BIO 253 EXAMINATION QUESTIONS AND VERIFIED
ANSWERS
Dorsal root has what kind of fibers - Sensory Fibers (afferent)
Venerate Root has what kind of fibers - motor fibers (efferent)
Significance of the phrenic nerve - it's housed in the cervical plexus innervates the
diaphragm
Which plexus houses the ulnar - Brachial plexus
The ramus is - large branches formed after each spinal nerve emerges from the spinal
cavity.
The dorsal ramus supplies somatic motor and sensory fibers to smaller nerves that innervate
the muscles and skin of the posterior surface of the head, neck, and trunk.
Dermatome - Region of the skin surface area supplied by afferent (sensory) fibers of a
given spinal nerve
Myotomes movement - Skeletal muscle or muscles supplied by efferent (motor) fibers of
a given spinal nerve
How many cranial nerves are responsible for eye movement and what are they - 3 they
are Cranial Nerves III, IV, and VI (3,4,6)
cranial nerves - Oh Olfactory SENSORY
Oh Optic SENSORY
Oh Oculomotor MOTOR
To Trochlear MOTOR
Touch Trigeminal MIXED
And Abducens MOTOR
Feel Facial MIXED
Very Vestibulocochlear SENSORY
Good Glossopharyngeal MIXED
Vagina's Vagus MIXED
and Accessory MOTOR
ANSWERS
Dorsal root has what kind of fibers - Sensory Fibers (afferent)
Venerate Root has what kind of fibers - motor fibers (efferent)
Significance of the phrenic nerve - it's housed in the cervical plexus innervates the
diaphragm
Which plexus houses the ulnar - Brachial plexus
The ramus is - large branches formed after each spinal nerve emerges from the spinal
cavity.
The dorsal ramus supplies somatic motor and sensory fibers to smaller nerves that innervate
the muscles and skin of the posterior surface of the head, neck, and trunk.
Dermatome - Region of the skin surface area supplied by afferent (sensory) fibers of a
given spinal nerve
Myotomes movement - Skeletal muscle or muscles supplied by efferent (motor) fibers of
a given spinal nerve
How many cranial nerves are responsible for eye movement and what are they - 3 they
are Cranial Nerves III, IV, and VI (3,4,6)
cranial nerves - Oh Olfactory SENSORY
Oh Optic SENSORY
Oh Oculomotor MOTOR
To Trochlear MOTOR
Touch Trigeminal MIXED
And Abducens MOTOR
Feel Facial MIXED
Very Vestibulocochlear SENSORY
Good Glossopharyngeal MIXED
Vagina's Vagus MIXED
and Accessory MOTOR
