The smallest contractile unit in a muscle is a
a. motor unit.
b. muscle fiber.
c. sliding filament.
d. muscle fascicle.
b
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Which of the following blood cell components would be most influenced in a patient with an infection of the tonsils (tonsillitis)?
a. Leukocyte b. Erythrocyte c. Thrombocyte d. Hemoglobin
Crown completion for both the central and lateral incisors is:
A. 3-4 years B. 4-5 years C. 7-8 years D. 10 years
If both the mother and the father are carriers for the cystic fibrosis gene, what are the chances that their child will be a cystic fibrosis carrier?
a. 0% b. 25% c. 50% d. 75%
A middle-aged male is found unconscious at the base of the steps to his house. There is no evidence of trauma and there were no witnesses to the event. You should:
A. stabilize his head and open his airway with the jaw-thrust maneuver. B. apply a cervical collar and open his airway with the tongue-jaw lift. C. apply manual stabilization of his C-spine and gently tilt his head back. D. assess his airway after performing a head-tilt chin-lift maneuver.