A protein used as food supplement

An oxygen scavenger in root nodules

A plant protein with high lysine content

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NEET • BIOLOGY • BODY FLUIDS AND CIRCULATION

Body fluids and circulation practice · Mixed difficulty

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Showing 91-120 of 335 questions

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91 Easy

91 of 335

Remembering +4 | -1

The opening of auricles and ventricles on the right side is guarded by

View answer and explanation

Correct option: A

Tricuspid valve

Option A (Tricuspid valve) is correct because the tricuspid valve guards the opening between the right auricle (atrium) and the right ventricle.

92 Medium

92 of 335

Understanding +4 | -1

Which one of the following mammalian cells is not capable of metabolizing glucose to carbon dioxide aerobically?

View answer and explanation

Correct option: D

Red blood cells

Option D is correct because red blood cells (RBCs) lack mitochondria and rely on anaerobic glycolysis for energy production, thus they cannot metabolize glucose to carbon dioxide aerobically.

93 Medium

93 of 335

Analyzing +4 | -1

Assertion (A) The body has the ability to alter the stroke
volume and the heart rate
Reason (R) The metabolic needs of the body are met by
these changes, but the duration of cardiac cycle remains
same.

View answer and explanation

Correct option: C

If A is true, but R is false

Option C (If A is true, but R is false) is correct because while the body can alter stroke volume and heart rate, the duration of the cardiac cycle changes with heart rate.

94 Easy

94 of 335

Understanding +4 | -1

A patient comes to a doctor’s clinic situated on the 6th floor by walking up the staircase. As soon as he
reaches the clinic, the nurse records his blood pressure as 148/92 mm Hg. Which of these statements is surely
correct?

View answer and explanation

Correct option: C

The patient has high blood pressure but may or may not have hypertension

Option C (The patient has high blood pressure but may or may not have hypertension) is correct because a single high blood pressure reading does not necessarily indicate chronic hypertension.

95 Medium

95 of 335

Analyzing +4 | -1

Assertion: The cardiac output of an athlete man
and of an ordinary is the same.

Reason: It is impossible to alter the stroke volume
as well as heart rate.

View answer and explanation

Correct option: D

If both Assertion and Reason are false

Option D (If both Assertion and Reason are false) is correct because the cardiac output of an athlete is generally higher than that of an ordinary person, and it is possible to alter both stroke volume and heart rate.

96 Medium

96 of 335

Application +4 | -1

A man whose blood group is not known meets with a serious accident and needs blood transfusion immediately. Which one of the blood groups readily available in the hospital will be safe for transfusion?

View answer and explanation

Correct option: B

O, Rh

{}^+

Option A (O, Rh

{}^-

) is correct because O negative blood is the universal donor, meaning it can be safely transfused to individuals with any blood type in emergency situations when the recipient's blood type is unknown.

97 Medium

97 of 335

Analyzing +4 | -1

Assertion: The clotting process can occur in
the absence of all cellular elements except
platelets.

Reason: Activated platelets release vitamin K.

View answer and explanation

Correct option: C

If Assertion is true but Reason is false

Option C (If Assertion is true but Reason is false) is correct because the clotting process primarily requires platelets and clotting factors, but activated platelets do not release vitamin K.

98 Easy

98 of 335

Remembering +4 | -1

Universal blood recipient is

View answer and explanation

Correct option: B

Blood group-AB

Option B (Blood group-AB) is correct because individuals with blood type AB have both A and B antigens on their red blood cells and therefore do not produce anti-A or anti-B antibodies, allowing them to receive blood from any ABO blood type.

99 Easy

99 of 335

Remembering +4 | -1

Cardiac centre is present in

View answer and explanation

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.

100 Medium

100 of 335

Application +4 | -1

A person has cardiac output

5600 \mathrm{~ml} /

minute and stroke volume

70 \mathrm{~ml}

. What would be the number of heartbeats in 2 minutes in this person?

View answer and explanation

Correct option: D

160 heart beats

Option D (160 heart beats) is correct because heart rate is cardiac output divided by stroke volume (5600 mL/min / 70 mL/beat = 80 beats/min). Therefore, in 2 minutes, the number of heartbeats is 80 beats/min * 2 min = 160 beats.

