A foreign antigen has entered the body, which has elicited the immune response. A helper T cell binds to an antigen fragment on an antigen-presenting cell. What happens next??
A) ?B cells produce more antibodies.
B) ?A cytotoxic T cell destroys the antigen.
C) ?Free antibodies attach to the antigens.
D) ?A macrophage engulfs the target antigen.
B
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Measuring body weight before and after long bouts of physical activity or hard labor is a valid way to assess fluid loss
Indicate whether statement is true or false.
The medication megestrol acetate ________.
a. relieves depression b. promotes weight loss c. enhances appetite d. stimulates insulin production e. treats dementia
Major calcium loss from the body occurs via feces and urine. Which other process is associated with large losses of calcium??
A) ?hyperventilation B) ?extreme sweating C) ?letting hair grow very long D) ?allowing nails to grow very long
Adults should engage in _____ minutes of vigorous-intensity exercise or _____ minutes of moderate-intensity exercise each week
a. 35; 50 b. 50; 100 c. 75; 150 d. 90; 200 e. 105; 250