Exam #4 - Summer BIOL 223

A spinal nerve ("mixed") nerve contains

• axons and dendrites

• sensory nerve fibers and astrocyte

• oligodendrocytes & motor nerve fibers

• sensory and motor nerve fibers

A drooping upper eyelid could indicate damage to cranial nerve

• I (Olfactory).

• II (Optic).

• III (Oculomotor).

• IV (Trochlear).

The cerebrum is divided into right and left hemispheres by the

• lateral fissure

• longitudinal fissure

• transversal fissure

• precentral gyrus

The part of the brain that has hunger, satiety, and sleep centers; affects activities of the ANS; and plays a role in emotional responses such as rage, pain, and pleasure is the

• medulla

• pons

• hypothalamus

• midbrain

Which cranial nerve innervates the trapezius and sternocleidomastoid muscles?

• XI (Accessory)

• IX (Glossopharyngeal)

• VII (Facial)

• V (Trigeminal)

The major site of processing information and integrating mental processes is the

• ANS (parasympathetic division)

• ANS (sympathetic division)

• CNS

• PNS

Which type of action potential propagation occurs along a myelinated axon?

• continuous

• treppe

• saltatory

• migratory

White matter consists of

• myelinated axon

• unmyelinated axon

• neuron cell bodies

• unmyelinated axons and neuron cell bodies

Nodes of Ranvier are

• interruptions in the myelin sheath along the course of a myelinated axon

• collections of immune cells in the CNS

• satellite cells that support neuron cell bodies in ganglia

• gaps between choroids plexuses where cerebral spinal fluid emerges

Which of the following types of neuroglia are found in the plexus of the ventricles of the brain, and produce cerebrospinal fluid?

• astrocytes

• microglia

• ependymal cells

• oligodendrocytes