The following are neurotransmitters in the autonomic ganglia: a. GABA b. noradrenaline c. acetylcholine d. 5 HT

The following are neurotransmitters in the autonomic ganglia:
a. GABA
b. noradrenaline
c. acetylcholine
d. 5 HT
by

1 Answer

Answer :

acetylcholine
by

Related questions

The following are neurotransmitters at the autonomic post-ganglionic nerve endings: a. GABA b. noradrenaline c. acetylcholine d. 5 HT

Description : The following are neurotransmitters at the autonomic post-ganglionic nerve endings: a. GABA b. noradrenaline c. acetylcholine d. 5 HT

Last Answer : acetylcholine

The following are true about acetylcholine receptors: a. receptors at all autonomic ganglia are nicotinic b. receptors at the skeletal neuromuscular junction are muscarinic c. acetylcholine receptors in the autonomic ganglia can be selectively blocked by atropine d. acetylcholine receptors in the neuromuscular junction can be selectively blocked by tubocurarine

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Last Answer : acetylcholine receptors in the neuromuscular junction can be selectively blocked by tubocurarine

With regard to the autonomic nervous system: a. the dorsal root ganglia is made up mainly of the cell bodies of the sympathetic nerves b. the preganglionic sympathetic fibres are usually longer than preganglionic parasympathetic fibres c. acetylcholine is the neurotransmitter at the ganglia of both sympathetic and parasympathetic nervous system d. botulin toxin blocks acetylcholine receptors

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Last Answer : the dorsal root ganglia is made up mainly of the cell bodies of the sympathetic nerves

The following are true about the neurotransmitters: a. acetylcholine is inactivated mainly by presynaptic reuptake b. tyrosine is essential for the formation of dopamine c. noradrenaline is inactivated mainly by hydrolysis d. adrenaline is formed from methylation of the noradrenaline

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The following enzymes on the left are responsible for the synthesis of the neurotransmitters on the right: a. monoamine oxidase: noradrenaline b. cholinesterase: acetylcholine c. catechol-o-methyl transferase: dopamine d. dopa decarboxylase: adrenaline

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Muscarinic cholinergic receptors (a) Are located only on parasympathetically innervated effector cells (b) Mediate responses by opening an instrinsic Na+ ion channel (c) Are present on vascular endothelium which has no cholinergic nerve supply (d) Predominate in the autonomic ganglia

Description : Muscarinic cholinergic receptors (a) Are located only on parasympathetically innervated effector cells (b) Mediate responses by opening an instrinsic Na+ ion channel (c) Are present on vascular endothelium which has no cholinergic nerve supply (d) Predominate in the autonomic ganglia

Last Answer : Ans: C

Muscarinic cholinergic receptors: A. Are located only on parasympathetically innervated effector cells B. Mediate responses by opening an intrinsic Na+ ion channel C. Are present on vascular endothelium which has no cholinergic nerve supply D. Predominate in the autonomic ganglia

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Last Answer : C. Are present on vascular endothelium which has no cholinergic nerve supply

The major postjunctional cholinergic receptor is of the muscarinic type at the following site: A. Postganglionic parasympathetic B. Adrenal medulla C. Autonomic ganglia D. Neuromuscular junction

Description : The major postjunctional cholinergic receptor is of the muscarinic type at the following site: A. Postganglionic parasympathetic B. Adrenal medulla C. Autonomic ganglia D. Neuromuscular junction

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Muscarinic cholinergic receptors: A. Are located only on parasympathetically innervated effector cells B. Mediate responses by opening an intrinsic Na+ ion channel C. Are present on vascular endothelium which has no cholinergic nerve supply D. Predominate in the autonomic ganglia

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Last Answer : C. Are present on vascular endothelium which has no cholinergic nerve supply

The major postjunctional cholinergic receptor is of the muscarinic type at the following site: A. Postganglionic parasympathetic B. Adrenal medulla C. Autonomic ganglia D. Neuromuscular junction

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True statements about the following neurotransmitters include: a. dopamine is formed from tyrosine b. in the synapse, noradrenaline is inactivated by active reuptake into the presynpatic terminals c. noradrenaline is formed by hydroxylation of dopamine d. all above

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Parkinson’s disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter (a) acetylcholine (b) norepinephrine (c) dopamine (d) GABA.

