System of the Human Body — 35 Biology PYQs with Answers | UKPSC PYQ Hub

Question 1

Which of the following compound is known as “Starch of Animals”?

Accepted Answer

Glycogen. Glycogen is known as '' starch of Animals". Animal body stores carbohydrate as glycogen. Because its structure is similar to amylopectin it is also called animal starch.

Question 2

The blood pressure of a healthy human being (Systolic and Diastolic) is–

Accepted Answer

120 mm and 80 mm. The determined average systolic and diastolic pressure of a healthy adult human is 120/80 mm of Hg. Blood pressure can be defined as the force of pressure exerted by blood on the inner wall of blood vessels. Systolic pressure is always higher compared to diastolic pressure.

Question 3

The function of Hemoglobin in human body is–

Accepted Answer

Transportation of O. The function of Hemoglobin in human body is transportation of O . Hemoglobin is essential for transferring oxygen in blood from the lungs to the tissues. Myoglobin, in muscle cells, accepts, stores, transports and releases oxygen. Iron is an essential mineral found in the body. Iron plays a central role in many biochemical processes in the body. These include oxygen transport and storage, assisting with immunity and contributing to enzyme systems.

Question 4

When the kidneys stop working, which substance start accumulating in human body?

Accepted Answer

Nitrogenous waste substances. When the kidneys stop working, nitrogenous waste substances start accumulating in human body. If kidneys stop working completely, human body fills with extra water and waste products. This condition is called uremia. Hands or feet may swell. One will feel tired and weak because body needs clean blood to function properly.

Question 5

When a person gets old, then his blood pressure generally–

Accepted Answer

Increases. When a person gets old, then his blood pressure generally increases. The blood itself changes slightly with age. Normal aging causes a reduction in total body water. As part of this, there is less fluid in the bloodstream, so blood volume decreases. The main artery from the heart (aorta) becomes thicker, stiffer, and less flexible. This is probably related to changes in the connective tissue of the blood vessel wall. This makes the blood pressure higher and makes the heart work harder, which may lead to thickening of the heart muscle (hypertrophy). The other arteries also thicken and stiffen. In general, most older people have a moderate increase in blood pressure.

Question 6

Heart of a normal human being beats at a rate of?

Accepted Answer

72 beats/minute. Heart of a normal human being beats at a rate of 72 beats per minute. Normal resting heart rate ranges from 60 to 100 beats per minute.

Question 7

In living beings – Diet, Respiration and Synthesis are three main qualities of?

Accepted Answer

Metabolism. In living beings – Nutrition, Respiration and Synthesis are three main qualities of metabolism. Metabolism is the process by which the body changes the food into energy.

Question 8

Heart beats is conducted by Electric Current, which originate in–

Accepted Answer

Heart. Heartbeats originate from the rhythmic pacing discharge from the sinoatrial (SA) node within the heart itself. In the absence of extrinsic neural or hormonal influences, the SA node pacing rate would be about 100 beats per minute. The function of the heart is to contract and pump oxygenated blood to the body and deoxygenated blood to the lungs.