A protein used as food supplement

An oxygen scavenger in root nodules

A plant protein with high lysine content

Lubb sound at the end of systole

Dup sound at the end of systole

Dup sound at the beginning of ventricular systole

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NEET • BIOLOGY • BODY FLUIDS AND CIRCULATION

Body fluids and circulation practice · Easy

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Showing 31-60 of 126 questions

31 Easy

31 of 126

Remembering +4 | -1

Cardiac centre is present in

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Correct option: A

Medulla oblongata

Option A (Medulla oblongata) is correct because the cardiac center, which controls heart rate and force of contraction, is located in the medulla oblongata.

32 Easy

32 of 126

Remembering +4 | -1

The normal level of haemoglobin per 100mL of blood in women is

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Correct option: C

12 g

Option C (12 g) is correct because the normal level of hemoglobin in women is approximately 12 g per 100 mL of blood.

33 Easy

33 of 126

Understanding +4 | -1

Heart muscles are suddenly damaged by an inadequate blood supply in

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Correct option: D

Heart attack

Option D (Heart attack) is correct because it involves sudden damage to heart muscles due to inadequate blood supply.

34 Easy

34 of 126

Understanding +4 | -1

Erythroblastosis foetalis can be seen in marriage between

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Correct option: B

Rh+ve male and Rh-ve female

Option B (Rh+ve male and Rh-ve female) is correct because erythroblastosis foetalis occurs when an Rh-positive father and an Rh-negative mother conceive a Rh-positive child, leading to the mother developing antibodies against the Rh factor.

35 Easy

35 of 126

Remembering +4 | -1

The renal portal vein drains blood to kidney from

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Correct option: D

body parts

Option D (body parts) is correct because the renal portal vein carries blood from the posterior parts of the body to the kidneys.

36 Easy

36 of 126

Understanding +4 | -1

Persons with ‘AB’ blood group are called as “Universal recipients”. This is due to:

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Correct option: B

Absence of antibodies, anti-A and anti-B, in plasma

Option B (Absence of antibodies, anti-A and anti-B, in plasma) is correct because individuals with AB blood group do not have anti-A or anti-B antibodies in their plasma, allowing them to receive blood from any ABO blood type.

37 Easy

37 of 126

Remembering +4 | -1

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

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Correct option: B

Left ventricle

Option B (Left ventricle) is correct because the left ventricle pumps blood to the entire body and requires a thicker muscular wall to generate higher pressure.

38 Easy

38 of 126

Remembering +4 | -1

Haemoglobin is

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Correct option: A

An oxygen carrier in human blood

Option A (An oxygen carrier in human blood) is correct because hemoglobin is a protein in red blood cells that binds to oxygen and transports it throughout the body.

39 Easy

39 of 126

Understanding +4 | -1

Atrial diastole takes place when

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Correct option: C

Both atriums are filled with blood

Option C (Both atriums are filled with blood) is correct because atrial diastole is the relaxation phase when both atria fill with blood.

40 Easy

40 of 126

Remembering +4 | -1

Which of the following is the correct pathway for propagation of cardiac impulse?

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Correct option: A

SA node → AV node → Bundle of His → Purkinje fibres

Option A (SA node → AV node → Bundle of His → Purkinje fibres) is correct because this is the correct sequence of the cardiac impulse propagation through the heart's conduction system.

41 Easy

41 of 126

Understanding +4 | -1

The heart beat increases at the time of interview due to

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Correct option: C

Secretion of adrenaline

Option C (Secretion of adrenaline) is correct because adrenaline, released during stress, increases heart rate.

42 Easy

42 of 126

Understanding +4 | -1

To which of the following, bundle of His passes stimulus of contraction?

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Correct option: C

Purkinje fibre

Option C (Purkinje fibre) is correct because the Bundle of His transmits the cardiac impulse from the AV node to the Purkinje fibers, which then distribute the impulse throughout the ventricular myocardium.

43 Easy

43 of 126

Understanding +4 | -1

By an angiogram, it was analyzed that there is a restriction to the flow of blood in the blood
vessels. Which of the following disease can arise due to such a medical condition?

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Correct option: A

Angina pectoris and coronary artery disease

Option A (Angina pectoris and coronary artery disease) is correct because restriction of blood flow in blood vessels, as detected by an angiogram, can lead to angina and is a characteristic of coronary artery disease.

44 Easy

44 of 126

Understanding +4 | -1

Mammals are said to have double circulation.
It means

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Correct option: C

there are two systems, one from the heart to
the lungs and other from heart to the rest of
the body

Option C is correct because double circulation refers to the presence of two separate circulatory pathways: one to the lungs (pulmonary) and one to the rest of the body (systemic).

45 Easy

45 of 126

Analyzing +4 | -1

Identify the incorrect statements and correct choose the correct option accordingly
I. Interstitial fluid (tissue fluid) and lymph have almost similar composition
II. Lymph and interstitial fluid have no larger proteins and RBC
III. Exchange of the nutrients and gases, etc., between the blood and cells always occurs through tissue fluid
IV. Interstitial fluid has the same mineral distribution as that of the plasma
V. Lymph can be defined as the blood minus RBC but has specialised lymphocytes

View answer and explanation

Correct option: D

None of the above

Option D (None of the above) is correct because all the statements are correct regarding the composition and function of interstitial fluid and lymph.

