Nerve Structure and Function Quiz

What is the function of fascicles in a nerve?

• Bundles of axons grouped together within a nerve

• The outermost layer of dense connective tissue

• A protective sheath surrounding each fascicle

• The innermost layer that surrounds individual axons

Which layer of a nerve encases the entire nerve and provides protection?

• Perineurium

• Endoneurium

• Epineurium

• Fascicles

What is the role of the perineurium in a nerve?

• Encases the entire nerve

• Surrounds individual axons

• Provides a barrier to protect nerve fibers

• Facilitates rapid signal transmission

Which layer surrounds individual axons within a fascicle?

• Epineurium

• Perineurium

• Endoneurium

• Tracts

What is white matter primarily composed of?

• Neuronal cell bodies

• Myelinated axons

• Unmyelinated axons

• Dendrites

What does gray matter contain?

• Myelinated axons

• Bundles of axons

• Neuronal cell bodies and dendrites

• Protective sheaths

What are tracts in the CNS analogous to in the PNS?

• Fascicles

• Nerves

• Synapses

• Ganglia

What is the function of sensory receptors?

• Transmit sensory information to the CNS

• Detect stimuli and convert them into nerve impulses

• Carry commands from the CNS to muscles

• Connect sensory and motor neurons

What do sensory neurons do?

• Transmit impulses from the CNS to effectors

• Transmit sensory information to the CNS

• Detect stimuli

• Connect sensory and motor neurons

What is the role of motor neurons?

• Transmit sensory information to the CNS

• Detect stimuli

• Carry commands from the CNS to muscles and glands

• Connect sensory and motor neurons