic nervous system innervates _______ while the autonomic nervous system innervates ________.

• smooth muscle...skeletal muscle
• skeletal muscle...voluntary functions
• smooth muscle and cardiac muscle...skeletal muscle
• skeletal muscle...glands, cardiac muscle, and smooth muscle

The highly branched region of the neuron that the neurotransmitter binds to is called the

• dendrite
• axon
• axon hillock
• axon terminal

The cerebral hemispheres are separated from the cerebellum by the

• longitudinal fissure
• central fissure
• transverse fissure
• occipital fissure

The type of neuron that is responsible for sending information to the CNS is a

• sensory neuron
• motor neuron
• interneuron
• association neuron

The autonomic nervous system is divided into what two divisions?

• somatic and sympathetic
• sensory and motor
• somatic and sensory
• sympathetic and parasympathetic

The velocity of a nerve impulse is affected by

• axon diameter
• myelin sheath
• length of the dendrites
• both axon diameter and myelin sheath

The period of time when a neuron would only be stimulated by an exceptionally strong stimulus is called the

• relative refractory period
• absolute refractory period
• both absolute and relative refractory periods
• a stimulus will always cause an action potential