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NEET • BIOLOGY • BODY FLUIDS AND CIRCULATION

Body fluids and circulation practice · Hard

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Showing 31-46 of 46 questions

31 Hard

31 of 46

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The heartbeat of which animals is myogenic in nature

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Correct option: C

Elephant

Option C (Elephant) is correct because mammals, including elephants, have myogenic hearts, meaning the heartbeat is initiated within the heart muscle itself.

32 Hard

32 of 46

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Which of the following are component of blood:

(a) Plasma protein

(b)

\mathrm{Na}^{+}, \mathrm{Ca}^{+2}, \mathrm{Mg}^{+2}

and

\mathrm{Cl}^{-}

View answer and explanation

Correct option: D

All

Option D (All) is correct because plasma proteins, ions (Na+, Ca+2, Mg+2, Cl-), water, monocytes, and basophils are all components of blood.

33 Hard

33 of 46

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Elevation in

{pH}

of blood will

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Correct option: B

Increase the affinity of haemoglobin with oxygen

Option B (Increase the affinity of haemoglobin with oxygen) is correct because an increase in pH (more alkaline conditions) increases the affinity of hemoglobin for oxygen, according to the Bohr effect.

34 Hard

34 of 46

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In which of the following options the types of heart is correctly matched to their respective group of animals?

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Correct option: C

Four chambered heart- Birds and mammals

Option C (Four chambered heart- Birds and mammals) is correct because birds and mammals both have four-chambered hearts, allowing for complete separation of oxygenated and deoxygenated blood.

35 Hard

35 of 46

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A. pH of blood : (P)

B. Blood forms (W)% of the total body weight

C. Proteins from (Pr)% of plasma

D. The thickness of RBC (R) micrometer

The correct arrangement of the above value is

View answer and explanation

Correct option: A

>

>

>

Option B (W > Pr > P > R) is correct because the approximate percentages and values are: Blood forms (W) 8% of body weight, Proteins form (Pr) 7% of plasma, pH of blood (P) is 7.4, and the thickness of RBC (R) is 2 micrometer.

36 Hard

36 of 46

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The renal portal system is made of

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Correct option: D

Femoral, sciatic, renal portal veins

Option D (Femoral, sciatic, renal portal veins) is correct because the renal portal system is formed by the femoral and sciatic veins which join to form the renal portal vein.

37 Hard

37 of 46

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Assertion: WBCs accumulate at site of wounds by diapedesis.
Reason: It is squeezing of leucocytes from endothelium.

View answer and explanation

Correct option: B

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

Option B (If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion) is correct because while both statements are true, diapedesis is the process of WBCs squeezing through capillary walls, and the accumulation at wound sites is due to chemotaxis.

38 Hard

38 of 46

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Assertion: Closed circulatory system is more advantageous

Reason: In this the flow of fluid can be more precisely regulated

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Correct option: A

If both the assertion and the reason are true and the reason is a correct explanation of the assertion

Option A (If both the assertion and the reason are true and the reason is a correct explanation of the assertion) is correct because closed circulatory systems allow for precise regulation of fluid flow, making them more advantageous than open systems.

39 Hard

39 of 46

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Spiral value is present in

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Correct option: D

Truncus arteriosus

Option D (Truncus arteriosus) is correct because the spiral valve is present in the truncus arteriosus of amphibians and some fish, helping to separate oxygenated and deoxygenated blood.

40 Hard

40 of 46

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Dub heart sound comes during

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Correct option: C

Early joint diastole

Option C (Early joint diastole) is correct because the \"dub\" heart sound is produced by the closing of the semilunar valves at the beginning of ventricular diastole (early joint diastole).

41 Hard

41 of 46

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Rouleaux Formation is related to which of the cell/tissue:

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Correct option: A

\mathrm{RBC}

Option A (RBC) is correct because Rouleaux formation is the stacking of red blood cells (RBCs) which look like stacks of coins.

42 Hard

42 of 46

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[A]: The "balloon pump" is used to assist the heart.

[R]: Balloon is used when heart is removed from the body.

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Correct option: C

A is true but R is false

Option C (A is true but R is false) is correct because a balloon pump is used to assist the heart, but not when the heart is removed from the body.

43 Hard

43 of 46

Understanding +4 | -1

Intrinsic and extrinsic pathways of blood clotting are interlinked at the activation steps of which of the following factors?

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Correct option: C

Factor X

Option C (Factor X) is correct because both the intrinsic and extrinsic pathways converge at the activation of Factor X, leading to the common pathway of blood coagulation.

44 Hard

44 of 46

Understanding +4 | -1

Which one of the following is an incorrect pair?

View answer and explanation

Correct option: D

End of T-wave

\rightarrow

End of Diastole

Option D (End of T-wave

\rightarrow

End of Diastole) is correct because the end of the T-wave marks the end of systole, not diastole.

45 Hard

45 of 46

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Transudation is associated with

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Correct option: B

Capillaries and tissue fluid

Option B (Capillaries and tissue fluid) is correct because transudation is the movement of fluid from capillaries into the tissue fluid.

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46 Hard

46 of 46

Understanding +4 | -1

Which of the following is not correct for blood pressure?
(i) It is not affected by atherosclerosis.
(ii) It is typically lower in veins than in arteries.
(iii) Diastolic pressure is higher than systolic pressure.
(iv) It is usually refers to as venous pressure of the systemic circulation.

View answer and explanation

Correct option: D

(i), (iii) & (iv)

Option D ((i), (iii) & (iv)) is correct because atherosclerosis affects blood pressure, diastolic pressure is lower than systolic pressure, and blood pressure typically refers to arterial pressure.

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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