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Medical MCQs with Explanations

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3391MedicalMedium

Primordial cyst develops:________?

AIn teeth in which crown development is completed

BIn place of missing teeth

CIn mandibular body

DIn periapical region

Correct answer

B. In place of missing teeth

Explanation

The correct answer is In place of missing teeth.

3392MedicalMedium

Which of the following events DO NOT occur in rods in response to light________?

AOpening of Na+ channels

BActivation of transducin

CStructural changes in rhodopsin

DDecreased intracellular cGMP

Correct answer

A. Opening of Na+ channels

Explanation

The correct answer is Opening of Na+ channels.

3393MedicalMedium

For a bacterium to be seriously considered in the etiology of dental caries, it must________?

AProduce extracellular amylopectins

BProduce intracellular dextrans

CExist regularly in the dental plaque

DBe lethal for gnotobiotic animals

Correct answer

C. Exist regularly in the dental plaque

Explanation

The correct answer is Exist regularly in the dental plaque.

3394MedicalMedium

Lymphocytes are located in each of the following tissues or organs EXCEPT one. The one exception is________?

ASpleen

BLymph nodes

CBrain

DThymus gland

Correct answer

C. Brain

Explanation

The correct answer is Brain.

3395MedicalMedium

Antischkow cells are present in all of the following conditions except________?

AApthous ulcer

BSickle cell anaemia

CHerpes simplex

DIron deficiency anaemia

Correct answer

C. Herpes simplex

Explanation

The correct answer is Herpes simplex.

3396MedicalMedium

Which hormone, together with the catecholamines enhances the tone of vascular smooth muscle and assists in elevating blood pressure?

AParathyroid hormone

BGlucagon

CCortisol

DThyroxine

Correct answer

C. Cortisol

Explanation

The correct answer is Cortisol.

3397MedicalMedium

Main arterial supply to the tongue is________?

AFacial artery

BAscending palatine artery

CLingual artery

DAscending pharyngeal artery

Correct answer

C. Lingual artery

Explanation

The correct answer is Lingual artery.

3398MedicalMedium

A distinict advantage that tetracyclines have over penicillins is that tetracyclines________?

AHave a wider range of antibacterial activity

BAre safer to use during pregnancy

CDo not cause superinfections

DHave no side effects

Correct answer

A. Have a wider range of antibacterial activity

Explanation

The correct answer is Have a wider range of antibacterial activity.

3399MedicalMedium

The most common cause of TMJ ankylosis is________?

ARheumatoid arthritis

BOsteoarthritis

CChildhood illness

DTrauma

Correct answer

D. Trauma

Explanation

The correct answer is Trauma.

3400MedicalMedium

Brush border is seen in________?

AProximal convoluted tubule

BDistal convoluted tubule

CLoop of Henle

DBowman’s capsule

Correct answer

A. Proximal convoluted tubule

Explanation

The correct answer is Proximal convoluted tubule.

3391MedicalMedium

Primordial cyst develops:________?

AIn teeth in which crown development is completed

BIn place of missing teeth

CIn mandibular body

DIn periapical region

Correct answer

B. In place of missing teeth

Explanation

The correct answer is In place of missing teeth.

3392MedicalMedium

Which of the following events DO NOT occur in rods in response to light________?

AOpening of Na+ channels

BActivation of transducin

CStructural changes in rhodopsin

DDecreased intracellular cGMP

Correct answer

A. Opening of Na+ channels

Explanation

The correct answer is Opening of Na+ channels.

3393MedicalMedium

For a bacterium to be seriously considered in the etiology of dental caries, it must________?

AProduce extracellular amylopectins

BProduce intracellular dextrans

CExist regularly in the dental plaque

DBe lethal for gnotobiotic animals

Correct answer

C. Exist regularly in the dental plaque

Explanation

The correct answer is Exist regularly in the dental plaque.

3394MedicalMedium

Lymphocytes are located in each of the following tissues or organs EXCEPT one. The one exception is________?

ASpleen

BLymph nodes

CBrain

DThymus gland

Correct answer

C. Brain

Explanation

The correct answer is Brain.

3395MedicalMedium

Antischkow cells are present in all of the following conditions except________?

AApthous ulcer

BSickle cell anaemia

CHerpes simplex

DIron deficiency anaemia

Correct answer

C. Herpes simplex

Explanation

The correct answer is Herpes simplex.

3396MedicalMedium

Which hormone, together with the catecholamines enhances the tone of vascular smooth muscle and assists in elevating blood pressure?

AParathyroid hormone

BGlucagon

CCortisol

DThyroxine

Correct answer

C. Cortisol

Explanation

The correct answer is Cortisol.

3397MedicalMedium

Main arterial supply to the tongue is________?

AFacial artery

BAscending palatine artery

CLingual artery

DAscending pharyngeal artery

Correct answer

C. Lingual artery

Explanation

The correct answer is Lingual artery.

3398MedicalMedium

A distinict advantage that tetracyclines have over penicillins is that tetracyclines________?

AHave a wider range of antibacterial activity

BAre safer to use during pregnancy

CDo not cause superinfections

DHave no side effects

Correct answer

A. Have a wider range of antibacterial activity

Explanation

The correct answer is Have a wider range of antibacterial activity.

3399MedicalMedium

The most common cause of TMJ ankylosis is________?

ARheumatoid arthritis

BOsteoarthritis

CChildhood illness

DTrauma

Correct answer

D. Trauma

Explanation

The correct answer is Trauma.

3400MedicalMedium

Brush border is seen in________?

AProximal convoluted tubule

BDistal convoluted tubule

CLoop of Henle

DBowman’s capsule

Correct answer

A. Proximal convoluted tubule

Explanation

The correct answer is Proximal convoluted tubule.