Respiratory System

Q.

Give reason: Rings of cartilages are present in trachea.

Q.

During a breathing cycle, why do lungs always contain a residual volume of air in it?

1. It makes O₂ transport efficient and faster.

2. It helps in CO₂ release slower and O₂ transport faster.

3. It gives sufficient time for CO₂ absorption and O₂ release.

4. It gives sufficient time for O₂ absorption and CO₂ release.

Q. Which of the following prevents food from entering the trachea?

1. Glottis
2. Larynx
3. Epiglottis
4. Pharynx

Q.

The pharynx opens into the larynx by a slit-like aperture called

1. Trachea

2. Glottis

3. Bronchus

4. Epiglottis

Q.

Difference between alveoli and alveolar

Q.

What is the other name of wind-pipe ?

Q.

The air passage in the respiratory system of humans does not collapse due to presence of:

1. Rings of tendons

2. Rings of ligament

3. Rings of cartilage

4. Rings of muscular tissue

Q.

The trachea divides into two tubes at its lower end. What is the name of these tubes ?

Q.

What is the name of tiny air-sacs at the end of smallest bronchioles in the lungs ?

Q.

Fill in the following blanks with suitable words :
(a) The organs of respiration in man are the___
(b) The actual exchange of gases takes place in the___ of the lungs.
(c)___ in the lungs provide a very large surface area for gaseous exchange.
(d) Yeast undergoes___ respiration whereas Amoeba undergoes___ respiration.
(e) Gills are the breathing organs in___

Q. Name the following :
(e) The cells which surround a stomatal pore.

Q.

During a breathing cycle, why do lungs always contain a residual volume of air in it?

1. It makes O₂ transport efficient and faster.

2. It helps in CO₂ release slower and O₂ transport faster.

3. It gives sufficient time for CO₂ absorption and O₂ release.

4. It gives sufficient time for O₂ absorption and CO₂ release.

Q.

Question 15
Which is the correct sequence of air passage during inhalation?

(a) $Nostrils\to larynx\to pharynx\to trachea\to lungs$
(b) $Nasalpassage\to trachea\to pharynx\to larynx\to alveoli$
(c) $Larynx\to nostrils\to pharynx\to lungs$
(d) $Nostrils\to pharynx\to larynx\to trachea\to alveoli$

Q.

Why is the rate of breathing in women and children faster than in men?

Q. How many ATPs are produced during anaerobic respiration?

1. 38
2. 28
3. 4
4. 2

Q.

during breathing cycle what is the advantage of residue volume of air in lungs ? explain

Q. Name the organ in humans which produces sound.

1. Larynx
2. Pharynx
3. Uvula
4. Bronchioles

Q.

What are the tiny air sacs in the lungs called? __

Q.

During the breathing cycle, when air is taken in and let out:

1. The lungs never contain a residual volume of air

2. The lungs always contain a residual volume of air

3. The lungs contain a residual volume of air during heavy exercise

4. The lungs sometimes contain a residual volume of air

Q. What is respiratory system? What are its functions? Also, describe the parts of the respiratory system.
(8 Marks)

Q.

Question 8 (ix)
Given below is a square of letters in which are hidden different words related to respiration in organisms. These words may be present in any direction – upwards, downwards, or along the diagonals. Find the words for your respiratory system. Clues about those words are given below the square.

(ix) An organism with tracheal system

Q. Draw a neat diagram of the stomatal apparatus found in the epidermis of leaves and label the Stoma, Guard cells, Chloroplast, Epidermal cells, Cell wall and Nucleus.

Q.

During respiration, the exchange of gases takes place in :
(a) bronchi
(b) alveoli
(c) bronchioles
(d) trachea

Q. During aerobic respiration, energy is released in a stepwise manner and ATP formation takes place with the help of this energy. What will happen if this energy is released at a single step instead of in parts?

1. Incomplete oxidation of glucose take place
2. All the amount of energy can be utilized by the cell as more ATP molecules are produced
3. Maximum amount of this energy is wasted in the form of heat and cell may die
4. Cell will follow anaerobic path of respiration

Q.

The number of lobes in the right and left lung of the man respectively are

1. $2$ and $3$

2. $3$ and $2$

3. $4$ and $2$

4. $2$ and $4$

Q.

When a person breathes in air, the air enters into his body through an organ A having two holes B in it. The air then passes through pharynx and larynx and enters into a tube C. The tube C divides into two smaller tubes D at its lower end. The two smaller tubes are attached to two respiratory organs E. Each smaller tube divides inside the organs E to form a large number of still smaller tubes called F. The smallest tubes F have air-sacs G at their ends in which gaseous exchange takes place in the body of the person. What are A, B, C. D, E, F and G ?

Q.

The actual exchange of gases in a mammal takes place in

1. Bronchi

2. Trachea

3. Bronchioles

4. Alveoli

Q.

Which of the following is the correct sequence of air passage during inhalation ?
(a) nostrils $\to$ larynx $\to$ pharynx $\to$ trachea $\to$ lungs
(b) nasal passage $\to$ trachea pharynx $\to$ lirynx $\to$ alveoli
(c) larynx $\to$ nostrils $\to$ pharynx $\to$ lungs
(d) nostrils $\to$ pharynx $\to$ larynx $\to$ trachea $\to$ alevoli

Q.

The nose has two openings called the___ , through which air enters the nasal cavity.

Q.

Vocal cords occur in_____

1. Pharynx

2. Larynx

3. Bronchial tube

4. Glottis