Life Processes Test

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Life Processes Test - 53

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Weekly Quiz Competition

Question 1
1 / -0

Dialysis machine is also called:

A
Artificial lung

B
Artificial kidney

C
Artificial heart

D
Artificial brain

Solution

An artificial kidney is a device that helps in cleaning the blood of a patient whose kidneys have failed to perform their functions.
In this procedure, blood drained from an artery is pumped into a dialysing unit. The unit contains coiled cellophane tubes surrounded by dialysing fluid. The fluid has the same composition as that of the blood except for the nitrogenous wastes. The semi-permeable cellophane membrane of the tube allows the passage of molecules based on concentration gradient. As nitrogenous wastes are absent in the dialysing fluid, these substances freely move out, thereby clearing the blood. The cleared blood is pumped back to the body through a vein.
So, the correct answer is oprion B
Question 2
1 / -0

Why do we pass more urine in wet and cold season?

A
Impairment of water absorption by nephrons.

B
Kidney becomes more active.

C
Sweating is much decreased.

D
ADH secretion is increased.
Solution
- When the weather is hot, our body system tries to keep our body cool by evaporating the water along with unwanted things (sweating) through the skin in the form of perspiration.
- So, skin helps the kidney by sharing its work of cleaning the body in hot weather.
- In cold conditions, as sweating is much decreased, there is no perspiration and the kidney has to bear the entire burden of excretion and hence we urinate frequently.
Question 3
1 / -0

Which among the following helps in protecting the lungs?

A
Ribs

B
Vertebral column

C
Sternum

D
All of the above

Solution

The lungs are situated in the thoracic chamber. It is protected dorsally by the vertebral column, ventrally by the sternum, laterally by the ribs and on the lower side by a dome-shaped diaphragm which contracts and relax to adjust the pulmonary volume during inspiration and expiration.
So, the correct answer is option D.
Question 4
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Identify the correct pathway of blood circulating in the body.

A
Right atrium$$\rightarrow$$ Right ventricle $$\rightarrow$$ Lungs $$\rightarrow$$ Left atrium $$\rightarrow$$ Left ventricle $$\rightarrow$$ Body

B
Right atrium $$\rightarrow$$ Left ventricle $$\rightarrow$$ Body $$\rightarrow$$ Right atrium $$\rightarrow$$ Lungs $$\rightarrow$$ Right ventricle

C
Left atrium $$\rightarrow$$ Left ventricle $$\rightarrow$$ Lungs $$\rightarrow$$ Right atrium $$\rightarrow$$ Right ventricle $$\rightarrow$$ Body

D
Right atrium $$\rightarrow$$ Left ventricle $$\rightarrow$$ Lungs $$\rightarrow$$ Left atrium $$\rightarrow$$ Right ventricle $$\rightarrow$$ Body

Solution

The right atrium receives deoxygenated blood from the body through the vena cava. Right atrium contracts and passes the blood to the right ventricle. The right ventricle contracts and the deoxygenated blood is carried by the pulmonary artery to the lungs. After the exchange of gases in the lungs, the deoxygenated blood becomes oxygenated blood and is then carried by the pulmonary vein to the left atrium. The left atrium contracts and passes the oxygenated blood to the left ventricle. The left ventricle contracts and the oxygenated blood is pumped through the aorta which divides into arteries and then the oxygenated blood reaches various parts of the body.
So, the correct answer is option A.
Question 5
1 / -0

Respiration occurs in:

A
All living cells, both in light and dark

B
Non green cells, only in light

C
Non green cells, in light and dark

D
All living cells, in light only

Solution

Most eukaryotes and prokaryotes carry out aerobic respiration, in the presence of oxygen. This process is independent of light and is characteristic of all living cells. During aerobic respiration, nutrients are catabolized to carbon dioxide and water. Thus, the correct option is A.
Question 6
1 / -0

Sphygmomanometer measures:

A
Blood pressure

B
Pulse rate

C
Rate of heart beat

D
All of the above

Solution

Blood pressure is the pressure exerted by the flowing blood on the elastic walls of arteries. The instrument used to measure blood pressure is called a sphygmomanometer.
So, the correct answer is option A.
Question 7
1 / -0

