Biology 13.1-13.2 Study Module

Which somatic motor neuron innervates the lateral rectus muscle?

*Abducens nerve (VI)* Trochlear nerve (IV) Optic nerve (II) Oculomotor nerve (III)

Which nerve has the sensory functions of taste in the posterior one-third of the tongue and detecting changes in blood pressure of the carotid artery?

*Glossopharyngeal nerve (IX)* Hypoglossal nerve (XII) Facial nerve (VII) Accessory nerve (XI)

What connects the upper motor neurons to lower motor neurons?

*Interneurons* Muscle fibers Sensory neurons Primary afferent neuron

What connective tissue sheath wraps the axon of a neuron?

Epineurium Fascicle *Endoneurium* Perineurium

Which nerve innervates most of the intrinsic and extrinsic muscles of the tongue?

Facial nerve (VII) Accessory nerve (XI) *Hypoglossal nerve (XII)* Glossopharyngeal nerve (IX)

Which cranial nerve is generally thought of as a mixed nerve?

Hypoglossal nerve (XII) Accessory nerve (XI) Vestibulocochlear nerve (VIII) *Glossopharyngeal nerve (IX)*

The optic nerve is represented by Roman numeral __________.

I *II* VI V

Which is not a motor function of the facial nerve?

Innervate the muscles of facial expressions Trigger the lacrimal (tear) glands over the eye Secretion from certain salivary glands in the mouth *Responsible for swallowing movements*

Which branch is not part of the trigeminal nerve?

Mandibular nerve Maxillary nerve Ophthalmic nerve *Buccal nerve*

Where does the motor portion of the facial nerve (VII) originate?

Midbrain *Nuclei in the pons and medulla* Tongue Cerebral cortex

Which is not a primary function of the oculomotor nerve (III)?

Moves the eye Opens the eye Changes the lens shape *Dilates the pupil*

What two nerves do not arise from the brain stem?

Oculomotor and trochlear nerves Vestibulocochlear and optic nerves *Olfactory and optic nerves* Vestibulocochlear and oculomotor nerves

Which of the following cranial nerves contain axons of motor neurons?

Olfactory (I) Optic (II) Vestibulocochlear (VIII) *Trochlear nerve (IV)*

Which cranial nerve originates as two separate nerves that share a common epineurium, but fuse together after they leave the temporal bone?

Optic (II) Olfactory nerve (I) *Vestibulocochlear (VIII)* Trochlear (IV)

Which cranial nerve detects smell?

Optic nerve (II) Trochlear nerve (IV) *Olfactory nerve (I)* Oculomotor nerve (III)

What nerve is unique in that it has a spinal origin?

Trigeminal (V) Hypoglossal nerve (XII) *Accessory nerve (XI)* Vagus nerve (X)

Axons of these cranial nerves pass through the cribriform foramina of the ethmoid bone.

Vestibulocochlear nerve (VIII) *Olfactory nerve (I)* Hypoglossal (XII) Optic (II)

Which division detects stimuli of the general senses and special senses?

Visceral sensory division Visceral motor division (autonomic nervous system) *Somatic sensory division* Somatic motor division

The vagus nerve is represented by Roman numeral __________.

XII I *X* V

The ________ innervates the throat, anterior neck, and almost all of the thoracic and abdominal viscera.

facial nerve (VII) trigeminal (V) *vagus nerve (X)* hypoglossal nerve (XII)

The ______________ of the peripheral nervous sytems consists of lower motor neurons that directly innervate skeletal muscle fibers.

visceral motor division somatic sensory division visceral sensory division *somatic motor division*

What nerve stimulates the masseter and temporalis muscles to elevate the mandible during mastication and swallowing?

Accessory nerve (XI) Glossopharyngeal nerve (IX) *Trigeminal (V) nerve* Facial nerve (VII)

The sympathetic nervous system and parasympathetic nervous system are divisions of the __________.

somatic motor division *visceral motor division (autonomic nervous system)* visceral sensory division somatic sensory division

Bell's palsy affects the __________ nerve.

*facial nerve* vagus nerve hypoglossal nerve trochlear nerve

Bundles of axons within a nerve are known as __________.

*fascicles* dendrites the perineurium the endoneurium

What is the connective tissue sheath that surrounds a peripheral nerve?

Perineurium Fascicle Endoneurium *Epineurium*

Which of the following houses motor neurons?

Posterior root ganglion *Anterior root of spinal nerve* Central canal of the spinal cord Posterior root of spinal nerve

Where are the sensory neurons found in a spinal nerve?

Posterior root ganglion Anterior root of spinal nerve Central canal of the spinal cord *Posterior root of spinal nerve*

What extraocular muscle does the trochlear nerve (IV) innervate?

Superior rectus muscle Lateral rectus muscle Inferior oblique muscles *Superior oblique muscle*