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Test: Circulatory Pathways


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15 Questions MCQ Test Biology Class 11 | Test: Circulatory Pathways

Test: Circulatory Pathways for NEET 2022 is part of Biology Class 11 preparation. The Test: Circulatory Pathways questions and answers have been prepared according to the NEET exam syllabus.The Test: Circulatory Pathways MCQs are made for NEET 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Circulatory Pathways below.
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Test: Circulatory Pathways - Question 1

The valve situated between the left atrium and the left ventricle is called
(1) Bicuspid valve
(2) Tricuspid valve
(3) Mitral valve
(4) Eustachian tube

Detailed Solution for Test: Circulatory Pathways - Question 1

The valve present between the left atrium and left ventricle is the Bicuspid valve (also known as Mitral valve). During ventricular contraction, the bicuspid valve prevents backward movement of the blood, i.e. from the left ventricle into the left atrium. 

Test: Circulatory Pathways - Question 2

 Artery is a blood vessel which carries blood

Detailed Solution for Test: Circulatory Pathways - Question 2

There are three major types of blood vessels: the arteries, which carry the blood away from the heart; the capillaries, which enable the actual exchange of water and chemicals between the blood and the tissues; and the veins, which carry blood from the capillaries back toward the heart.

Test: Circulatory Pathways - Question 3

The SA node is located in

Detailed Solution for Test: Circulatory Pathways - Question 3

SA node is located in right upper corner of right atrium.
Electrical activity spreads through walls of atria and cause them to contract. This forces blood into ventricles.

Test: Circulatory Pathways - Question 4

The left atrium receives oxygenated blood through

Detailed Solution for Test: Circulatory Pathways - Question 4

The left atrium receives the oxygenated blood from the left and right pulmonary veins, which it pumps to the left ventricle (through the mitral valve) for pumping out through the aorta for systemic circulation.

Test: Circulatory Pathways - Question 5

In human beings, the duration of the cardiac cycle is

Detailed Solution for Test: Circulatory Pathways - Question 5

The duration of the cardiac cycle is reciprocal of heart rate. Assuming a heart rate of 75 beats per minute, each cycle takes 0.8sec.

Test: Circulatory Pathways - Question 6

Blood enters the heart because muscles of the

Detailed Solution for Test: Circulatory Pathways - Question 6

Atrial diastole is characterized by the relaxation of the atrial muscles. During this stage, the blood enters into the atria, as the volume of the blood in the atria increases the pressure within it decreases.
So, the correct answer is option D.

Test: Circulatory Pathways - Question 7

The maximum surface area of the circulatory system is seen in

Detailed Solution for Test: Circulatory Pathways - Question 7

An adult human has been estimated to have some 60,000 miles (96,560 km) of capillaries with a total surface area of some 8001000 m2. The total volume of this system is roughly 5 liters, the same as the total volume of blood.

Test: Circulatory Pathways - Question 8

In ECG, the depolarisation of atria is indicated by

Detailed Solution for Test: Circulatory Pathways - Question 8

P wave in ECG deflection represents atrial depolarization. Atrial repolarization occurs during ventricular depolarization and is obscured. QRS wave: ECG deflection representing ventricular depolarization. T wave: ECG deflection representing ventricular repolarization.

Test: Circulatory Pathways - Question 9

A respiratory pigment is absent in

Detailed Solution for Test: Circulatory Pathways - Question 9 Haemolymph is present in cockroach....
Test: Circulatory Pathways - Question 10

In adult man, normal blood pressure is

Detailed Solution for Test: Circulatory Pathways - Question 10

Blood pressure is the measurement of the pressure of the blood in the artery. Blood pressure peaks when the heart muscle contracts and pumps blood, a cycle called systole. It falls when the heart relaxes and refills with blood, a cycle called diastole. Systole is the top number and diastole is the bottom number. An optimal blood pressure level is a reading under 120/80 mmHg. Readings over 120/80mmHg and up to 139/89mmHg are in the normal to high range.

Test: Circulatory Pathways - Question 11

The opening of the right atrium into the right ventricle of the human heart is guarded by

Detailed Solution for Test: Circulatory Pathways - Question 11

The right atrioventricular valve is also known as the tricuspid valve, since it has three cusps, or flaps, that open and closes. When this valve is open, blood flows freely from the right atrium into the right ventricle. However, when the right ventricle begins to contract, the valve closes, so that blood cannot return to the right atrium; this ensures forward flow into the pulmonary artery.
So, the correct answer is option A.

Test: Circulatory Pathways - Question 12

Pacemaker is

Detailed Solution for Test: Circulatory Pathways - Question 12

The sino-atrial (SA) node is a specialised bundle of neurons located in the upper part of the right atrium of the heart. The cardiac impulse originating from the SA node triggers a sequence of electrical events in the heart, thereby controlling the sequence of muscle contraction that pumps blood out of the heart. Since the SA node initiates and maintains the rhythmicity of the heart, it is known as the natural pacemaker of the human body.

Test: Circulatory Pathways - Question 13

Cockroach and other insects have blood which

Detailed Solution for Test: Circulatory Pathways - Question 13

Insects, like all other arthropods, have an open circulatory system, whereby blood, (haemolymph), flows freely through the body cavity, (haemocoel). There is a dorsal vessel which is closed at the posterior end of the abdomen, and runs forward along the dorsal midline and opens in the head at the anterior portion. There are several chambers and openings known as ostia along the dorsal vessel where blood enters it through valves. The blood is then pumped forward to the aorta and into the body cavity. 

Therefore, the correct answer is option A.

Test: Circulatory Pathways - Question 14

For the blood to flow from the right ventricle to the left ventricle in the mammalian heart, it must flow through

Detailed Solution for Test: Circulatory Pathways - Question 14

The deoxygenated blood moves from the right ventricle to the lungs through the pulmonary artery. The oxygenated blood from lungs flows back to the left auricle through pulmonary vein. Then, by auricular contraction, oxygenated blood reaches the left ventricle.

Test: Circulatory Pathways - Question 15

 Red cell count is carried out by

Detailed Solution for Test: Circulatory Pathways - Question 15

Hemocytometer is a device used to count red blood cells.
Haemoglobinometer is an apparatus for measuring the amount of hemoglobin.
Sphygmomanometer is used to measure blood pressure.
Electrocardiogram is the recording of the electrical activity of the heart.
Thus, the correct answer is option (B), 'Haemocytometer'.

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