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Is the theory that a drug attaches itself to speacialized cells the receptor site theory?
Receptor Site Theory
Can Chemical transmitters stimulate any receptor site to initiate an action?
true
Is a CD4 molecule also a type of antigen?
CD4 is a glycoprotien expressed on the surface of Helper T Cell
What happens to neurotransmitters that fail to attach to a receptor site?
In a process called reuptake, they are reabsorbed by sending the neuron and recycled.
What are dopamine receptor antagonists?
Dopamine receptor antagonists (DAs)-- The older class of antipsychotic medications, also called neuroleptics. These primarily block the site on nerve cells that normally receive the brain chemical dopamine.
Is CD4 an adhesion molecule?
The glycoprotein CD4 is a co-receptor. A co-receptor is "a cell surface receptor, which, when bound to its respective ligand, modulates antigen receptor binding or affects cellular activation after antigen-receptor interactions." (MediLexicon)
What is the function of CD4?
CD4 is a surface receptor expressed by helper T lymphocytes, known as CD4+ T cells. Its purpose is to stablize the interaction between the T cell receptor (on the T cell) and an antigen-bearing MHC Class II molecule (on an antigen presenting cell). Under the right circumstances, this interaction activates CD4+ T cells that recognize an invading pathogen. Activated CD4+ T cells do many things, and are required for a robust adaptive immune response.
Is the theory that a drug attaches itself to speacialized cells the receptor site theory?
Receptor Site Theory
What is the role of CD4 receptores in HIV infections?
The role of the CD4 receptors in HIV is so that the virus fuses with the T helper cells.
What is the voltage change at the receptor site of a neuron?
postsynaptic potential (PSP)
Can Chemical transmitters stimulate any receptor site to initiate an action?
true
What a receptor protein in a membrane that recognizes a chemical signal is most similar to?
the active site of an allosteric enzymein the cyyoplasm that binds to a pecific substrate
Which is a correct association of protein types?
Receptor proteins- have a binding site for a specific molecule
What does anticholinergic mean?
"Anticholinergic" means "that which inhibits the physiological action of acetylcholine at a receptor site".
How proteins are suited for their roles as receptor molecule?
Mark scheme: - Many different sorts of proteins - Different primary structure/sequences of amino acids - Tertiary structure - Shape; allowing formation of receptor/binding site/site into which substrate/substrate fits
Is a CD4 molecule also a type of antigen?
CD4 is a glycoprotien expressed on the surface of Helper T Cell
Why only cd4 ceels are damaged in hiv n cd8 remain safe?
coz CD8 and CD4 are two diffrent types of proteins .. n HIV requires cd4 to fuse for replicatin