In a normal man, blood pressure is

A
120/80mm of Hg

B
80/100 mm of Hg

C
80/120 mm of Hg

D
100/80 mm of Hg
Solution
- Blood pressure is defined as the pressure applied by the blood on the walls of arteries and veins during circulation. The instrument used is called a sphygmomanometer.
- the normal blood pressure of a healthy person is 120/80 mm/Hg.
So, the correct answer is option A.
Question 8
1 / -0

Pulmonary veins are those which carry:

A
Impure blood from lungs to heart

B
Pure blood from lungs to heart

C
Impure blood from heart to lungs

D
Pure blood from heart to lungs

Solution

The pulmonary veins carry pure blood that is oxygenated blood from the lungs to the left atrium of the heart. Despite carrying oxygenated blood, this great vessel is still considered a vein because it carries blood towards the heart. This is an exception to all the other veins in the body.
So, the correct answer is option B.
Question 9
1 / -0

Systolic pressure is higher than diastolic pressure due to

A
Volume of blood in the heart is greater during systole

B
Arteries contract during systole

C
Blood vessels offer resistance to flowing blood during systole

D
Blood is forced into arteries during systole

Solution

Blood pressure is the pressure applied on the arteries and veins during the circulation. The instrument used is called a sphygmomanometer and two variables are measured as follows
1. Systolic pressure, which occurs during heart muscle contraction which forces blood into arteries, averages around 120mmHg and is expressed in millimeters of mercury (mm Hg).
2. Diastolic pressure, which occurs during relaxation of the heart muscle, averages around 80 mm Hg.
So, the correct answer is option D.
Question 10
1 / -0

Which of the following does not have valves?

A
Arteries

B
Veins

C
Heart

D
All of the above

Solution

Veins carry deoxygenated blood (except pulmonary vein) from various parts of the body to the heart. The blood in veins flows with less pressure. Therefore, veins have valves to prevent the backflow of blood.
The arteries carry blood from the heart to the other body parts. The blood in arteries flow at high pressure and so the blood flows only in one direction. So, arteries do not require valves as the chances of backflow are less.
The heart has valves between the atria and ventricles. They prevent the backflow of blood from the ventricles to the atria.
So, the correct answer is option A.

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Re-Attempt Weekly Quiz Competition

Life Processes Test - 53

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Life Processes Test - 53

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SHARING IS CARING

Question 1

Artificial lung

Artificial kidney

Artificial heart

Artificial brain

Solution

Question 2

Impairment of water absorption by nephrons.

Kidney becomes more active.

Sweating is much decreased.

ADH secretion is increased.

Solution

Question 3

Ribs

Vertebral column

Sternum

All of the above

Solution

Question 4

Right atrium$$\rightarrow$$ Right ventricle $$\rightarrow$$ Lungs $$\rightarrow$$ Left atrium $$\rightarrow$$ Left ventricle $$\rightarrow$$ Body

Right atrium $$\rightarrow$$ Left ventricle $$\rightarrow$$ Body $$\rightarrow$$ Right atrium $$\rightarrow$$ Lungs $$\rightarrow$$ Right ventricle

Left atrium $$\rightarrow$$ Left ventricle $$\rightarrow$$ Lungs $$\rightarrow$$ Right atrium $$\rightarrow$$ Right ventricle $$\rightarrow$$ Body

Right atrium $$\rightarrow$$ Left ventricle $$\rightarrow$$ Lungs $$\rightarrow$$ Left atrium $$\rightarrow$$ Right ventricle $$\rightarrow$$ Body

Solution

Question 5

All living cells, both in light and dark

Non green cells, only in light

Non green cells, in light and dark

All living cells, in light only

Solution

Question 6

Blood pressure

Pulse rate

Rate of heart beat

All of the above

Solution

Question 7

120/80mm of Hg

80/100 mm of Hg

80/120 mm of Hg

100/80 mm of Hg

Solution

Question 8

Impure blood from lungs to heart

Pure blood from lungs to heart

Impure blood from heart to lungs

Pure blood from heart to lungs

Solution

Question 9

Volume of blood in the heart is greater during systole

Arteries contract during systole

Blood vessels offer resistance to flowing blood during systole

Blood is forced into arteries during systole

Solution

Question 10

Arteries

Veins

Heart

All of the above

Solution

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