Ch. 13 - PNS

Thermoreceptors:

• Respond to touch, pressure, vibration, & stretch

• Sensitive to changes in temperature

• Respond to light energy

• Respond to chemicals

Tags

NGSS.MS-LS1-8

Transmit impulses to third-order sensory neurons

• First-Order Sensory Neurons

• Second-Order Sensory Neurons

• Third-Order Sensory Neurons

What is the endoneurium?

• Coarse connective tissue that bundles fibers into fascicles

• Tough fibrous sheath around all fascicles to form the nerve

• Loose connective tissue that encloses axon and myelin sheath

Sensory Neurons are also called?

• Mixed nerves

• Afferent nerves

• Motor nerves

• Efferent nerves

Visceral efferent fibers in mixed nerves are what?

• Motor from brain to organs

• Sensory from organs to brain

• Sensory from muscle to brain

• Motor from brain to muscle

Ganglia are neuron cell bodies in the PNS

• True

• False

How many pairs of cranial nerves are associated with the brain?

• 11

• 9

• 12

• 6

Spinal nerves are connected via two structures. What are they?

• Ventral roots

• Dorsal roots

• Ventral ramus

• White matter

After exiting the foramen, spinal nerves divide into three branches. Which is the larger branch?

• Dorsal ramus

• Ventral ramus

• Meningeal branch

A learned/acquired reflex is a rapid, involuntary, and predictable motor response to stimulus

• True

• False