In addition to the synthesis of vitamin D, keratinocytes are able to carry out some other biologically important functions. Name at least two of these other functions.
What will be an ideal response?
Keratinocyte enzymes can neutralize carcinogens that penetrate the epidermis. Keratinocytes are also able to convert topical steroid hormones to a powerful anti-inflammatory drug.
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When can erythroblastosis fetalis not possibly happen in the child of an Rh negative mother?
A) if the child is type O positive B) if the child is Rh+ C) if the father is Rh+ D) if the father is Rh-
Which statement is true regarding the location of the trachea?
A. It lies anterior to the esophagus, inferior to the larynx, and inferior to the primary bronchi of the lungs. B. It lies posterior to the esophagus, inferior to the larynx, and superior to the primary bronchi of the lungs. C. It lies superior to the esophagus, inferior to the larynx, and superior to the primary bronchi of the lungs. D. It lies superior to the esophagus, superior to the larynx, and superior to the primary bronchi of the lungs. E. It lies anterior to the esophagus, inferior to the larynx, and superior to the primary bronchi of the lungs.
The single most abundant chemical substance of the body, accounting for 60% to 80% of body weight, is ________.
A) oxygen B) protein C) water D) hydrogen
Which of the following does NOT describe the ANS?
A) a system of motor neurons that innervates smooth and cardiac muscle and glands B) a system of motor neurons that innervates all muscle cells C) general visceral motor system D) involuntary nervous system