medical MCQs – Page 98

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

4851. Which of the following cell type is not a precursor of erythrocyte____________?
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A. Norm oblast

B. PR erythroblast

C. Reticulocyte

D. Myeloblast
4852. Infants acquire adult hemoglobin level at_____________?
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A. End of 1st year

B. Birth

C. Puberty

D. 4 years

4853. Most important function of albumin in body is_______________?
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A. Toxic transport

B. Drug transport

C. Oncotic pressure

D. Coagulation

4854. Ventilation perfusion ratio is maximum in_______________?
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A. Middle lobe of lung

B. Base of lung

C. Posterior lobe of lung

D. Apex of lung
4855. The best stimulator of respiratory center is____________?
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A. Decrease in arterial carbon dioxide level

B. None of the above

C. Increase in arterial carbon dioxide level

D. Increase in arterial oxygen level

4856. False about blood brain barrier is_______________?
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A. Fibronectin provides a barrier for diffusion

B. There are no gaps between active sites

C. There are gaps between tight junctions at the active sites

D. Less activity in the membrane

4857. Which is caused by acetylcholine through nicotinic receptors_____________?
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A. Contraction of pupils

B. Decrease of heart rate

C. Contraction of skeletal muscle

D. Secretion of saliva

4858. At high altitudes the following changes takes place except_______________?
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A. Increase in respiratory rate

B. Increase in oxygen carrying capacity of blood

C. Increase in partial pressure of CO2

D. Increases in depth of respiration

4859. The contractile element in a skeletal muscle is present in______________?
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A. Sarcoplasm

B. Sarcolemma

C. Myofibril

D. Endomysium

4860. What is the normal PH of human blood_____________?
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A. 7.35 to 7.4

B. 7.6

C. 7

D. 7.2

4861. The normal brown red color of feces results from the presence of_______________?
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A. Heme

B. Bilirubin diglucuronide

C. Biliverdin

D. Stercobilin
4862. The neuromuscular transmitter released at neuromuscular junction is_______________?
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A. Acetylcholine

B. Epinephrine

C. Dopamine

D. Nor epinephrine

4863. The hyperosmolarity of the renal medulla is due to increased content of_____________?
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A. Glucose

B. NH4+

C. K+

D. Na+
4864. The eosinophil count in the peripheral blood smear is increased in________________?
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A. Allergic conditions

B. Anemia

C. Typhoid fever

D. Polycythemia

4865. Normal adult persons blood contains_____________?
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A. 20% eosinophils

B. 10% basophils

C. 40% neutrophils

D. 30% lymphocytes
4866. Carotid body function in an organ work as_______________?
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A. Differential pressure of oxygen in arterial blood

B. Differential pressure of oxygen in in hemoglobin synthesis

C. Differential pressure of oxygen in venous blood

D. Differential pressure of oxygen in in tissue fluids

4867. Upstroke of action potential would lead to________________?
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A. None of the above

B. Net current in an outward direction

C. Cell interior becomes less negative

D. Cell interior becomes more negative

4868. Non- respiratory function of the lung is_________________?
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A. Serotonin metabolism

B. Dopamine metabolism

C. Adrenaline metabolism

D. PGE2 production

4869. Shift of the oxygen dissociation curve to right is caused by the following factors EXCEPT_______________?
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A. Increased concentration of carbon di oxide

B. Increased concentration of oxygen

C. Increased temperature

D. Increased 2,3 BPG

4870. Albumin is_____________?
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A. Nucleo protein

B. Phospho protein

C. Chromo protein

D. Simple protein
4871. Non true regarding Na/K pump is______________?
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A. Hypocalcemia inhibits the pump

B. Increase in intracellular Na

C. 5 Na+ exchanged for 2K+

D. Pumps Na against a gradient

4872. Which of the following is one for a patient on coumarin (warfarin) therapy_______________?
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A. Capillary fragility test (CFT)

B. Partial thromboplastin time ( PTT)

C. Bleeding time (BT)

D. Prothrombin time (PT)
4873. Lymphocytes are located in each of the following tissues or organs EXCEPT one. The one exception is______________?
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A. Lymph nodes

B. Thymus gland

C. Brain

D. Spleen

4874. Lysis of RBCs are seen in all of the following except__________?
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A. Methotrexate therapy

