What contain receptors for acetylcholine?

What contain receptors for acetylcholine?
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Binding of acetylcholine to its receptors increases the permeability of cell membrane to (A) Ca++ (B) Na+ (C) K+ (D) Na+ and K+

Description : Binding of acetylcholine to its receptors increases the permeability of cell membrane to (A) Ca++ (B) Na+ (C) K+ (D) Na+ and K+

Last Answer : Answer : D

In myasthenia gravis: a. the vertical muscles of the eye are more commonly involved than the horizontal muscles b. the pupil reaction to light is sluggish c. absent antibody to acetylcholine receptors exclude the diagnosis d. Cogan's twitch refers to involuntary twitching of the orbicularis

Description : In myasthenia gravis: a. the vertical muscles of the eye are more commonly involved than the horizontal muscles b. the pupil reaction to light is sluggish c. absent antibody to acetylcholine receptors exclude the diagnosis d. Cogan's twitch refers to involuntary twitching of the orbicularis

Last Answer : the vertical muscles of the eye are more commonly involved than the horizontal muscles

The following are true about acetylcholine: a. it has a strong affinity for nicotinic receptors b. is derived from acetyl CoA and choline c. is synthesized by a reaction involving choline acetyltransferase d. all above

Description : The following are true about acetylcholine: a. it has a strong affinity for nicotinic receptors b. is derived from acetyl CoA and choline c. is synthesized by a reaction involving choline acetyltransferase d. all above

Last Answer : all above

The following are true: a. heroin causes miosis by increasing the release of acetylcholine. b. botulinum toxin causes mydriasis by inhibiting the release of acetylcholine c. phenylephrine causes mydriasis by stimulating the alpha receptors d. amphetamine causes mydriasis by inhibiting noradrenaline reuptake

Description : The following are true: a. heroin causes miosis by increasing the release of acetylcholine. b. botulinum toxin causes mydriasis by inhibiting the release of acetylcholine c. ... mydriasis by stimulating the alpha receptors d. amphetamine causes mydriasis by inhibiting noradrenaline reuptake

Last Answer : phenylephrine causes mydriasis by stimulating the alpha receptors

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

Description : 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. ... atropine d. acetylcholine receptors in the neuromuscular junction can be selectively blocked by tubocurarine

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

Description : 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 ... the ganglia of both sympathetic and parasympathetic nervous system d. botulin toxin blocks acetylcholine receptors

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

Myasthenia Gravis is characterized by Options: 1) Decrease in acetylcholine reserve in motor nerve terminal 2) Decrease in dopamine reserve in motor nerve terminal 3) Decrease in receptors for acetylcholine 4) Decrease in dopamine receptors

Description : Myasthenia Gravis is characterized by Options: 1) Decrease in acetylcholine reserve in motor nerve terminal 2) Decrease in dopamine reserve in motor nerve terminal 3) Decrease in receptors for acetylcholine 4) Decrease in dopamine receptors

Last Answer : Correct Answer: 3) Decrease in receptors for acetylcholine

Select the prokinetic-antiemetic drug which at relatively higher doses blocks both dopamine D2 as well as 5-HT3 receptors and enhances acetylcholine release from myenteric neurones: A. Cisapride B. Prochlorperazine C. Metoclopramide D. Domperidon

Description : Select the prokinetic-antiemetic drug which at relatively higher doses blocks both dopamine D2 as well as 5-HT3 receptors and enhances acetylcholine release from myenteric neurones: A. Cisapride B. Prochlorperazine C. Metoclopramide D. Domperidon

Last Answer : C. Metoclopramide

Activation of the following type of receptors present on myenteric neurones by metoclopramide is primarily responsible for enhanced acetylcholine release improving gastric motility: A. Muscarinic M1 B. Serotonergic 5-HT3 C. Serotonergic 5-HT4 D. Dopaminergic D2

Description : Activation of the following type of receptors present on myenteric neurones by metoclopramide is primarily responsible for enhanced acetylcholine release improving gastric motility: A. Muscarinic M1 B. Serotonergic 5-HT3 C. Serotonergic 5-HT4 D. Dopaminergic D2

