The portions of an antigen to which antibodies bind are the
A) active sites.
B) reactive sites.
C) antigenic determinant sites.
D) antibody active sites.
E) antigen activation segments.
C
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Helium (HE) has an atomic number of 2. It is chemically stable because it
A) is neutral in electrical charge. B) readily ionizes to react with other atoms. C) has a full outer electron shell. D) will form a covalent bond with another He atom. E) lacks electrons, thus the He atom is stable.
Which of the following would contain deoxygenated blood??
A) ?Left ventricle B) ?Aorta C) ?Pulmonary artery D) ?Pulmonary vein
Which of the following is an example of declarative memory?
A. recognition of a person's face and matching a name to it B. remembering how to ride a bicycle C. being able to recall a phone number for only a short period of time D. being given a specific address and being able to recall it several days or weeks later E. responding to the sight, smell, taste, or thought of one's favorite food with salivation and hunger pangs
This term means the return of substances into the blood stream from the filtrate
a) reabsorption b) filtration c) secretion d) excretion e) none of these choices