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Test: Human Circulatory System (NCERT) - NEET MCQ


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15 Questions MCQ Test Biology Class 11 - Test: Human Circulatory System (NCERT)

Test: Human Circulatory System (NCERT) for NEET 2024 is part of Biology Class 11 preparation. The Test: Human Circulatory System (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Human Circulatory System (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Human Circulatory System (NCERT) below.
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Test: Human Circulatory System (NCERT) - Question 1

Heart pumps blood more forcefully in older persons than younger ones due to

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 1

As one ages, arteries lose their elasticity. Consequently the heart has to pump the blood more forcefully in order to fulfill the need of the body cells.

Test: Human Circulatory System (NCERT) - Question 2

Read the following statements and select the correct option.
Statement 1: The SA node acts as pacemaker.
Statement 2: The SA node is located in the wall of the right atrium near the inter-atrial septum.

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 2

The heart beat originates from the SA node which acts a pacemaker. SA node lies in the wall of the right atrium near the opening of the superior vena cava.

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Test: Human Circulatory System (NCERT) - Question 3

Which of the following walls separate the right and left atria?

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 3

A thin, muscular wall called as the inter-atrial septum separates the right and the left atria, whereas a thick-walled, inter-ventricular septum separates the left and the right ventricles.

Test: Human Circulatory System (NCERT) - Question 4

Find the incorrect answer from the following?

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 4

On an average, capillaries are about 1 mm long and 8 mm in diameter. Although each capillary is very narrow, there are so many of them that the capillaries have the greatest total cross sectional area of any other type of vessel. Consequently, the blood decreases in velocity as it passes through the capillary beds, allowing more time for it to exchange materials with the surrounding extracellular fluid. Blood also loses most of its pressure in passing through the vast capillary networks and so is under very low pressure when it enters the veins.

Test: Human Circulatory System (NCERT) - Question 5

Read the following statements and select the correct ones.
(i) Nodal tissue is specialised cardiac musculature in human heart which has the ability to generate action potential due to an external stimuli
(ii) Position of SAN - right corner of right atrium
(iii) Position of AVN - right corner of ventricle
(iv) AV bundle continues from AVN
(v) Purkinje fibres are modified cardiac muscle fibres that originate from the atrioventricular node and spread into the two ventricles.

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 5

SAN (sino-atrial node) is located in the right upper y corner of right atrium. AV bundle continues from AVN (Atrio-ventricular node). Purkinje fibres are modified cardiac muscle fibres that originate from AV node and spread into two ventricles. The nodal musculature has the ability to generate action potential without any external stimuli i.e. it is autoexcitable. AVN is located in the lower left corner of the right atrium close to the atrio-ventricular septum.

Test: Human Circulatory System (NCERT) - Question 6

In the above diagram, which blood vessel represents vena cava?

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 6

In the given diagram 'D' represent the vena cava. Vena cava is either of two large veins that carry deoxygenated blood into the right atrium.

Test: Human Circulatory System (NCERT) - Question 7

The given figure illustrates a section through the human heart.

Which labelled part represents the site for the generation of action potential in human heart?

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 7

A' is SA node that is the site for generation of action potential in human heart.

Test: Human Circulatory System (NCERT) - Question 8

Pacemaker is situated in heart

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 8

Sino-atrial node, also called pacemaker is situated in the right upper corner of the right atrium.

Test: Human Circulatory System (NCERT) - Question 9

In which one of the following pairs, two terms represent the same thing?

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 9

The opening between the left atrium and left ventricle is guarded by a bisuspid valve, also known as mitral valve.

Test: Human Circulatory System (NCERT) - Question 10

In veins, valves are present to check backward flow of blood flowing at: 

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 10

Veins brings blood from different body parts to the heart. The flow of blood in veins is not so fast because the blood in veins is under low pressure. Veins posses valves which present backward flow of blood.

Test: Human Circulatory System (NCERT) - Question 11

Rate of heart beat is determined by

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 11

The cardiac impulse originates from SA node. This impulse is of highest rhythmicity. By determining the rate of discharge of the cardiac impulse the SA node determines the rate of heart beat.

Test: Human Circulatory System (NCERT) - Question 12

Chordae tendineae are found in

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 12

Chordae tendineae are the special fibrous cords attached to the flaps of tricuspid valve on one end and on the other end with the special muscles of the ventricular wall, the papillary muscles.

Test: Human Circulatory System (NCERT) - Question 13

Which of the following chambers of the heart has the thickest muscular wall?

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 13

Left ventricle has the thickest muscular wall as it has to pump the oxygenated blood with great force to all visceral organs and parts of body through aorta.

Test: Human Circulatory System (NCERT) - Question 14

All veins carry deoxygenated blood except

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 14

All veins carry deoxygenated blood from different parts of the body to heart, Pulmonary veins is the only vein that carries oxtgenated blood from the lungs to the left atrium of the heart.

Test: Human Circulatory System (NCERT) - Question 15

Carotid artery supplies

Detailed Solution for Test: Human Circulatory System (NCERT) - Question 15

The carotid arteries are major blood vessels in the neck that supply blood to the brain, neck, and face. There are two carotid arteries, one on the right and one on the left. In the neck, each carotid artery branches into two divisions:
(i) The internal carotid artery supplies blood to the brain.
(ii) The external carotid artery supplies blood to the face and neck.
So, the correct answer is 'Oxygenated blood to brain'

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