Last Answer : C. Serotonergic 5-HT4

Histamine H2 blockers attenuate the gastric secretory response to acetylcholine and pentagastrin as well because: A. H2 blockers block gastric mucosal cholinergic and gastrin receptors as well B. H2 blockers inhibit the proton pump in gastric mucosa C. Acetylcholine and gastrin act partly by releasing histamine in gastric mucosa D. Histamine, acetylcholine and gastrin all act through the phospholipase C-IP3:DAG pathway in gastric mucosa

Description : Histamine H2 blockers attenuate the gastric secretory response to acetylcholine and pentagastrin as well because: A. H2 blockers block gastric mucosal cholinergic and gastrin receptors as well B. H2 ... acetylcholine and gastrin all act through the phospholipase C-IP3:DAG pathway in gastric mucosa

Last Answer : C. Acetylcholine and gastrin act partly by releasing histamine in gastric mucosa

The mechanism by which neostigmine improves contraction of myasthenic muscle involves: A. Repetitive binding of the acetylcholine molecules to the same receptors at the muscle endplate B. Diffusion of acetylcholine released from motor nerve endings to a wider area activating neighbouring receptors C. Activation of motor end-plate receptors by neostigmine molecules themselves D. All of the above

Description : The mechanism by which neostigmine improves contraction of myasthenic muscle involves: A. Repetitive binding of the acetylcholine molecules to the same receptors at the muscle endplate B. Diffusion of ... Activation of motor end-plate receptors by neostigmine molecules themselves D. All of the above

Last Answer : D. All of the above

The mechanism by which neostigmine improves contraction of myasthenic muscle involves: A. Repetitive binding of the acetylcholine molecules to the same receptors at the muscle endplate B. Diffusion of acetylcholine released from motor nerve endings to a wider area activating neighbouring receptors C. Activation of motor end-plate receptors by neostigmine molecules themselves D. All of the above

Description : The mechanism by which neostigmine improves contraction of myasthenic muscle involves: A. Repetitive binding of the acetylcholine molecules to the same receptors at the muscle endplate B. Diffusion of ... Activation of motor end-plate receptors by neostigmine molecules themselves D. All of the above

Last Answer : D. All of the above

With respect to lipoprotein transport and metabolism in the body, the following statements are correct EXCEPT: 1) Arterial walls contain cells with LDL receptors. 2) Cholesterol is required for the formation of red blood cell membranes. 3) Chylomicrons are synthesized in the liver. 4) HDL is assembled in the extracellular space. 5) VLDL transformation to LDL occurs in adipose tissue.

Description : With respect to lipoprotein transport and metabolism in the body, the following statements are correct EXCEPT: 1) Arterial walls contain cells with LDL receptors. 2) Cholesterol is required for the ... is assembled in the extracellular space. 5) VLDL transformation to LDL occurs in adipose tissue.

Last Answer : Answers-3 Chylomicrons are formed in the gut from exogenous triacylglycerols and cholesterol. They are released into the lymph and thereby enter the blood.They are not formed in the liver.

With respect to lipoprotein transport and metabolism in the body, the following statements are correct EXCEPT: 1) Arterial walls contain cells with LDL receptors. 2) Cholesterol is required for the formation of red blood cell membranes. 3) Chylomicrons are synthesized in the liver. 4) HDL is assembled in the extracellular space. 5) VLDL transformation to LDL occurs in adipose tissue.

Description : With respect to lipoprotein transport and metabolism in the body, the following statements are correct EXCEPT: 1) Arterial walls contain cells with LDL receptors. 2) Cholesterol is required for the ... is assembled in the extracellular space. 5) VLDL transformation to LDL occurs in adipose tissue.

Last Answer : Answers-3 Chylomicrons are formed in the gut from exogenous triacylglycerols and cholesterol. They are released into the lymph and thereby enter the blood.They are not formed in the liver.

In which category of muscle fibers, contraction can be regulated by acetylcholine neurotransmitter ?

Description : In which category of muscle fibers, contraction can be regulated by acetylcholine neurotransmitter ?

