Breathing

Q.

What is difference between Inhalation and exhalation?

Q.

When we breathe in, we inhale many gases, including oxygen. What happens to the gases that the body can't use?

1. They are exhaled.

2. They are changed into oxygen by the lungs.

3. They circulate through the body and are disposed of later.

4. They are absorbed into the digestive system and used to create energy.

Q.

What are the tiny air sacs in the lungs called?

1. Bladder

2. Trachea

3. Alveoli

4. Nostrils

Q.

Before setting up an experiment to show that seeds release carbon dioxide during respiration, the seeds should be

1. dried completely

2. boiled to make them soft

3. soaked in potassium hydroxide solution

4. kept moist till they germinate

Q.

Breathing is a

1. Can't be determined

2. Involuntary action

3. Both A and B

4. Voluntary action

Q.

The most powerful respiratory stimulus for breathing in a healthy person is

1. increase of carbon dioxide

2. pH (alkalosis)

3. loss of oxygen in tissues

4. pH (acidosis)

Q.

Write any two differences between breathing and respiration? [2 MARKS]

Q.

Rate and depth of respiration shall increase when

1. CO₂ concentration increases

2. O₂ concentration increases

3. HCO₃ concentration increases

4. HCO₃ concentration decreases

Q.

Why does breathing rate of a person increase?

Q.

What factors influence external respiration?

Q.

Answer the following: [3 MARKS]

(1) When does a person need artificial respiration?
(2) From where can a person get the supply of oxygen for artificial respiration?
(3) Is artificial respiration needed temporarily or permanently?

Q.

In the experiments on respiration, the seeds taken as control are boiled. Why?​

Q. Breakdown of glucose molecule into pyruvate takes place in which organelle?

1. Mitochondria
2. Nucleus
3. Vacuole
4. Cytoplasm

Q.

The breathing rate of a newborn is at its highest rate, approximately 60 breaths per minute.

1. The respiratory rate of a newborn is slow.

2. The respiratory rate of a newborn varies between male and female infants.

Q.

Question 5 (c)
Tick the correct answer:
(c) Normal range of breathing rate per minute in an average adult person at rest is:
(i) 9 – 12
(ii) 15–18
(iii) 21–24
(iv) 30–33

Q.

Lungs remove carbon dioxide from the body.

1. True
2. False

Q.

Respiration is a slow combustion process.

1. True
2. False

Q. State whether the following statements are true(T) or false(F):

(ii) No ${CO}_2$ is produced in anaerobic respiration in the human body. T/F

Q.

The process of exchange of gases between the organisms and surroundings is called

1. Transpiration

2. Anaerobic respiration

3. Breathing

4. Photosynthesis

Q.

Which of the following statements is/are correct about breathing?

Statement 1- Breathing is a voluntary process.
Statement 2-Breathing is a physical process.
Statement 3- It is known as external respiration.
Statement 4- Breathing is same as respiration.

1. Statement 1, 2 & 3 are correct.

2. Statement 1 is correct.

3. Statement 1 & 2 are correct

4. Statement 1, 2, 3 & 4 are correct.

Q.

The seeds that are used in the experiment to show that CO₂ is given out during respiration, should be

1. Dry

2. Soaked in vinegar

3. Boiled

4. Moist

Q. The following two chemical reactions are supposed to indicate a certain process occurring in the green plants under two different conditions:
(a) $C_6{H}_{12}{O}_6+6O_2\to 6C{O}_2+....+38\text{ATP}$
​ (b) $C_6{H}_{12}{O}_6\to 2C{O}_2+....+2\text{ATP}$
(ii) Name the process represented by ​ the two chemical reactions.

Q.

The main respiratory substrate used in cells is

1. Glucose

2. Galactose

3. Fructose

4. Sucrose

Q.

With the help of a diagram show the respiratory process in humans

Q.

State whether true or false:
Respiration and breathing are synonymous.

1. Breathing

2. Photosynthesis

Q.

What are the three important aspects about the overall chemical equation of respiration, pertaining to the following?’ (ii) Direct or enzyme catalysed.

Q.

How does exchange of gasses take place in the human body?

Q.

During breathing, we breathe in __ and breathe out carbon dioxide.

Q.

Breathing is an important activity of the respiratory system.

The process of breathing involves

1. Taking in oxygen and throwing out carbon dioxide from the body

2. Taking in carbon dioxide and throwing out oxygen from body

3. Throwing out carbon-dioxide only from the body

4. Breathing oxygen only into the body

Q. What is the rate of breathing per minute in an adult when he is at rest?

1. 12-18
2. 9-12
3. 21-24
4. 30-33