Exam 17: A: Sense Organs

An itch is caused by a rapidly adapting free nerve ending called a root hair plexus.

Palpebrae is the scientific name for the eyelashes.

Receptors are often described as sensitive axons or end organs.

There are three structurally different taste buds: fungiform,circumvallate,and filiform.

Glaucoma is a disease in which the lens becomes opaque.

A person with 20/100 vision can see objects at 20 feet that a person with normal vision can see at 100 feet.

Special senses tend to be grouped into localized areas.

Muscle spindles are stimulated by excessive muscle contraction.

Aqueous humor is a gelatinous substance that fills the posterior cavity of the eyeball.

The posterior cavity of the eye contains aqueous humor.

Rhodopsin is a photopigment present in rods that is used for night vision.

The sense organs associated with the semicircular canals function in static equilibrium.

The primary mechanism of fibromyalgia seems to be an abnormal amplification of pain information by the central nervous system.

Another term for a cutaneous receptor is an exteroceptor.

The photo pupil reflex is an accommodation process normally used to see objects that are close.

The terms Merkel disk and tactile meniscus refer to the same structure.

The stapes rests on the inner surface of the tympanic membrane,or eardrum.

Proprioceptors are activated by a change in temperature.

Light from red colors causes the breakdown of rhodopsin.

Pain that develops quickly and can be localized easily is called visceral pain.