Last Answer : In which category of muscle fibers, contraction can be regulated by acetylcholine neurotransmitter ? A. ... . Smooth muscle fibers D. all of these

Tyrosine kinase activity is present in (A) Acetylcholine receptor (B) PDGF receptor (C) ADH receptor (D) All of these

Description : Tyrosine kinase activity is present in (A) Acetylcholine receptor (B) PDGF receptor (C) ADH receptor (D) All of these

Last Answer : Answer : B

Zinc is involved in storage and release of (A) Histamine (B) Acetylcholine (C) Epinephrine (D) Insulin

Description : Zinc is involved in storage and release of (A) Histamine (B) Acetylcholine (C) Epinephrine (D) Insulin

Last Answer : Answer : D

Which one of the following can be blocked by atropine? (a) Decreased blood pressure caused by hexamethonium (b) Increased blood pressure caused by nicotine (c) Increased skeleton muscle strength caused by neostigmine (d) Tachycardia caused by exercise (e) Tachycardia caused by infusion of acetylcholine

Description : Which one of the following can be blocked by atropine? (a) Decreased blood pressure caused by hexamethonium (b) Increased blood pressure caused by nicotine (c) Increased skeleton muscle ... by neostigmine (d) Tachycardia caused by exercise (e) Tachycardia caused by infusion of acetylcholine

Last Answer : Ans: E

Which of the following agents is a prodrug that is much less toxic in mammals than in insects ? (a) Acetylcholine (b) Bethanechol (c) Physostigmine (d) Pilocarpine (e) Neostigmine

Description : Which of the following agents is a prodrug that is much less toxic in mammals than in insects ? (a) Acetylcholine (b) Bethanechol (c) Physostigmine (d) Pilocarpine (e) Neostigmine

Last Answer : Ans: C

A direct-acting cholinomimetic that is lipid-soluble and often used in the treatment of glaucoma is (a) Acetylcholine (b) Bethanechol (c) Physostigmine (d) Pilocarpine (e) Neostigmine

Description : A direct-acting cholinomimetic that is lipid-soluble and often used in the treatment of glaucoma is (a) Acetylcholine (b) Bethanechol (c) Physostigmine (d) Pilocarpine (e) Neostigmine

Last Answer : Ans: D

The neurotransmitter agent that is normally released in the sinoatrial node of the heart in response to a blood pressure increase is (a) Acetylcholine (b) Dopamine (c) Epinephrine (d) Glutamate (e) Norepinephrine

Description : The neurotransmitter agent that is normally released in the sinoatrial node of the heart in response to a blood pressure increase is (a) Acetylcholine (b) Dopamine (c) Epinephrine (d) Glutamate (e) Norepinephrine

Last Answer : Ans: A

A mast cell (or mastocyte) is a resident cells of several types of tissues and contains many granules rich in_______. a) Acetylcholine b) Nicotine c) Epinephrine d) Histamine e) Histadine

Description : A mast cell (or mastocyte) is a resident cells of several types of tissues and contains many granules rich in_______. a) Acetylcholine b) Nicotine c) Epinephrine d) Histamine e) Histadine

Last Answer : Ans: D

The muscle fatigue occurs due to the release of (a) acetylcholine (b) lactic acid (c) adrenaline (d) none of these

Description : The muscle fatigue occurs due to the release of (a) acetylcholine (b) lactic acid (c) adrenaline (d) none of these

Last Answer : Ans:(b)

Benzimidazoles work against parasites by A A. Binding with protein tubulin B. Mimicking acetylcholine C. Both D. None of above

Description : Benzimidazoles work against parasites by A A. Binding with protein tubulin B. Mimicking acetylcholine C. Both D. None of above

Last Answer : Binding with protein tubuli

Nicotine acts as a stimulant, because it mimics the effect of(a) testosterone (b) dopamine (c) thyroxine (d) acetylcholine.

Description : Nicotine acts as a stimulant, because it mimics the effect of (a) testosterone (b) dopamine (c) thyroxine (d) acetylcholine.

Last Answer : (d) acetylcholine.

