Hair, like the fingernails and toenails, is composed of a fibrous protein called ________.
A. antigen
B. bilirubin
C. collagen
D. keratin
Answer: D
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Mary has been suffering from a "bad knee" for several months. She is a tennis player who often slides in to attack a ball; she is an aerobic devotee and a jogger
She visited an orthopedic surgeon last week who told her that he would "like to have a look at her knee joint." He also told her that her symptoms indicated damage to the meniscus, and it might have to be removed. What will the doctor do to see the joint, and if the meniscus is removed will Mary be able to play tennis again? What will be an ideal response
Which of the following muscles functions to maintain an erect spinal column and head?
A) erector spinae B) biceps brachii C) triceps brachii D) rectus femoris E) biceps femoris
Which of the following does not characterize the sympathetic nervous system?
a. It promotes responses that prepare the body for strenuous physical activity. b. It is part of the autonomic nervous system. c. It has norepinephrine as its postganglionic neurotransmitter. d. It is always excitatory (that is, it increases the activity in every tissue it innervates). e. It is part of the efferent division of the peripheral nervous system.
Both nails and hair are produced by stratum basale of the epidermis
Indicate whether the statement is true or false