A football player is pushed out of bounds from behind. He falls onto his outstretched hand, pushing the humeral head forcefully upward. Which joint and ligaments are affected?
What will be an ideal response?
The upward force of the head of the humerus could cause partial or complete dislocation of the acromioclavicular joint. This is called a shoulder separation. The bones involved include the clavicle, scapula, and humerus, and the stabilizing ligaments involved are the coracoclavicular; acromioclavicular; coraco-acromial, coracohumeral, and glenohumeral ligaments.
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Surfactant
A) protects the surface of the lungs. B) is not found in healthy lung tissue. C) helps prevent the alveoli from collapsing. D) phagocytizes small particulate matter. E) replaces mucus in the alveoli.
The rectus femoris is an example of which muscle shape?
A. Triangular B. Fusiform C. Pennate D. Parallel E. Elongated
A young couple desires to start a family later, but they currently rely on the rhythm method and are uncomfortable with the thought of hormonal contraceptives. What additional form of birth control would you advise them to use?
What will be an ideal response?
Which of the following is a factor on which expiration depends?
A) contraction of expiratory muscles B) decrease in intrapulmonary pressure C) increase in lung volume D) recoil of elastic tissue in the lungs