The mechanisms of action of calcium channel blockers include all of the following, except:
A) They inhibit the entry of calcium into smooth muscle cells.
B) They inhibit the entry of calcium into myocytes.
C) They produce arterial vasoconstriction.
D) They produce arterial vasodilation.
C
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Your patient is a 50-year-old motorcyclist who received a lateral impact from an automobile as he went through an intersection. He has an open right tibia/fibula fracture. He also has a fracture of his left forearm and some abrasions. He was wearing a helmet and suffered no loss of consciousness. He currently has a strong radial pulse of 100, his skin is warm and moist, and he has adequate respirations at 20 per minute. Assuming no significant findings during a rapid trauma exam and intact distal neurovascular status, which of the following is the best way to manage this patient's lower extremity trauma?
A) Use anatomical splinting provided by placing the patient on a long backboard.
B) Secure padded long board splints laterally and medially.
C) Apply PASG.
D) Apply a traction splint.
Molecules are closest together and move most slowly when they are in a(n) ________ state.
A. solid B. liquid C. gaseous D. altered
Bone-building cells are called ________
A) osteoclasts B) osteocytes C) hemopoietics D) osteoblasts
Any injury at the nipple line should be considered a thoracic and abdominal injury because:
A. the liver, spleen, and stomach are completely protected by the ribs. B. the diaphragm may elevate as high as the nipple line upon exhalation. C. penetrating injuries to the upper chest often result in liver lacerations. D. the diaphragm ascends into the chest cavity during the inspiration phase.