Identify the mismatched pair
A) receptor proteins—bind to extracellular ligands
B) channel proteins—provide passageway for ions
C) recognition glycoproteins and glycolipids—identify the cell as "self"
D) carrier proteins—allow a cell to move
E) enzymes—speed up chemical reactions
D
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The bony bump immediately posterior to each ear is the ________ process.
Fill in the blank(s) with the appropriate word(s).
During isovolumetric contraction, the atria are in
A. systole. B. diastole.
Select the incorrect statement about connective tissue
a. Bone is an example. b. Blood is an example. c. Elastin may be found in the extracellular material. d. It has tightly-packed cells. e. It is a primary tissue type.
Which describes the action of a ligand's competitive antagonist?
A. It binds to a different binding site on the protein, altering the protein shape so that a ligand cannot bind. B. When present, it increases the binding of a ligand to its receptor. C. It decreases the amount of ligand required to activate the protein. D. It blocks the binding of the ligand to its binding site and prevents activation of the protein.