Peripheral Nervous System

Interactive Lecture

​

​Peripheral Nervous System

Multiple Choice

Which of the following structures is included in the Peripheral Nervous System (PNS)?

• Brain

• Spinal cord

• Sensory receptors

• Cerebellum

Multiple Choice

Which type of nerve endings are responsible for detecting pain and temperature?

• Encapsulated endings

• Free nerve endings

• Receptor cells

• Lamellated corpuscles

Multiple Choice

Which of the following is an example of an encapsulated nerve ending?

• Pain receptors

• Temperature receptors

• Lamellated (Pacinian) corpuscles

• Rods

Multiple Choice

Proprioceptors are primarily responsible for detecting:

• Pain and temperature

• Light and sound

• Stretch or movement in skeletal muscles and joint tissues

• Pressure and vibration

Fill in the Blank

Proprioceptors contribute to both conscious and unconscious _________, allowing the brain to be aware of the body's position and movement for coordinated actions (conscious) and maintaining balance and posture without conscious effort (unconscious).

Match

Match the type of sensory receptor with its function.

• Chemoreceptors

• Mechanoreceptors

• Thermoreceptors

• Photoreceptors

• Nociceptors

Detect chemical changes

Sense mechanical forces

Detect temperature changes

Respond to light

Sense pain stimuli

• Detect chemical changes

• Sense mechanical forces

• Detect temperature changes

• Respond to light

• Sense pain stimuli

Match

Match the connective tissue layer with what it surrounds.

• Epineurium

• Endoneurium

• Perineurium

Surrounds entire nerve

Encloses individual axons

Encases nerve fascicles

• Surrounds entire nerve

• Encloses individual axons

• Encases nerve fascicles

Multiple Choice

Which type of ganglia contains unipolar neuron cell bodies?

• Sympathetic ganglia

• Parasympathetic ganglia

• Dorsal root ganglia

• Cranial nerve ganglia

Multiple Choice

What type of neuron cell bodies are found in sympathetic ganglia?

• Unipolar neurons

• Bipolar neurons

• Multipolar neurons

• Pseudounipolar neurons

Multiple Choice

Which type of nerve carries impulses toward the central nervous system?

• Motor (efferent) nerves

• Mixed nerves

• Sensory (afferent) nerves

• Autonomic nerves

Multiple Choice

Motor (efferent) nerves are responsible for:

• Transmitting sensory information to the brain

• Carrying impulses away from the central nervous system to muscles and glands

• Integrating sensory and motor functions

• Controlling involuntary functions

Fill in the Blank

Nerves that carry both sensory and motor fibers are classified as __________ nerves.

Multiple Choice

How many pairs of cranial nerves are associated with the brain?

• 10

• 12

• 14

• 16

Multiple Choice

Which mnemonic helps remember the names of the cranial nerves?

• "Some say money matters, but my brother says big brains matter most"

• "Oh, once one takes the anatomy final, very good vacations are heavenly"

• "Every good boy does fine"

• "Please excuse my dear aunt Sally"

Multiple Choice

Which mnemonic helps remember the functions of the cranial nerves?

• "Some say money matters, but my brother says big brains matter most"

• "Oh, once one takes the anatomy final, very good vacations are heavenly"

• "Every good boy does fine"

• "Please excuse my dear aunt Sally"

Multiple Choice

Which cranial nerve is involved in controlling most of the eye's movements, including constriction of the pupil?

• Oculomotor nerve (III)

• Trochlear nerve (IV)

• Abducens nerve (VI)

• Facial nerve (VII)

Multiple Choice

Which cranial nerve is involved in controlling most of the eye's movements, including constriction of the pupil?

• Oculomotor nerve (III)

• Trochlear nerve (IV)

• Abducens nerve (VI)

• Facial nerve (VII)

Multiple Choice

Which cranial nerve controls the superior oblique muscle, which is involved in downward and lateral eye movement?

• Oculomotor nerve (III)

• Trochlear nerve (IV)

• Abducens nerve (VI)

• Facial nerve (VII)

Multiple Choice

The trigeminal nerve (Cranial Nerve V) is primarily responsible for:

• Controlling facial expressions

• Transmitting sensory information from the face and controlling muscles for chewing

• Controlling tongue movement

• Hearing and balance

Multiple Choice

Which cranial nerve is responsible for lateral eye movement by innervating

the lateral rectus muscle?

• Abducens nerve (VI)

• Oculomotor nerve (III)

• Trochlear nerve (IV)

• Facial nerve (VII)

Multiple Choice

Which cranial nerve is responsible for taste from the posterior one-third of the tongue

and for swallowing?

• Hypoglossal nerve (XII)

• Glossopharyngeal nerve (IX)

• Facial nerve (VII)

• Vagus nerve (X)

Multiple Choice

The vagus nerve (Cranial Nerve X) primarily controls which of the

following bodily functions?

• Eye movement

• Taste from the anterior tongue

• Autonomic control of the heart, lungs, and digestive tract

• Hearing and balance

Multiple Choice

The accessory nerve (Cranial Nerve XI) controls which muscles?

• Muscles of mastication

• Muscles of the pharynx

• Sternocleidomastoid and trapezius muscles

• Extraocular muscles

Multiple Choice

Where does sensory information enter the spinal cord?

• Ventral root

• Dorsal root

• Ventral horn

• Central canal

Fill in the Blank

Motor information exits the spinal cord through the _______ ____, which carries motor signals from the central nervous system to the muscles and glands.

Multiple Choice

Which spinal nerve group does not contribute to nerve plexuses?

• Cervical nerves

• Thoracic nerves T2-T12

• Lumbar nerves

• Sacral nerves

Fill in the Blank

The _______ nerve, which arises from the cervical plexus (specifically from C3-C5), is crucial for breathing as it innervates the diaphragm, the primary muscle involved in respiration.

Fill in the Blank

The _______ nerve, which arises from the brachial plexus, innervates the deltoid and teres minor muscles, which are involved in shoulder movement.

Fill in the Blank

Carpal tunnel syndrome occurs when the ______ nerve, which passes through the carpal tunnel in the wrist, becomes compressed or irritated. This compression can lead to symptoms such as numbness, tingling, weakness, and pain in the hand and fingers, particularly affecting the thumb, index, middle, and part of the ring finger. The condition is often associated with repetitive hand movements, wrist anatomy, or other underlying health conditions.

Multiple Choice

Which nerve from the lumbar plexus is primarily responsible for innervating the anterior thigh muscles, including the quadriceps?

• Sciatic nerve

• Femoral nerve

• Obturator nerve

• Tibial nerve

Multiple Choice

What is the primary function of the obturator nerve?

• Innervating the quadriceps muscles

• Innervating the adductor muscles of the thigh

• Controlling hip flexion and knee extension

• Innervating the gluteal muscles

Multiple Choice

Which nerve is the largest and longest nerve in the body, originating from the sacral plexus?

• Femoral nerve

• Tibial nerve

• Common fibular nerve

• Sciatic nerve

Poll

How ready are you to dissect a sheep's eyeball?