Receptors and Sensitivity

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Which cranial nerve controls the extrinsic eye muscles that abduct the eyeball?

Abducens (correct)

Optic

Oculomotor

Olfactory

How many pairs of spinal nerves are there in the cervical section of the spinal cord?

8 (correct)

5

12

31

Which nerve innervates the muscles of facial expression?

Glossopharyngeal

Vagus

Vestibulocochlear

Facial (correct)

What is the function of the brachial plexus?

Innervate the upper limb Signup and view all the answers

Which reflex is initiated by a painful stimulus and results in the automatic withdrawal of a threatened body part?

Withdraw reflex Signup and view all the answers

What is the main neurotransmitter released by ANS neurons?

Acetylcholine Signup and view all the answers

Which division of the ANS mobilizes the body during extreme situations?

Sympathetic Signup and view all the answers

What is the function of the sensory neuron in the nervous system?

Transmit afferent impulses to the CNS Signup and view all the answers

Which type of fibers release acetylcholine and are called cholinergic fibers?

Ach-releasing fibers Signup and view all the answers

What is the function of the effector in the nervous system?

Respond to efferent impulses Signup and view all the answers

Which type of cholinergic receptor is always stimulatory?

Nicotinic Signup and view all the answers

Where are Meissner's corpuscles found?

Just beneath the epidermis in the dermal papillae Signup and view all the answers

What type of touch do Meissner's corpuscles respond to?

Discriminative touch Signup and view all the answers

Which type of corpuscles respond to deep pressure?

Pacinian corpuscles Signup and view all the answers

Where are Ruffin's corpuscles located?

In the dermis and subcutaneous tissue Signup and view all the answers

What type of pressure do Ruffin's corpuscles respond to?

Deep and continuous pressure Signup and view all the answers

What do free or naked nerve endings primarily respond to?

Pain and temperature Signup and view all the answers

What are encapsulated dendritic endings composed of?

One or more fiber terminals of sensory neurons enclosed in connective tissue capsule Signup and view all the answers

What are the two types of cholinergic receptors named after?

Drugs that bind them Signup and view all the answers

What are the cranial nerves labeled with?

Roman numerals Signup and view all the answers