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Acetylcholine is a neurotransmitter at: a. sweat glands b. the adrenal medulla c. parasympathetic ganglia d. all above

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Receptor sites for neurotransmitters are present on (a) pre-synaptic membrane (b) tips of axons (c) post-synaptic membrane (d) membranes of synaptic vesicles.

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Receptor sites for neurotransmitters are present on : (1) Pre-synaptic membrane (2) Tips of axons (3) Post-synaptic membrane (4) Membrane of synaptic vesicles

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Pyridoxine deficiency may lead to convulsions as it is needed for the synthesis of (A) GABA (B) PABA (C) EFA (D) SAM

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Pyridoxin deficiency may lead to convulsions as it is needed for the synthesis of (A) GABA (B) PABA (C) EFA (D) SAM

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GABA(gama amino butyric acid) is (A) Post-synaptic excitatory transmitter (B) Post-synaptic inhibitor transmitter (C) activator of glia-cell function (D) inhibitor of glia-cell function

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Anthelmintic action of piperazine is due to: A. Interference with ATP generation in the worm B. Blockade of glucose uptake by the worm C. Hyperpolarization of nematode muscle by GABA agonistic action D. Depolarization of nematode muscle by activating nicotinic receptors

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Strychnine produces convulsions by: A. Stimulating NMDA receptors B. Facilitating the excitatory transmitter glutamate C. Blocking the inhibitory transmitter GABA D. Blocking the inhibitory transmitter glycine

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Gabapentin acts: A. As GABAA agonist B. As precursor of GABA C. By enhancing GABA release D. By GABA independent mechanism

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Which of the following statements is not true of zopiclone: A. It is a nonbenzodiazepine hypnotic with efficacy and safety similar to benzodiazepines B. It does not produce rebound sleep disturbances on discontinuation C. It does not act by potentiating GABA D. It is used to wean off insomniacs from regular benzodiazepine use

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Last Answer : C. It does not act by potentiating GABA

The primary mechanism of action of benzodiazepines is: A. Dopamine antagonism B. Adenosine antagonism C. Opening of neuronal chloride channels D. Facilitation of GABA-mediated chloride influx

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Last Answer : D. Facilitation of GABA-mediated chloride influx

Select the correct statement about benzodiazepines (BZDs): A. All BZDs facilitate GABA mediated Cl¯ influx into neurones B. Different BZDs exert the same degrees of hypnotic, anxiolytic and anticonvulsant actions C. The BZD receptor is homogeneous at all neuronal sites D. The muscle relaxant action of BZDs is not blocked by flumazenil

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Last Answer : A. All BZDs facilitate GABA mediated Cl¯ influx into neurones

The mechanism of action of barbiturates differs from that of benzodiazepines in that they: A. Do not affect the GABA-benzodiazepine receptor-chloride channel complex B. Act as inverse agonists at the benzodiazepine receptor C. Increase the frequency of chloride channel opening without affecting its life time D. Have both GABA-facilitatory as well as GABA-mimetic actions

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Last Answer : D. Have both GABA-facilitatory as well as GABA-mimetic actions

The following is a competitive antagonist of GABA but a noncompetitive antagonist of diazepam: A. Picrotoxin B. Muscimol C. Flumazenil D. Bicuculline

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The following receptor has an intrinsic ion channel: A. Histamine H1 receptor B. Histamine H2 receptor C. Adrenergic alfa receptor D. GABA-benzodiazepine receptor

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The following is a competitive antagonist of GABA but a noncompetitive antagonist of diazepam: A. Picrotoxin B. Muscimol C. Flumazenil D. Bicuculline

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The following receptor has an intrinsic ion channel: A. Histamine H1 receptor B. Histamine H2 receptor C. Adrenergic alfa receptor D. GABA-benzodiazepine receptor

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The 5-HT antagonist that has antihypertensive property is (a) Methysergide (b) Cyproheptadine (c) Ketanserin (d) Ondansetron

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Last Answer : Ans: C

The smooth muscle stimulating action of 5-HT is most marked in the (a) Bronchi (b) Intestines (c) Ureter (d) Billary tract

Description : The smooth muscle stimulating action of 5-HT is most marked in the (a) Bronchi (b) Intestines (c) Ureter (d) Billary tract

Last Answer : Ans: B