A population of lymphocytes whose members are all alike and are capable of responding to the same specific antigen is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
clone
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The heme units of old RBCs are converted into ____________________.
transferrin cytochrome urobilins biliverdin none of the choices are correct
Gabrielle was scheduled to have her first set of vaccinations yesterday. Which type of immunity did she acquire?
A. Artificial passive B. Innate C. Natural passive D. Natural active E. Artificial active
The ________ nerve, which arises in the cervical plexus, innervates the diaphragm
A) ansa cervicalis B) lesser occipital C) radial D) phrenic E) sciatic
Which is caused by increased levels of the hormone cholecystokinin?
A. contraction of the sphincter of Oddi B. inhibition of pancreatic enzyme secretion C. contraction of the gallbladder D. secretion of HCO3- from the pancreatic duct cells E. secretion of gastric H+