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Human Anatomy and Physiology : V. Circulatory System Part-I

📆 October 28, 2024

Total Questions: 40

1. How many times, a healthy person's average heart beats in a minute – [Uttarakhand P.C.S. (Pre) 2007, M.P.P.C.S. (Pre) 2000]

Correct Answer: (c) 72 times
Solution:Heart rate is the speed of the heartbeats, measured by the number of contractions of the heart typically beats per minute. Our heart beats about 72-75 times a minute under normal conditions. During sleep a slow heartbeat rates around 40-50 BPM is common. The cardiac cycle refers to a complete heartbeat from its generation to the beginning of the next beat. This frequency of the cardiac cycle is described by the heart rate or expressed as beats per minute (BPM).

2. When does heart rest? [U.P.P.C.S. (Pre) 2008, U.P. Lower Sub. (Pre) 2004]

Correct Answer: (c) Between two beats
Solution:

Each "heartbeat" consists of a contraction and relaxing of the heart muscles. When the heart contracts, it pumps blood through the blood vessels. When it relaxes, it draws blood in. It takes rest between relaxation and contraction.

3. Which of the following is not a symptom of a heart attack? [M.P.P.C.S. (Pre) 2000]

Correct Answer: (d) Pain in legs
Solution:Heart failure and heart disease do not show the same signs for everyone, especially in women. A heart attack is medically known as a myocardial infarction. The symptoms of heart attack include - pain or discomfort in one or both arms, back, neck, jaws or stomach; shortness of breath with or without chest discomfort and other signs such as breaking out in a cold sweat, nausea or lightheadedness. As with men and women’s most common heart attack symptom is chest pain or discomfort.

4. Which of these are typical signs of heart attack? [Uttarakhand P.C.S. (Mains) 2002]

(1) Nausea
(2) Severe perspiration
(3) Headache
(4) Severe chest pain
Select the correct answer from the given code:

Correct Answer: (d) 1, 2, 4
Solution:

Heart failure and heart disease do not show the same signs for everyone, especially in women. A heart attack is medically known as a myocardial infarction. The symptoms of heart attack include - pain or discomfort in one or both arms, back, neck, jaws or stomach; shortness of breath with or without chest discomfort and other signs such as breaking out in a cold sweat, nausea or lightheadedness. As with men and women’s most common heart attack symptom is chest pain or discomfort.

5. How many chambers are there in heart? [M.P.P.C.S. (Pre) 2010]

Correct Answer: (b) 4
Solution:

In humans, other mammals and birds, the heart is divided into four chambers: upper left and right atria; and lower left and right ventricles. Commonly the right atrium and ventricle are referred together as the right heart and their left counterparts as the left heart. In a healthy heart, blood flows one way through the heart due to heart valves, which prevent backflow.

6. Human heart is made up of how many chambers? [U.P. P.C.S. (Pre) 2023]

Correct Answer: (a) Only four
Solution:A human heart has two upper and two lower chambers (total four chambers). The upper chambers, the right and left atria, receive incoming blood. The lower chambers, the more muscular right and left ventricles, pump blood out of the heart. The heart valves, which keep blood flowing in the right direction, are gates at the chamber openings.

7. Heart beats are caused by an electrical current that originates in the: [Uttarakhand P.C.S. (Mains) 2002]

Correct Answer: (c) Heart
Solution:

An electrical impulse generator, called the "sinus node", sends signals from the right atrium to trigger the heart beat. Like a natural pacemaker, the electrical current follows a web of pathways through the heart, causing the chambers to squeeze and relax in a steady, rhythmic sequence that draws blood into the heart and pulse it out.

8. The pulse in the human wrist beats [U.P.P.C.S. (Mains) 2010, U.P.P.C.S. (Mains) 2008]

Correct Answer: (c) At the same rate as the heart
Solution:Pulse rate is defined as the rate at which our heart beats. It is the number of times our heart beats per minute (bpm). By checking our pulse using a pulse rate chart, we can find out how well our heart is working as our general health and fitness levels.

Monitoring your pulse rate can help you track your overall fitness level and identify any potential heart conditions. An unusually high or low pulse rate, or an irregular heartbeat, can be a sign of something being wrong.

9. The first heart transplant was performed by [U.P. Lower Sub. (Pre) 2004, M.P.P.C.S. (Pre) 1994]

Correct Answer: (d) Dr. Christian Bernard
Solution:The first heart transplant was performed by Dr. Christian Bernard who was a famous surgeon of South Africa. Barnard performed the first transplant on Louis Washkansky on December 3, 1967 at the Groote Schuur Hospital in Cape Town, South Africa.

10. Who among the following had performed the world’s first heart transplant? [U.P.P.C.S. (Pre) 2021]

Correct Answer: (c) Christian Bernard
Solution:The first heart transplant was performed by Dr. Christian Bernard who was a famous surgeon of South Africa. Barnard performed the first transplant on Louis Washkansky on December 3, 1967 at the Groote Schuur Hospital in Cape Town, South Africa.
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