What initiates T cell activation?
A) T cell activation begins with the interaction of the T cell with other molecules on the cells called co-stimulators.
B) T cell activation begins when the T cell differentiates into effector cells and memory cells.
C) T cell activation begins when a T cell is ingested by a macrophage.
D) T cell activation begins with a dendritic cell processing and displaying antigen fragments on its MHC molecules.
Answer: D
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The thymus is located posterior to the ____________________ of the sternum.
Fill in the blank(s) with the appropriate word(s).
The term ________ refers to an unhealthy state resulting from inadequate intake of one or more nutrients that becomes life-threatening as the deficiencies accumulate
A) malabsorption B) binging C) purging D) malnutrition E) maladaptation
A person who is suffering from bouts of repeated vomiting may risk developing a serious case of
A) respiratory acidosis. B) metabolic acidosis. C) nephritis. D) respiratory alkalosis. E) metabolic alkalosis.
The renin-angiotensin system in the kidneys helps to regulate:
A. heart rate. B. cardiac contractility. C. blood pressure. D. the release of ADH.