Anatomy ch 13

The ulnar, radial, subscapular, and pectoral nerves would be components of the _____ plexus brachial sacral lumbar cervical

Brachial

Every individual has a unique pain perception threshold. T/F

F

Free nerve endings of sensory neurons are rare and found in few locations within the body. T/F

F

Nerves do not regenerate well because they do not have a blood supply. T/F

F

The cranial nerves have either a sensory or a motor function, but never both. T/F

F

____ receptors respond to light (discriminative) touch and low frequency vibrations. Meissner's corpuscles Kinesthetic receptors Ruffini endings Pacinian corpuscles

Meissner's corpuscles

Ventral roots of spinal nerves have ____ functions. Sensory Motor

Motor

The sciatic nerve is part of the ____ plexus. brachial sacral lumbar cervical

Sacral

A dermatome is an area of the skin innervated by the cutaneous branches of a single, spinal nerve. T/F

T

All spinal nerves are mixed nerves. T/F

T

Anosmia is a condition wherein there is a partial or complete loss of the sense of smell. T/F

T

As a rule, mature neurons do not divide (undergo mitosis). T/F

T

Many sensory receptors are capable of adaptation to a recurring stimulus. T/F

T

Muscle spindles that function in coordination of muscle activity are comprised of several intrafusal muscle fibers wrapped in a connective tissue capsule and have central, non-contractile regions. T/F

T

Only ventral rami of spinal nerves form plexuses. T/F

T

Pain originating from the heart might be referred to (and perceived) in the left jaw and neck of an individual. T/F

T

Reciprocal inhibition and activation occur in stretch and tendon reflexes and help to regulate onset and terminations of muscle contractions and relaxations T/F

T

The facial nerve has both sensory and motor functions. T/F

T

Visceral pain results from noxious stimulation of receptors in the thorax and abdominal cavity, and is usually elicited as a dull ache, gnawing, or burning pain. T/F

T

____ receptors give a sustained response to a stimulus with little or no adaptation. tonic phasic

Tonic

Sensory receptors that respond to stimuli such as heat, cold, and pain are termed ____. nociceptors photoreceptors chemoreceptors mechanoreceptors

chemoreceptors

Pairs of spinal nerves innervate all parts of the body except the neck and _____. head hands arms torso

head

The ______ cranial nerve innervates intrinsic and extrinsic muscles of the tongue. facial glossopharyngeal vegus hypoglossal

hypoglossal

Sensory receptors providing information regarding spacial location of body structures would be best termed as ______. interoceptors exteroceptors proprioceptors

proprioceptors

The olfactory cranial nerve has a ____ function. sensory motor

sensory

The cranial nerve that innervates the teeth is the ____ nerve. facial glossopharyngeal trigeminal hypoglossal

trigeminal