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46 Easy

46 of 126

Remembering +4 | -1

Heart beat increases by

View answer and explanation

Correct option: A

Adrenal hormones

Option A (Adrenal hormones) is correct because adrenal hormones like epinephrine (adrenaline) increase heart rate.

47 Easy

47 of 126

Understanding +4 | -1

The valves in the heart allows the blood flow in which direction? I. From atria to ventricles II. From ventricles to pulmonary artery III. From pulmonary artery to aorta Choose the correct option

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Correct option: A

I and II

Option A (I and II) is correct because the valves in the heart ensure unidirectional blood flow from atria to ventricles and from ventricles to the pulmonary artery (or aorta).

48 Easy

48 of 126

Application +4 | -1

If the heartbeat of a person is about 75 beats per minute, and stroke volume is 70 mL per
minute, then the cardiac output will be

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Correct option: B

5250 mL

Option B (5250 mL) is correct because cardiac output is calculated by multiplying heart rate by stroke volume: 75 beats/min * 70 mL/beat = 5250 mL/min.

49 Easy

49 of 126

Understanding +4 | -1

A vein possesses a large lumen because

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Correct option: D

Tunica media is a thin coat

Option D (Tunica media is a thin coat) is correct because veins have a thinner tunica media compared to arteries, contributing to their larger lumen.

50 Easy

50 of 126

Remembering +4 | -1

RBCs have an average life span of

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Correct option: C

120 days

Option C (120 days) is correct because the average lifespan of red blood cells (RBCs) in humans is approximately 120 days.

51 Easy

51 of 126

Understanding +4 | -1

The systemic circulation provides nutrients, …A… and other essential substances to the …B… and takes …C… and other harmful substances away for elimination
Choose the correct option for A, B, C and D

View answer and explanation

Correct option: B

A-

{O_2}

, B-tissue, C-

C{O_2}

Option B (A-

{O_2}

, B-tissue, C-

C{O_2}

) is correct because systemic circulation delivers oxygen to the tissues and removes carbon dioxide from them.

52 Easy

52 of 126

Remembering +4 | -1

Which of the following acts as ‘middle man of the body’?

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Correct option: B

Lymph

Option B (Lymph) is correct because lymph acts as an intermediary fluid, transporting nutrients, oxygen, and waste products between blood and tissues.

53 Easy

53 of 126

Understanding +4 | -1

Find out the wrong match

View answer and explanation

Correct option: D

Monocytes – Secrete heparin

Option D is correct because monocytes differentiate into macrophages, which are phagocytic cells, and basophils secrete heparin.

54 Easy

54 of 126

Remembering +4 | -1

First heart sound is

View answer and explanation

Correct option: B

Lubb sound at the beginning of ventricular systole

Option B (Lubb sound at the beginning of ventricular systole) is correct because the first heart sound, "Lubb", occurs at the start of ventricular systole due to the closure of the atrioventricular valves.

55 Easy

55 of 126

Understanding +4 | -1

Neural signals through the sympathetic nerves (ANS) can increase the rate of heart beat by

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Correct option: C

Both (a) and (b)

Option C (Both (a) and (b)) is correct because sympathetic nerve stimulation increases both cardiac output and the strength of ventricular contraction, leading to an increased heart rate.

56 Easy

56 of 126

Remembering +4 | -1

The second step in the coagulation of blood is catalyzed by

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Correct option: A

Thrombin

Option A (Thrombin) is correct because thrombin catalyzes the conversion of fibrinogen to fibrin, which is the second major step in blood coagulation.

57 Easy

57 of 126

Remembering +4 | -1

CAD stands for

View answer and explanation

Correct option: C

Coronary Artery Disease

Option C (Coronary Artery Disease) is correct because CAD is the abbreviation for Coronary Artery Disease.

58 Easy

58 of 126

Understanding +4 | -1

All of the following animals possess 3-chambered heart with two atria and a single ventricle, except

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Correct option: B

Crocodiles

Option B (Crocodiles) is correct because crocodiles possess a 4-chambered heart, unlike other reptiles and amphibians which have 3-chambered hearts.

59 Easy

59 of 126

Understanding +4 | -1

Pick out the incorrectly matched pair from the following

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Correct option: C

Lymph – Contains RBC and proteins

Option C (Lymph – Contains RBC and proteins) is the incorrectly matched pair because lymph does not contain RBCs.

60 Easy

60 of 126

Remembering +4 | -1

Water circulatory system in found in
I. Sponge II. Hydra
III. Annelida IV. Starfish
V. Arthropoda
Choose the correct option

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Correct option: C

I, II and IV

Option C (I, II and IV) is correct because sponges, hydra and starfish have water circulatory systems.

Revision notes and key takeaways

Review BODY FLUIDS AND CIRCULATION in your textbook or class notes, then use this set to check your understanding.

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