Daniella has been diagnosed with Addison's disease. Which of the following does NOT match her signs or symptoms?
A) bronze skin tone
B) high blood pressure and edema
C) weak muscles
D) hypoglycemia
E) inability to cope with stress
Ans: B) high blood pressure and edema
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In a laboratory experiment you have treated a muscle cell with a calcium channel blocker. The membrane still depolarizes, but the concentration of calcium never increases in the cytosol. Which of the following describes what will happen next?
A. Contraction will occur, but the muscle will be stuck in the contracted state and unable to relax. B. Tropomyosin will continue to cover the myosin binding sites on actin and no cross-bridges will form. C. Only one cross-bridge cycle will occur but no second cycle. D. Binding of myosin to actin will take place. E. A single twitch in skeletal muscle but no sustained contraction.
Some antibodies cross the placenta
Indicate whether this statement is true or false.
Which of the following is NOT a member of the hamstrings?
A) gracilis B) semitendinosus C) semimembranosus D) biceps femoris
Portions of bacteria, viruses, molds, parasites, and cancer cells that cause specific responses from the immune system are called
A. antigens. B. interferons. C. antibodies. D. macrophages.