Which of the following is used as anaesthetics? (1) N2 (2) N2O (3) CHI (4) CO2

Which of the following is used as anaesthetics? (1) N2 (2) N2O (3) CHI (4) CO2
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(2) N2O Explanation: Nitrous oxide (N2O) is a colorless, odorless gas that is used as an anesthetic and analgesic. It is used in surgery and dentistry for its anaesthetic and analgesic effects. It is known as "laughing gas" due to the euphoric effects of inhaling it, a property that has led to its recreational use as a dissociative anaesthetic.
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Name the drugs which block the sensory nerves and prevent the patient from feeling pain? A. Analgesics B. Antibiotics C. Antihistamines D. Anaesthetics (Answer)

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The pain sensation a. arises from stimulation of free nerve endings b. is transmitted to the central nervous system by unmyelinated C fibres c. is transmitted to the brain via the spinothalamic tracts d. is reduced by local anaesthetics through reduction of the potassium influx into the nerve fibres

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Last Answer : is transmitted to the brain via the spinothalamic tracts

. Riboflavin is a/an (A) Vitamin (B) Analgesic drug (C) Anaesthetics (D) Anti-malarial drug

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As far as surgical removal of wisdom teeth is concerned which of the following is true? a- Prophylactic prescription of antibiotic reduces dramatically the chances of infection. b- Raising a lingual flap will increases the incidence of neurapraxia but will reduce the incidence of neurotmesis with respect to the lingual nerve. c- Prophylactic prescription of dexamethasone will dramatically reduce post operative swelling. d- Inferior dental nerve injury is unlikely since the nerve passes medial to the wisdom tooth root. e- The use of vasoconstrictors in local anaesthetics will increase the chances of infection.

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Last Answer : b- Raising a lingual flap will increases the incidence of neurapraxia but will reduce the incidence of neurotmesis with respect to the lingual nerve.

Which of the following local anaesthetics is indicated in case of the need to long acting one after a surgical operation, A. Lidocaine B. Mepivacaine C. Bupivacaine (Marcaine)

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As far as surgical removal of wisdom teeth is concerned, which of the following is true?**CHECK A. Prophylactic prescription of antibiotic reduces dramatically the chances of infection B. Raising a lingual flap will increases the incidence of neurapraxia but will reduce the incidence of neurotmesis with respect to the lingual nerve ADC M07 C. Prophylactic prescription of dexamethasone will dramatically reduces post operative swelling D. Inferior dental nerve injury is unlikely since the nerve passes medial to the wisdom tooth root E. The use of vasoconstrictors in local anaesthetics will increase the chances of infection.

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Last Answer : C. Prophylactic prescription of dexamethasone will dramatically reduces post operative swelling

Select the correct statement about nitrous oxide: A. It irritates the respiratory mucosa B. It has poor analgesic action C. It is primarily used as a carrier and adjuvant to other anaesthetics D. It frequently induces post anaesthetic nausea and retching

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Last Answer : C. It is primarily used as a carrier and adjuvant to other anaesthetics

General anaesthetics produce immobility in response to painful surgical stimuli by acting primarily at the: A. Motor cortex B. Basal ganglia C. Thalamus D. Spinal cord

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Toxicity of local anaesthetics involves the following organs except: A. Heart B. Brain C. Kidney D. Skin and subcutaneous tissue

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Last Answer : D. Dibucaine

Which of the following is not the reason for greater susceptibility of smaller sensory fibres to blockade by local anaesthetics than larger motor fibres: A. Sensory fibres are inherently more sensitive than motor fibres B. More slender fibres have shorter internodal distances C. Small sensory fibres generate higher frequency longer lasting action potential D. Smaller fibres have shorter critical lengths for blockade

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Last Answer : A. Sensory fibres are inherently more sensitive than motor fibres

Local anaesthetics block nerve conduction by: A. Blocking all cation channels in the neuronal membrane B. Hyperpolarizing the neuronal membrane C. Interfering with depolarization of the neuronal membrane D. Both ‘B’ and ‘C’ are correct

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Last Answer : C. Interfering with depolarization of the neuronal membrane

The following is not true of local anaesthetics: A. The local anaesthetic is required in the unionized form for penetrating the neuronal membrane B. The local anaesthetic approaches its receptor only from the intraneuronal face of the Na+ channel C. The local anaesthetic binds to its receptor mainly when the Na+ channel is in the resting state D. The local anaesthetic combines with its receptor in the ionized cationic form

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Last Answer : C. The local anaesthetic binds to its receptor mainly when the Na+ channel is in the resting state

The local anaesthetics having amide linkage differ from those having ester linkage in that the amidelinked local anaesthetics: A. Are not surface anaesthetics B. Have a shorter duration of action C. Are degraded in the plasma D. Do not show cross-sensitivity with esterlinked local anaesthetic

Description : The local anaesthetics having amide linkage differ from those having ester linkage in that the amidelinked local anaesthetics: A. Are not surface anaesthetics B. Have a shorter duration of action C. Are degraded in the plasma D. Do not show cross-sensitivity with esterlinked local anaesthetic

Last Answer : D. Do not show cross-sensitivity with esterlinked local anaesth

The clinically used local anaesthetics have the following common features except: A. They are amphiphilic weak bases B. They are used for surgery in non-cooperative patients C. In their use, care of vital functions is generally not needed D. They are safer than general anaesthetics in patients with respiratory and cardiovascular disease

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Last Answer : B. They are used for surgery in non-cooperative patients

Is N2O a heterogeneous?

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Last Answer : Compound, not a mixture

How many moles of N are in 0.223 g of N2O?

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Last Answer : The number of nitrogen moles is 0,01.

Oxygen has (+) oxidation number only in – (1) OF2 (2) Cl2O (3) H2O (4) N2O

Description : Oxygen has (+) oxidation number only in – (1) OF2 (2) Cl2O (3) H2O (4) N2O

Last Answer : (1) OF2 Explanation: In case of F2O, oxygen is not the most electronegative element. The fluorine is more electronegative and has an oxidation state of -1. In this case, the oxygen has an oxidation state of +2.