Which property of immunity exists when the plasma membrane of each T cell and B cell has receptors that will bind only one particular type of antigen, ignoring all other types of antigens?
A) specificity
B) memory
C) versatility
D) tolerance
E) innate immunity
A) specificity
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When blood pH decreases, which of the following occurs to correct the imbalance?
A. Less CO2 is expelled from the lungs. B. The respiratory center increases the breathing rate. C. The carbonic acid/bicarbonate equation is driven to the right. D. The respiratory center decreases the breathing rate. E. More CO2 is expelled from the lungs.
In a molecule of oxygen gas, the atoms of oxygen share electrons equally with one another. This statement best describes a(n):
A) compound. B) ionic bond. C) polar covalent bond. D) nonpolar covalent bond.
When these ligaments or folds come together, they prevent food from entering the lower respiratory tract
A. vocal folds B. vestibular folds C. cricothyroid ligaments D. epiglottic folds E. vocal folds and vestibular folds
In transamination, the amino group of an amino acid is
A) converted to ammonia. B) converted to urea. C) transferred to a keto acid. D) absorbed by water. E) transferred to acetyl-CoA.