Which statement about nicotinic acetylcholine receptors (nAChRs) is true? Group of answer choicesEach nAChR is composed of seven different protein subunits.They are ionotropic receptors and conduct Na+ and Ca2+ ions across the cell membrane causing depolarization and a fast excitatory response.They are ionotropic receptors and conduct Cl- ions across the cell membrane, causing depolarization and a fast excitatory response.They are found in all areas of the nervous system except the brain.

Muscarinic and nicotinic receptors are receptors for which neurotransmitter?Multiple choice question.norepinephrineepinephrineacetylcholine

Select all that applyWhere are nicotinic receptors found?Multiple select question.On effectors innervated by sympathetic postganglionic neurons.On postganglionic neurons in parasympathetic pathways.On effectors innervated by parasympathetic postganglionic neurons.On postganglionic neurons in sympathetic pathways.

The acetylcholine receptor at the neuromuscular junction would best be described as a(n)Group of answer choiceschannel-linked receptor.enzyme-linked receptor.G-protein-coupled receptor.nuclear receptor.gap junction.

About acetylcholine, all the following is true excepta. Its synthesis is catalyzed by the choline acetyltransferase enzymeb. Its muscarinic actions can be blocked by atropine. c. Its nicotinic actions can be large doses of nicotined. It is not secreted by any symp. Postgang. Nerve fibres

Which of the following receptors is correctly identified asan ionotropic or a GPCR and correctly paired with the ionicchanges and/or second messenger induced by the binding of anagonist?A. 5-HT1A receptors are GPCRs whose activation increases IP3and DAG and increases K+ conduction.B. Nicotinic receptors are ionotropic receptors whose activationdecreases Na+ and K+ conduction.C. GABAA receptors are GPCRs whose activation increasescAMP and decreases K+ conduction.D. NMDA receptors are ionotropic receptors whose activationincreases Na+, K+, and Ca2+ conductance.E. Glycine receptors are GPCRs whose activation increases IP3and DAG and increases K+ conductance