MoS SIQnai Transducton Pathway use nels A ig and gatcd tions SCHiO rotciOs Enzyn
ID: 3475114 • Letter: M
Question
MoS SIQnai Transducton Pathway use nels A ig and gatcd tions SCHiO rotciOs Enzynt uated. mo,Receptors. On, ant agot OF ACh seiectively binding toniceti nic- reccptors SElCCtively binding to SCariniC eceptors - thebind ina of ACh tonicotini o Seiectiveiu bind cend Scecticiy binding torsond re o muscannic receptocs E Seiectiveiu C/lf-binding ro-muscarinic ors and and nicotii re .wrn the basilar membray He Cilia OFte hair Calls the teCtorial membran in Spirai organ oe Amchanical enny is Kinctic enera B) hair CCIS dit. permantL tk Flid wae is convcrted ronmuartpotan al s nausea OcCurs celis and no Change öccurs of tu photoreceptor ceiis o% beina releascd bu th photore HA deiCR that monitors te acrivitu tk eve indi Constant flow oF neurotransmitter ells.J This info Tmplies that in a Dina nghtly i CuditorinExplanation / Answer
1. Most cell surface receptors stimulate intracellular target enzymes which may be directly linked or indirectly coupled to receptors by G proteins. These intracellular enzymes serve as downstream signaling elements that propagate and amplify the signal initiated by ligand binding. Most cells hence will invariably use ligands. So A and to a certain extent C is also correct.
2. Atropine is a muscarinic receptor antagonist and selectively binds to M2 receptors and therby prevents the binding of Acl to the receptors and blocking its actions. Hence B is the correct choice.
3. C is the correct choice.
4. B is the correct answer.