Biology - Comprehensive Mock Test 43

Question 421 Medium

Among the following stem cells, which are found in the umbilical cord?

A) Cord blood stem cells B) Adult stem cells C) Embryonic stem cells D) All of the above

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Question 422 Medium

The vein that does not directly open into the heart is?

A) Pulmonary vein B) Postcaval vein C) Precaval vein D) Posterior mesenteric vein

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Question 423 Medium

If one litre of water is introduced in human blood, then ?

A) BMR decreases B) BMR increases C) RBC collapses and urine production increases D) RBC collapses and urine production decreases

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Question 424 Medium

Which chamber of the human heart has the thickest muscular wall?

A) Right ventricle B) Left auricle C) Left ventricle D) Right auricle

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Question 425 Hard

When body tissues are injured resulting in the loss of blood, the process of blood clot begins and the blood platelets release ?

A) Fibrinogen B) Thrombin C) Prothrombin D) Thromboplastin

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Question 426 Medium

The average diameter of Red Blood Corpuscles of man is ?

A) 7.2 μm B) 8.1 μm C) 9.2 μm D) 10.3 μm

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Question 427 Medium

The blood calcium level is lowered by the deficiency of?

A) Calcitonin B) Parathormone C) Thyroxine D) Both Calcitonin and Parathormone

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Question 428 Medium

The blood does not clot inside the body because of?

A) Oxygenation of blood B) Movement of blood C) Heparin in blood D) Absence of fibrinogen in blood

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Question 429 Medium

To obtain a standard ECG, a patient is connected to the machine with three electrodes ?

A) One to each wrist and to the left ankle B) One to each ankle and to the left wrist C) One to each wrist and to the left chest region D) One to each ankle and to the left chest region

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Question 430 Easy

The most active phagocytic white blood cells are?

A) Neutrophils and monocytes B) Neutrophils and eosinophils C) Lymphocytes and macrophages D) Eosinophils and lymphocytes

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