All of the following are true of epidermal ridges except that they
A) extend into the dermis.
B) contain increased numbers of free nerve endings.
C) cause ridge patterns on the surface of the skin.
D) produce patterns that are determined genetically.
E) interconnect with the dermal papillae.
Answer: B
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An abnormal collection of fluid within the testes is called ________
A) Cryptorchidism B) Hydrocele C) Prostatitis D) None of the above
Normal venous PO2 is ________.
A. 100 mm Hg B. 46 mm Hg C. 40 mm Hg D. 85 mm Hg
All of the following are examples of positive feedback, except
A) blood clot formation. B) release of chemicals from the blood vessels after injury. C) decrease bleeding after injury. D) increase heart rate after blood loss. E) relaxation of smooth muscles' blood vessels when body temperature goes up.
The effectiveness of positive-pressure ventilations when treating a head-injured patient can ONLY be determined by:
A. immediate reassessment following the intervention. B. a neurosurgeon or emergency department physician. C. reassessing the patient's blood pressure after at least 10 minutes. D. noting a decrease in the heart rate during ventilations.