Physiology of Respiration

Q.

What is the main difference between breathing and respiration in humans?

Q.

Where in the lungs does gas exchange take place ?

Q. Explain the process by which inhalation occurs during breathing in human beings ?

Q.

What is the difference between breathing and respiration?

Q.

Which of the following statements are true about respiration ?
(i) during inhalation, ribs move inward and diaphragm is raised.
(ii) the gaseous exchange takes place in the alveoli.
(iii) haemoglobin has greater affinity for carbon dioxide than oxygen.
(iv) alveoli increase surface area for the exchange of gases
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)

Q. When we inhale how can we say that I have taken only oxygen in.As the air is mixture of other gases

Q. "Breathing is a rythemic process whereas exchange of gases is a continuous process"Explain

Q.

It has been found that people living in very high mountains have many more red corpuscles in their blood than people living in plains. Which one of the following best accounts for this phenomenon ?
(a) the cold climate stimulates the production of red corpuscles to keep the body warm
(b) people of high mountains breathe more quickly
(c) the low air pressure requires more red corpuscles to supply the body cells with oxygen.
(d) the low air pressure in high mountains speeds up the blood circulation so that more red corpuscles are needed

Q.

What are the functions of labeled parts [1 and 2] in the diagram?

1. 1- filtering of air, 2- maintaining shape of lungs

2. 1- Exchange of gases 2- assists in inhalation and exhalation

3. 1- storing gases, 2- exchange of gases

4. 1- absorption of gases, 2- assists in cellular respiration

Q.

Define breathing. State the differences between breathing and respiration.

Q.

Where does the blood absorb oxygen in the human body ?

Q.

Why are lungs divided into very small sac like structure?

Q.

Breathing cycle is rhythmic whereas exchange of gasses is a continuous process. Explain.

Q.

The bronchioles end up into the balloon-like structures known as the:

1. Bronchi

2. Trachea

3. Bronchioles

4. Alveoli

Q. Mention respiratory units of lungs

Q. Describe the process of respiration in the following parts of a plant:
(c) Leaves

Q. (b) From where do the aquatic animals and terrestrial animals obtain oxygen for breathing and respiration ?

Q.

Breathing rate in human is controlled by:

1. Thalamus

2. Hypothalamus

3. Cerebellum

4. Medulla oblongata

Q.

38. Why do deep sea divers carry oxygen cylinders with them?

Q.

Name the part of the lungs where exchange of gases take place.

Q.

Name the cavity in which the lungs are enclosed? What is its function? [2 MARKS]

Q.

State the differences between breathing and respiration.

Q.

Explain how, it would benefit deep sea divers if humans also had gills.

Q.

What happens to blood when it is pumped into the thin-walled blood vessels of the lungs?

Carbon dioxide is replaced with oxygen

Platelets are exchanged for plasma.

Blood fills the lungs and causes coughing

Nothing, the lungs are just a place blood goes through on its way back to the heart

Q.

State if the following statements are true or false. Correct the false statement.

The process of taking air in or out is called respiration.

1. True
2. False

Q.

Lungs are protected by _____

Q.

Which gases are exchanged in your lungs ?

Q. Why is the rate of breathing in aquatic organisms much greater than that of terrestrial organisms?

1. Aquatic organisms have a greater lung surface area than terrestrial ones
2. Aquatic organisms have a greater oxygen intake requirement than terrestrial ones
3. Amount of dissolved oxygen in water is fairly low compared to that of in air
4. Aquatic organisms have gills for oxygen intake and terrestrial organisms have lungs

Q. (c)What type of respiration takes place (i) in yeast, and (ii) in humans?

Q.

What is the importance of breathing in humans?