MCQOPTIONS
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MCQOPTIONS
This section includes 491 Mcqs, each offering curated multiple-choice questions to sharpen your Medical Subjects knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
Function of GABA on CNS is_______________? |
| A. | Neuronal inhibition |
| B. | Neuronal activation |
| C. | Glial cell inhibition |
| D. | Glial cell activation |
| Answer» B. Neuronal activation | |
| 352. |
Function of ADH is________________? |
| A. | Water reabsorption |
| B. | Water excretion |
| C. | Na+ absorption |
| D. | K+ secretion |
| Answer» B. Water excretion | |
| 353. |
FSH is secreted by_____________? |
| A. | Chromophobes |
| B. | Basophils |
| C. | Acidophiles |
| D. | Theca intern cells |
| Answer» C. Acidophiles | |
| 354. |
Formation of a small volume of concentrated urine in dehydration is associated with____________? |
| A. | More reabsorption in the PCT |
| B. | More concentration in loop of Henle |
| C. | More reabsorption of DCT and collecting ducts |
| D. | All of these |
| Answer» E. | |
| 355. |
For heparin which of the following is ? |
| A. | Inhibits conversion of fibrinogen to insoluble fibrin |
| B. | Interferes with action of thrombin |
| C. | Is released by macrophages |
| D. | Is released by mast cells |
| Answer» D. Is released by mast cells | |
| 356. |
following are the features of cretinism, except_____________? |
| A. | Pot- belly |
| B. | Idiotic look |
| C. | Normal intelligence |
| D. | Stunted growth |
| Answer» D. Stunted growth | |
| 357. |
Following are the changes during accommodation except_______________? |
| A. | Constriction of pupil |
| B. | Dilatation of pupil |
| C. | Convergence of eye ball |
| D. | Increase in the anterior curvature of lens |
| Answer» C. Convergence of eye ball | |
| 358. |
Following are local hormones except___________? |
| A. | Insulin |
| B. | Heparin |
| C. | Bradykinin |
| D. | Acetylcholine |
| Answer» B. Heparin | |
| 359. |
Following are extrapyramidal tracts except______________? |
| A. | Reticulospinal |
| B. | Corticospinal |
| C. | Rubrospinal |
| D. | Vestibulospinal |
| Answer» C. Rubrospinal | |
| 360. |
Fluid content of the blood is______________? |
| A. | Plasma |
| B. | Serum |
| C. | Water |
| D. | Tissue fluid |
| Answer» B. Serum | |
| 361. |
First heart sound occurs during the period of________________? |
| A. | Isotonic relaxation |
| B. | Isovolumetric relaxation |
| C. | Isovolumetric contraction |
| D. | Isotonic contraction |
| Answer» D. Isotonic contraction | |
| 362. |
First change to occur in the distal segment of cut________________? |
| A. | Myelin degeneration |
| B. | Axonal degeneration |
| C. | Mitosis of schwann cell |
| D. | Sprouting |
| Answer» C. Mitosis of schwann cell | |
| 363. |
First change to occur after nerve cut is_______________? |
| A. | Schwan cell mitosis |
| B. | Axonal sprouting |
| C. | Myelin sheath degeneration |
| D. | Nuclear disintegration |
| Answer» D. Nuclear disintegration | |
| 364. |
Fertilized ovum usually gets attached to the uterus wall in ____________? |
| A. | 14 days |
| B. | 28 days |
| C. | 8 weeks |
| D. | 1 week |
| Answer» E. | |
| 365. |
Features of hypothyroidism does not include______________? |
| A. | Obseity |
| B. | Hypertension |
| C. | High TSH levels |
| D. | Increased risk of infections |
| Answer» E. | |
| 366. |
Fats absorbed with the help of bile salts are_______________? |
| A. | Free fatty acid |
| B. | Glycerol |
| C. | Higher fattery acids, diglycerides and monoglycereides |
| D. | All of the above |
| Answer» D. All of the above | |
| 367. |
Fastest conducting tissue in human heart _________________? |
| A. | AV node |
| B. | SA node |
| C. | Bundle of His |
| D. | Purkinje fibers |
| Answer» E. | |
