The Nervous System and Sense Organs Final Test

The final quiz in the fourth unit, The Nervous System and Sense Organs, in the course Animal Anatomy and Physiology 1 at Penn Foster College.

The most common cause of glaucoma is

Insufficient drainage of the aqueous humore

What's the function of the cochlea?

Detects sound

Which statement describes the sympathetic nervous system?

There are three different subtypes of adrenergic receptors on target organs

Rotation of the head is detected primarily by the

semicircular canals

Which of the following cranial nerves contains both sensory and motor functions?

Vagus

The type of tissue that coordinates and controls activities in and around an animal's body is ________ tissue

nervous

Which of the following is connective tissue covering the surface of the brain and spinal cord?

Meninges

Small gaps in the myelin sheath where the axon is exposed to the extracellular environment are called ________

nodes of Ranvier

Cells that support neurons structurally and functionally are called

neuroglia

The middle layer of the eye, called the ________, consists of the ciliary body, the choroid, and the iris/

uvea

Which statement regarding neurotransmission through myelinated and unmyelinated neurons is true?

Neurotransmission is generally faster in myelinated neurons than in unmyelinated neurons

The gustatory sense is dependent on ________ stimulation

chemical

The tapetum is a reflective area on what structure of the eyeball?

Choroid

The tactile sense is the sense of

touch

The space between a neuron and a target cell is called the

synaptic cleft

The __________ nerves are a pair of cranial nerves involved in the sense of smell; these are only sensory and have no motor neurons

olfactory

Near and far vision are accommodated through the muscles of the

ciliary body

Where would an infection associated with otitis externa be found?

The external auditory canal

In domesticated animals, what's the largest part of the brain?

The cerebrum

Which statement describes the depolarization of a nerve?

Ion channels that are normally closed will open, allowing ions to pass through the membrane

Where are neurotransmitters stored?

In synaptic vesicles in the axon

The function of mucus in the nasal cavities is to ________

dissolve odor molecules for detection by the receptor cells

The body relies on ________ sensations to maintain homeostasis, the balance of nutrients and fluids in the body/

visceral

When a/an ________ develops, the lens becomes opaque

cataract

Where are olfactory receptors located?

Upper part of the nasal passages

An upper respiratory tract infection will primarily affect the ________ sense

olfactory

Which of the following describes the correct pathway by which sound is transmitted between the ossicles of the middle ear?

Malleus, incus, stapes

A polarized neuron in its resting state has a ________

high potassium ion concentration on the inside of the cell membrane and a high sodium ion concentration on the outside of the cell membrane

Taste buds are a type of ________

chemoreceptor