Competitive Exams: Medical Science MCQs (Practice-Test 40 of 135)

  1. Structure of growing epiphyseal cartilage is formed by all the following zones Except:

    1. Zone of ossification

    2. Zone of calcified matrix

    3. Zone of proliferation

    4. Resting zone

  2. Which one of the following pairs is not correctly matched?

      • Thyroid follicles
      • Colloid
      • Parafolliacular cells
      • Paratahormone
      • Thyroglobulin
      • Iodine
      • Calcitonin
      • Calcium
  3. In cervical vertebrae, the costal element is represented by all of the following process Except:

    1. Anterior root

    2. Posterior root

    3. Anterior tubercle

    4. Posterior tubercle

  4. Impaired stereognosis is seen in the lesions of all the following Except:

    1. Gracile fasciculus and cuneate fasciculus

    2. Ventrobasal complex of thalamus

    3. Broadmanns areas 3, 1, 2 and 5, 7

    4. Broadmanns areas 4 and 6

  5. Which one of the following procedures may be used clinically to bring about the latent EEG abnormalities?

    1. Lowering the body sugar level

    2. Reducing the blood sugar level

    3. Raising plasma mineralocorticoid level

    4. Inducing hyperventilation

  6. Cerebello-cerebral connections are important for all of the following Except:

    1. Error detection during locomotion

    2. Comparison of cerebral cortical command and muscle action

    3. Detection and damping oscillatory muscle movements

    4. Posture and equilibrium

  7. A feedback circuit form caudate to substantia nigra is made up of neurons that secrete

    1. dopamine

    2. GABA

    3. acetylcholine

    4. glutamic acid

  8. Match List I (Substance) with List II (Normal renal clearance value, ml/min) and select the correct answer:

    List-I List-II
    1. Urea (Maximal)

    2. PAH

    3. Glucose

    4. Insulin

    1. Zero

    2. 70 − 90

    3. 120 − 130

    4. 600 − 650

    • A
    • B
    • C
    • D
      • 4
      • 2
      • 3
      • 1
      • 4
      • 2
      • 1
      • 3
      • 2
      • 4
      • 3
      • 1
      • 2
      • 4
      • 1
      • 3
  9. The disappearance of sexual cycle in a woman (menopause) is due to

    1. Decline in the release to GnRH from hypothalamus

    2. Decline in the release of LH an FSH from anterior pituitary

    3. Unresponsiveness of ovaries to gonadotrophins

    4. Unresponsiveness of uterine endomdetrium to gonadal hormones

  10. Cardiac muscle is able to function as a syncytium because of the structural presence of

    1. Branching fibres

    2. Intercalated disc

    3. Protoplasmic bridges between cells

    4. Gap-junctions

  11. Diagram of Ventricular Muscle Action Potential is shown below: Which phase of ventricular action potential shown above has the highest conductance for Ca2 +?

    1. Phase 0

    2. Phase 1

    3. Phase 2

    4. Phase 3

  12. Stimulation of baroreceptors leads to

    1. increase in blood pressure and heart rate

    2. decrease in blood pressure and no change in heart rate

    3. decrease in both blood pressure and heart rate

    4. no change in either blood pressure or heart rate

  13. Oxygen sensitive K + channels are located in the cell membranes of

    1. inspiratory centre in medulla oblongata

    2. carotid and aortic sinus

    3. Chemotaxis centre in pons

    4. Carotid and aortic bodies

  14. After drinking a large volume of water, the tonicity is highest in the tubular fluid of

    1. Proximal convoluted tubule

    2. Thin segment of loop of Henle

    3. Distal convoluted tubule

    4. Collecting duct

  15. Which one of the following is important in renal excretion of hydrogen ion?

    1. Combining H + with CI to form HCl

    2. Combining H + and CHO3 via enzyme carbonic anhydase

    3. Trapping H + by acetate

    4. Trapping H + by NH3