| 368. |
False about blood brain barrier is_______________? |
| A. | There are gaps between tight junctions at the active sites |
| B. | There are no gaps between active sites |
| C. | Less activity in the membrane |
| D. | Fibronectin provides a barrier for diffusion |
| Answer» B. There are no gaps between active sites | |
| 369. |
Excess of cortisol causes______________? |
| A. | Conn’s syndrome |
| B. | Cushing ‘s syndrome |
| C. | Acromegaly |
| D. | Diabetes insipidus |
| Answer» C. Acromegaly | |
| 370. |
ESR depends on_______________? |
| A. | Viscidity |
| B. | Fibrinogen |
| C. | Rouleaux |
| D. | All of the above |
| Answer» E. | |
| 371. |
Erythropoietin is produced in the_______________? |
| A. | Bone marrow |
| B. | Kidney |
| C. | Liver |
| D. | Spleen |
| Answer» C. Liver | |
| 372. |
Epinephrine is most closely related in structure to ____________________? |
| A. | Niacin |
| B. | Tyrosine |
| C. | Methionine |
| D. | Glycerol |
| Answer» C. Methionine | |
| 373. |
Epicrritic perception of pain occurs at the level of______________? |
| A. | Thalamus |
| B. | Area 3,1,2 |
| C. | Areas 5,7 |
| D. | Pulvinar |
| Answer» C. Areas 5,7 | |
| 374. |
Enzymes, which play an important role in calcification are______________? |
| A. | Enolase and Calcitonin |
| B. | Alkaline phosphatase and catalase |
| C. | Alkaline phosphatase and pyrophophatase |
| D. | Pyrophosphatase and carbonic anhydrase |
| Answer» D. Pyrophosphatase and carbonic anhydrase | |
| 375. |
Energy expenditure during normal breathing____________? |
| A. | 25% – 50% of total energy spent |
| B. | 50% -75% of total energy spent |
| C. | 15% – 20% of total energy spent |
| D. | 2% – 3% of total energy spent |
| Answer» E. | |
| 376. |
Endocrine glands that are not influenced by the pituitary gland include the____________? |
| A. | Thyroid gland, testes , and adrenal medulla |
| B. | Adrenal medulla, parathyroids, and the islets of langerhans |
| C. | Adrenal cortex, parathyroids and ovaries |
| D. | Pancreas, adrenal medulla and thyroid gland |
| Answer» C. Adrenal cortex, parathyroids and ovaries | |
| 377. |
Endocrine disorder is the primary cause of______________? |
| A. | Acromegaly |
| B. | Albright’s syndrome |
| C. | Paget’s disease |
| D. | Fibrous dysplasia |
| Answer» B. Albright’s syndrome | |
| 378. |
Embryonic hemoglobin is composed of________________? |
| A. | Gamma and beta |
| B. | Epsilon and gamma |
| C. | Alpha and beta |
| D. | Gamma and alpha |
| Answer» E. | |
| 379. |
Electromyography is used for________________? |
| A. | To study muscle activity |
| B. | Determine class II malocclusion |
| C. | Determine the centric relation |
| D. | Determine the centric occlusion |
| Answer» B. Determine class II malocclusion | |
| 380. |
Effect on force of contraction of heart is_____________? |
| A. | Chronotropic effect |
| B. | Dromotropic effect |
| C. | Bathmotropic |
| D. | Ionotropic effect |
| Answer» E. | |
| 381. |
Each kidney contains about ______ nephrons ? |
| A. | One million |
| B. | Two million |
| C. | Four million |
| D. | ½ million |
| Answer» B. Two million | |
| 382. |
During the initial part of inspiration, which of the following does not occur ? |
| A. | Intrapulmonary pressure falls |
| B. | Intra thoracic pressure rises |
| C. | Intra-abdominal pressure rises |
| D. | The partial pressure of O2 in dead space rises |
| Answer» C. Intra-abdominal pressure rises | |
| 383. |
During inspiration when the diaphragm contracts, the intrapleural pressure becomes_____________? |
| A. | More negative |
| B. | Less negative |
| C. | Positive |
| D. | Equal to the intra alveolar pressure |
| Answer» B. Less negative | |
| 384. |
During exercise_____________? |
| A. | Cerebral blood flow increases if there is increase in systolic blood pressure |