B. Thalassemia

C. Obstructive jaundice

D. Sickle cell anemia

4875. CO2 is carried in the blood________________?
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A. In combination with hemoglobin

B. All of the above

C. In physical solution in plasma

D. In combination with plasma proteins

4876. Ammonia in the kidney tubules is excreted in exchange for______________?
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A. PO4-2

B. Na+

C. CL-

D. HCO3-

4877. Macula dense in kidney is located in relation to______________?
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A. Efferent arteriole

B. PCT

C. DCT

D. Afferent arteriole

4878. Increase in threshold level on applying subthreshold, slowly rising stimulus is known as ___________?
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A. Refractoriness

B. Electrotonus

C. Adaptation

D. Accommodation
4879. Survival time of platelet is approximately______________?
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A. 10 weeks

B. 10 days

C. 10 hours

D. 100 days

4880. The processing of short-term memory to long term memory is done in_______________?
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A. Amygdala

B. Neocortex

C. Prefrontal cortex

D. Hippocampus
4881. Plasma factor present in both serum & plasma is____________?
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A. II

B. Fibrinogen

C. VII

D. V

4882. Hemoglobin is the major buffer in blood, bicarbonate ions diffuse out of erythrocyte into plasma in exchange of_______________?
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A. Phosphate

B. Chloride ion

C. Carbonic acid

D. Potassium

4883. In renal glycosuria, the renal threshold for glucose is_______________?
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A. Low

B. Greatly increased

C. Same

D. High

4884. The function of vitamin K is______________?
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A. Prothrombin formation

B. Fibrin formation

C. Thromboplastin formation

D. Thrombin formation

4885. Potassium is maximum in_____________?
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A. Interstitium

B. Bone

C. Cell

D. Plasma

4886. Blood cells arise in bone marrow and are subject to______________?
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A. Regular renewal

B. Infrequent renewal

C. Irregular renewal

D. None of the above

4887. What is true about pneumothorax ?
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A. Increased lung compliance

B. Total chest wall diameter is increased

C. The concentration of surfactant is reduced in alveoli

D. Interpleural pressure becomes more negative

4888. Meiotic division of male germ cells commence_______________?
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A. just before birth

B. by around 16 years

C. by around 6 years after birth

D. During intra uterine life

4889. During the initial part of inspiration, which of the following does not occur ?
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A. Intrapulmonary pressure falls

B. The partial pressure of O2 in dead space rises

C. Intra thoracic pressure rises

D. Intra-abdominal pressure rises

4890. Two substances that can probably be used to determine filtration fraction are_______________?
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A. Inulin and PAH

B. Inulin and mannitol

C. Urea and diodrast

D. PAH and Phenol red

4891. In a DNA molecule adenine always forms a linkage with______________?
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A. Thymine

B. Uracil

C. Cytosine

D. Guanine

4892. Which of the following is important in renal excretion of hydrogen ion ?
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A. Combining H+ with Cl- to form Hcl

B. Trapping H+ by NH3+

C. Combining H+ and HCO3- via enzyme carbonic anhydrase

D. Trapping H+ by acetate

4893. Proximal renal tubule is most permeable to _______________?
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A. Ammonia

B. Sodium

C. Potassium

D. Bicarbonate

4894. GFR is increased when________________?
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A. Tubular hydrostatic pressure is increased

B. Glomerular hydrostatic pressure is decreased

C. Plasma oncotic pressure is increased

D. Increased renal blood flow
4895. Biconcave shape of RBC helps by___________________?
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A. Increasing surface area

B. Carrying more Hemoglobin

C. Increasing flexibility

D. Passing easily through smaller capillaries
4896. Valve of Hasner is present at________________?
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A. Naso lacrimal duct

B. Stensons duct

C. common bile duct

D. maxillary Sinus

4897. In peripheral tissues which of the following contains substance P______________?
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A. Plasma cell

B. Mast cell

C. Nerve terminal

D. Vascular endothelium

4898. A decrease in the arterial PO2 is seen in______________?
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A. High altitudes

B. Decrease in hemoglobin concentration of arterial blood

C. Sluggish blood flow

D. Paralysis of inspiratory muscles

4899. Each kidney contains about ______ nephrons ?
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A. One million

B. million

C. Two million

D. Four million

4900. Gut associated lymphoid tissue ( GALT) is primarily located in______________?
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A. Submucosa

B. Muscularis

C. Serosa

D. Lamina propria