If you applied a drug which could prevent action potentials to a muscle cell, what would be the result when a motor neuron fired?
A. no contraction since that requires an action potential
B. normal contraction
C. release of calcium outside the muscle cell
D. a graded potential in the neuron
E. None of the answer choices is correct.
A. no contraction since that requires an action potential
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The ubiquitin-proteasome pathway
_____ is used to regulate expression of a number of cell surface receptors. _____ requires only one molecule of ATP to target a protein. _____ targets proteins in a stepwise fashion via ubiquitin ligase adding ubiquitin residues to the protein. _____ is used to digest macromolecules. _____ does not destroy the ubiquitin moiety, but rather cleaves it off for reuse.
Bradykinin causes vasodilation by stimulating the release of what substance from endothelial cells?
A) thromboxane A2 B) nitric oxide C) cyclooxygenase D) arachidonic acid E) endothelin I
Oysters are classified in the phylum
A) Echinodermata. B) Mollusca. C) Annelida. D) Platyhelminthes. E) Arthropoda.
Agglutination tests make use of the fact that
A) antibodies have two antigen-binding sites and will cause clumping when bound to antigen. B) the presence of antibodies in a patient's serum will prevent viral infection of cells in culture. C) a reporter enzyme can be bound to an antibody to provide a visual change with a positive test. D) antibodies bound to antigen will precipitate in a gel matrix. E) T cells will release interferon-gamma during certain infections.