| B. | Body temperature increases |
| C. | Blood flow to muscle increases after 1½ minute |
| D. | Lymphatic flow from muscle decrease |
| Answer» C. Blood flow to muscle increases after 1½ minute | |
| 385. |
Due fear which of the following hormones increases rapidly _______________? |
| A. | Growth hormones |
| B. | Epinephrine |
| C. | Corticosteroid |
| D. | Thyroid hormone |
| Answer» C. Corticosteroid | |
| 386. |
Drumstick is found in_______________? |
| A. | Neutrophils |
| B. | Lymphocytes |
| C. | Monocytes |
| D. | Platelets |
| Answer» B. Lymphocytes | |
| 387. |
DOPA and 5 – Hydroxytryptophan are clinically important because______________? |
| A. | They cross Blood Brain Barriers |
| B. | They are acidic precursors of Brain amines |
| C. | They act as neuromodulators |
| D. | They are metabolites of various neurogentic amines |
| Answer» B. They are acidic precursors of Brain amines | |
| 388. |
Diuresis is caused by______________? |
| A. | Mannitol |
| B. | Glycerol |
| C. | Urea |
| D. | All of the above |
| Answer» E. | |
| 389. |
Distribution of blood flow is mainly regulated by the________________? |
| A. | Arteries |
| B. | Arterioles |
| C. | Capillaries |
| D. | Venules |
| Answer» C. Capillaries | |
| 390. |
Differential white blood cell counts in the laboratory are useful in the diagnosis of_______________? |
| A. | Anemia |
| B. | Eosinophilia |
| C. | Vitamin deficiency |
| D. | Spherocytosis |
| Answer» C. Vitamin deficiency | |
| 391. |
Delta waves of Electroencephalogram have frequency of ______________? |
| A. | More than 14 cycles per second |
| B. | Between 8 and 13 cycles per second |
| C. | Less than 3.5 cycles per second |
| D. | Between 4 and 7 cycles per second |
| Answer» D. Between 4 and 7 cycles per second | |
| 392. |
Delay in blood coagulation results from________________? |
| A. | Human thrombin |
| B. | Heparin |
| C. | Ferric chloride |
| D. | Vit- K |
| Answer» C. Ferric chloride | |
| 393. |
Deficiency of cortisol causes_______________? |
| A. | Cushing syndrome |
| B. | Graves’ disease |
| C. | Addison disease |
| D. | Acromegaly |
| Answer» D. Acromegaly | |
| 394. |
Decreased MCHC is found in_____________? |
| A. | Microcytic hypochromic anemia |
| B. | Megaloblastic anemia |
| C. | Sideroblastic anemia |
| D. | Vit B12 deficiency |
| Answer» B. Megaloblastic anemia | |
| 395. |
Decreased basal metabolic rate is seen in_______________? |
| A. | Obesity |
| B. | Hyperthyroidism |
| C. | Feeding |
| D. | Exercise |
| Answer» B. Hyperthyroidism | |
| 396. |
Cyanosis or bluish coloration of skin and mucus membrane depends upon______________? |
| A. | The relative proportion of reduced and oxygenated hemoglobin |
| B. | The absolute amount of reduced hemoglobin |
| C. | Thickness of the skin |
| D. | Fragility of capillaries |
| Answer» C. Thickness of the skin | |
| 397. |
Cortisol______________? |
| A. | Secretion increases following injury |
| B. | Favours protein synthesis |
| C. | Enhances antigen – antibody reactions |
| D. | Tends to lower blood pressure |
| Answer» B. Favours protein synthesis | |
| 398. |
Cortisol levels are maximum during____________? |
| A. | Sleep |
| B. | Early morning |
| C. | Evening |
| D. | Have no change |
| Answer» C. Evening | |
| 399. |
Coronary blood flow is usually predominantly controlled by_____________? |
| A. | Auto regulation |
| B. | Hormones |
| C. | Parasympathetic impulses |
| D. | Sympathetic impulse |
| Answer» B. Hormones | |
| 400. |
Copious flow of watery saliva is secreted in response to _____________? |
| A. | Parasympathetic stimulation |
| B. | Sympathetic stimulation |
| C. | CNS stimulation |
| D. | sensory stimulation |
| Answer» B. Sympathetic stimulation | |