Neuroscience Retention Quiz 3

The two major structures of the CNS are the __ and __

brain and spinal cord

The neuron receives input through the __ or __. The signal is transmitted along the __.

dendrite, soma, axon

White matter is white because of the presence of __

myelin sheath

The two fasciculi of the dorsal columns of the spinal cord are the __ fasciculus and __ fasciculus

gracilis and cuneatus

Sensory, motor, or both? ascending fibers of the spinal cord

Sensory

Sensory, motor, or both? descending fibers of the spinal cord

Motor

Sensory, motor, or both? spinal nerve

Both

Sensory, motor, or both? ventral roots of spinal nerve

Motor

Sensory, motor, or both? dorsal roots of spinal nerve

Sensory

True or False? Spinal nerves are lower motor neurons while cranial nerves are upper motor neurons.

False

List the three structures of the brainstem from uppermost to lowermost: __, __, and __

midbrain, pons, medulla

If you take a brain out of the skull and flip it over so that you can see the inferior surface, what other term can be used to describe this surface?

Ventral

When membrane potential goes from -70 mV to +50 mV, what has occurred?

Action potential

During a synapse, what is released into the synaptic cleft? _______

neurotransmitters

Match the following cranial nerves to their functions.

transmits sensation from head and oral cavity

Trigeminal V

Match the following cranial nerves to their functions. moves the vocal folds

Vagus X

Match the following cranial nerves to their functions. Moves the tongue

Hypoglossal XII

Match the following cranial nerves to their functions. Puckers the lips

Facial VII

Match the following cranial nerves to their functions. Moves the velum

Vagus X

Which cranial nerves play a role in movement of the eyeball? 

Oculomotor III, Trochlear IV, and Abducens VI