Answer the following statements true (T) or false (F)
1. The pacinian corpuscle responds to pain.
2. The pacinian corpuscle responds to pressure.
3. The nail body lies hidden in a skinfold called the cuticle.
4. The layer of epithelial tissue directly under the nail is called the nail bed.
5. The crescent-shaped, white area near the root of the nail is called the lunula.
1. FALSE
2. TRUE
3. FALSE
4. TRUE
5. TRUE
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Answer the following statements true (T) or false (F)
1. The iris is actually an involuntary muscle in the choroid layer. 2. In very dim light the circular fibers of the iris contract, causing the pupil to dilate. 3. Presbyopia is a term for the nearsightedness of old age. 4. Cataracts may be caused by exposure to the ultraviolet radiation of the sun. 5. A cataract is a condition in which the cornea becomes less transparent and “milky” in appearance.
Old red blood cells are removed from the blood by macrophages in what organ?
A) kidney B) spleen C) thymus D) bone marrow E) pancreas
The dorsal cavity contains the ____________ cavity and the ____________ cavity.?
Fill in the blank(s) with correct word
Gamma motor neurons
A. innervate the whole muscle. B. regulate the sensitivity of the muscle spindle. C. are located in tendons. D. transmit action potentials to skeletal muscle. E. enable the brain to perceive that a muscle has been stretched.