Chapter 13: The Peripheral Nervous System and Relfex Activity

Mechanoreceptors

___________ are stimulated when sound waves vibrate hair cells in the inner ear

Perceptual Level

At which level of the somatosensory system are consciou decisions made about low-grade touch stimuli?

Adaptation

When you first enter a movie theater, the smell of popcorn overwhelms you. Once the movie has ended, however, you don’t notice the popcorn smell. You have experienced_________

A higher frequency of action potentials initated

An intensely painful stimulus is distinguished from a mlidly painful one by:

Autonomic Motor Neurons

Ganglia associated with efferent nerve fibers mostly contian cell bodies of:

PNS neurons are associated with supporting cells that promote rapid cleanup and regrowth of new acons

CNS neurons are associated with oligodendrocytes that contain growth-inhibiting proteins

Differences in regeneration capability between CNS and PNS neurons can mainly be attributed to the fact that:

Vagus

Which cranial nerve is the exception and travels to the thoracic and abdominal cavities?

Facial

Which of the following cranial nerves has both sensory and motor functions?

Sensory; Mixed

The dorsal roots along the spinal cord contain __________ neurons, while the dorsal rami contain__________ neurons.

Only a portion of the left limb will suffer reduced function

Predict the outcome of damage to one cord of the left brachial plexus