The following are true about pupil reaction to light: a. secretion of acetylcholine is responsible for pupil dilatation b. constriction of the pupil is mediated by nerve fibres travelling in the short ciliary nerve c. dilatation of the pupil is mediated by nerve fibres travelling in the long ciliary nerve d. the sympathetic nerve innervates the dilator muscles

Description : The following are true about pupil reaction to light: a. secretion of acetylcholine is responsible for pupil dilatation b. constriction of the pupil is mediated by nerve fibres travelling in ... fibres travelling in the long ciliary nerve d. the sympathetic nerve innervates the dilator muscles

Last Answer : the sympathetic nerve innervates the dilator muscles

The release of acetylcholine is blocked by: a. hemicholinum b. venom of black widow spidec. cocaine d. botulinum toxins r

Description : The release of acetylcholine is blocked by: a. hemicholinum b. venom of black widow spider c. cocaine d. botulinum toxins

Last Answer : botulinum toxins

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

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

Last Answer : acetylcholine

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 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

Description : 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

Last Answer : adrenaline is formed from methylation of the noradrenaline

The following are true about acetylcholine: a. it is synthesized from acetyl-coenzyme A and choline b. its formation is catalysed by acetylcholinesterase c. at the synaptic cleft, it is inactivated by hydrolysis d. reuptake by the presynaptic neurones play an important in inactivating acetylcholine

Description : The following are true about acetylcholine: a. it is synthesized from acetyl-coenzyme A and choline b. its formation is catalysed by acetylcholinesterase c. at the synaptic cleft, ... inactivated by hydrolysis d. reuptake by the presynaptic neurones play an important in inactivating acetylcholine

Last Answer : at the synaptic cleft, it is inactivated by hydrolysis

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

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

Last Answer : all above

The secretion of insulin is stimulated by: a. adrenaline b. somatostatin c. fatty acids d. acetylcholine

Description : The secretion of insulin is stimulated by: a. adrenaline b. somatostatin c. fatty acids d. acetylcholine

Last Answer : fatty acids

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

Description : 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

Last Answer : dopa decarboxylase: adrenaline

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.

Description : 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.

Last Answer : c) dopamine

Which one of the following does not act as a neurotransmitter? (a) Cortisone (b) Acetylcholine (c) Epinephrine (d) Norepinephrine

Description : Which one of the following does not act as a neurotransmitter? (a) Cortisone (b) Acetylcholine (c) Epinephrine (d) Norepinephrine

Last Answer : (a) Cortisone

Alzheimer’s disease in humans is associated with the deficiency of (a) glutamic acid (b) acetylcholine (c) gamma aminobutyric acid (GABA) (d) dopamine.

Description : Alzheimer’s disease in humans is associated with the deficiency of (a) glutamic acid (b) acetylcholine (c) gamma aminobutyric acid (GABA) (d) dopamine.

Last Answer : b) acetylcholine

Nicotinic action of acetylcholine is blocked by the drug (A) Atropine (B) Carvedilol (C) Neostigmine ( D ) d-Tubocurarine

Description : Nicotinic action of acetylcholine is blocked by the drug (A) Atropine (B) Carvedilol (C) Neostigmine ( D ) d-Tubocurarine

Last Answer : ( D ) d-Tubocurarine

The mechanisms involved in the causation of dangerous cardiac arrhythmias due to overdose of tricyclic antidepressants include the following except: A. Intraventricular conduction block B. Potentiation of noradrenaline C. Antagonism of acetylcholine D. Increased vagal tone

Description : The mechanisms involved in the causation of dangerous cardiac arrhythmias due to overdose of tricyclic antidepressants include the following except: A. Intraventricular conduction block B. Potentiation of noradrenaline C. Antagonism of acetylcholine D. Increased vagal tone

Last Answer : D. Increased vagal tone

Dantrolene sodium reduces skeletal muscle tone by: A. Reducing acetylcholine release from motor nerve endings B. Suppressing spinal polysynaptic reflexes C. Inhibiting the generation of muscle action potential D. Reducing Ca2+ release from sarcoplasmic reticulum in the muscle fibre

Description : Dantrolene sodium reduces skeletal muscle tone by: A. Reducing acetylcholine release from motor nerve endings B. Suppressing spinal polysynaptic reflexes C. Inhibiting the generation of muscle action potential D. Reducing Ca2+ release from sarcoplasmic reticulum in the muscle fibre

Last Answer : D. Reducing Ca2+ release from sarcoplasmic reticulum in the muscle fibre