101 Medium

101 of 335

Remembering +4 | -1

Platelets are

View answer and explanation

Correct option: D

All of the above

Option D (All of the above) is correct because platelets are indeed also called thrombocytes, are cell fragments, and are produced from megakaryocytes.

102 Hard

102 of 335

Understanding +4 | -1

Which of the following statements is correct regarding Rh Incompatibility.

View answer and explanation

Correct option: A

Rh antigens of the foetus do not get exposed to the Rh-ve blood of the mother in the first pregnancy as the two bloods are well separated by the placenta.

Option A (Rh antigens of the foetus do not get exposed to the Rh-ve blood of the mother in the first pregnancy as the two bloods are well separated by the placenta) is correct because the placenta usually prevents mixing of foetal and maternal blood during the first pregnancy, thus preventing sensitization.

103 Hard

103 of 335

Remembering +4 | -1

A symptom of acute chest pain is called:

View answer and explanation

Correct option: B

Angina

Option B (Angina) is correct because angina is chest pain caused by reduced blood flow to the heart muscle, often a symptom of coronary artery disease.

104 Medium

104 of 335

Understanding +4 | -1

Which of the following statement is incorrect about the lymph
I. Lymph is colourful as it has haemoglobin but no RBC
II. The fluid present in the lymphatic system is called lymph
III. It contains specialised lymphocytes which are responsible for the immunity of the body
IV. Lymph is an important carrier for nutrients and hormones
V. Fats are absorbed through the lymph in the lacteals present in the intestinal villi
Choose the correct option

View answer and explanation

Correct option: A

Only I

Option A (Only I) is correct because lymph is not colorful and does not contain hemoglobin or RBCs.

105 Easy

105 of 335

Remembering +4 | -1

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

View answer and explanation

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.

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106 Medium

106 of 335

Application +4 | -1

A person having only anti-B antibodies in his plasma, can donate blood to people with blood groups

View answer and explanation

Correct option: A

A and AB

Option A (A and AB) is correct because a person with only anti-B antibodies can donate blood to people with blood groups A and AB.

107 Medium

107 of 335

Understanding +4 | -1

In an open circulatory system,

View answer and explanation

Correct option: A

There is no distinction between the blood and the tissue fluid

Option A (There is no distinction between the blood and the tissue fluid) is correct because in an open circulatory system, blood and interstitial fluid mix to form hemolymph.

108 Easy

108 of 335

Understanding +4 | -1

Heart muscles are suddenly damaged by an inadequate blood supply in

View answer and explanation

Correct option: D

Heart attack

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

109 Medium

109 of 335

Remembering +4 | -1

How many double circulations are normally completed by the human heart, in one minute?

View answer and explanation

Correct option: C

Seventy two

Option C (Seventy two) is correct because the human heart normally beats around 72 times per minute, and each heartbeat completes one double circulation.

110 Easy

110 of 335

Understanding +4 | -1

Erythroblastosis foetalis can be seen in marriage between

View answer and explanation

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.

111 Easy

111 of 335

Remembering +4 | -1

The renal portal vein drains blood to kidney from

View answer and explanation

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.

112 Easy

112 of 335

Understanding +4 | -1

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

View answer and explanation

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.

113 Easy

113 of 335

Remembering +4 | -1

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

View answer and explanation

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.

114 Easy

114 of 335

Remembering +4 | -1

Haemoglobin is

View answer and explanation

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.

115 Easy

115 of 335

Understanding +4 | -1

Atrial diastole takes place when

View answer and explanation

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.

116 Easy

116 of 335

Remembering +4 | -1

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

View answer and explanation

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.

117 Easy

117 of 335

Understanding +4 | -1

The heart beat increases at the time of interview due to

View answer and explanation

Correct option: C

Secretion of adrenaline

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

118 Easy

118 of 335

Understanding +4 | -1

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

View answer and explanation

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.

119 Easy

119 of 335

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?

View answer and explanation

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.

120 Medium

120 of 335

Understanding +4 | -1

The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of

View answer and explanation

Correct option: C

Sinuatrial node

Option C (Sinuatrial node) is correct because the sinoatrial (SA) node is the natural pacemaker of the heart.

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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