The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind acetylcholine B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules C. Phosphorylation results in rapid degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Description : The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind ... degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Last Answer : B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules

Acetylcholine has no therapeutic application because: A. None of its actions are beneficial in any condition B. Its effects are transient C. It produces wide spread actions affecting many organs D. Both ‘B’ and ‘C’ are correct

Description : Acetylcholine has no therapeutic application because: A. None of its actions are beneficial in any condition B. Its effects are transient C. It produces wide spread actions affecting many organs D. Both ‘B’ and ‘C’ are correct

Last Answer : D. Both ‘B’ and ‘C’ are correct

Which of the following secretions is not stimulated by acetylcholine: A. Tear B. Bile C. Pancreatic juice D. Sweat

Description : Which of the following secretions is not stimulated by acetylcholine: A. Tear B. Bile C. Pancreatic juice D. Sweat

Last Answer : B. Bile

Pseudocholinesterase differs from true cholinesterase in that: A. It does not hydrolyse acetylcholine B. It hydrolyses acetylcholine at a slower rate C. It is more susceptible to inhibition by physostigmine D. It is the only form of circulating cholinesterase

Description : Pseudocholinesterase differs from true cholinesterase in that: A. It does not hydrolyse acetylcholine B. It hydrolyses acetylcholine at a slower rate C. It is more susceptible to inhibition by physostigmine D. It is the only form of circulating cholinesterase

Last Answer : B. It hydrolyses acetylcholine at a slower rate

Tetrodotoxin blocks nerve impulse/junctional transmission by: A. Anticholinergic action B. Depleting acetylcholine C. Blocking Na+ channels D. Blocking Ca2+ channels

Description : Tetrodotoxin blocks nerve impulse/junctional transmission by: A. Anticholinergic action B. Depleting acetylcholine C. Blocking Na+ channels D. Blocking Ca2+ channels

Last Answer : C. Blocking Na+ channels

The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind acetylcholine B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules C. Phosphorylation results in rapid degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Description : The organophosphates produce irreversible inhibition of cholinesterase because: A. They bind to an allosteric site of the enzyme resulting in unfavourable conformation of esteratic site to bind ... degradation of enzyme molecules D. They are neither metabolized nor excreted from the body

Last Answer : B. Regeneration time of the phosphorylated enzyme is longer than the turnover time of the enzyme molecules

Acetylcholine has no therapeutic application because: A. None of its actions are beneficial in any condition B. Its effects are transient C. It produces wide spread actions affecting many organs D. Both ‘B’ and ‘C’ are correct

Description : Acetylcholine has no therapeutic application because: A. None of its actions are beneficial in any condition B. Its effects are transient C. It produces wide spread actions affecting many organs D. Both ‘B’ and ‘C’ are correct

Last Answer : D. Both ‘B’ and ‘C’ are correct

Which of the following secretions is not stimulated by acetylcholine: A. Tear B. Bile C. Pancreatic juice D. Sweat

Description : Which of the following secretions is not stimulated by acetylcholine: A. Tear B. Bile C. Pancreatic juice D. Sweat

Last Answer : B. Bile

Pseudocholinesterase differs from true cholinesterase in that: A. It does not hydrolyse acetylcholine B. It hydrolyses acetylcholine at a slower rate C. It is more susceptible to inhibition by physostigmine D. It is the only form of circulating cholinesterase

Description : Pseudocholinesterase differs from true cholinesterase in that: A. It does not hydrolyse acetylcholine B. It hydrolyses acetylcholine at a slower rate C. It is more susceptible to inhibition by physostigmine D. It is the only form of circulating cholinesterase

Last Answer : B. It hydrolyses acetylcholine at a slower rate

Tetrodotoxin blocks nerve impulse/junctional transmission by: A. Anticholinergic action B. Depleting acetylcholine C. Blocking Na+ channels D. Blocking Ca2+ channels

Description : Tetrodotoxin blocks nerve impulse/junctional transmission by: A. Anticholinergic action B. Depleting acetylcholine C. Blocking Na+ channels D. Blocking Ca2+ channels

Last Answer : C. Blocking Na+ channels