Human Respiratory System : Structure and Function

Q.

Write the correct sequence of the pathway through which air travels after entering the body.

1. Larynx $\to$ Pharynx $\to$ Trachea $\to$ Bronchioles

2. Pharynx $\to$ Larynx $\to$ Trachea $\to$ Bronchioles

3. Pharynx $\to$ Larynx $\to$ Bronchioles $\to$ Trachea

4. Pharynx $\to$ Trachea $\to$ Larynx $\to$ Bronchioles

Q. Oxidation of one molecule of NADH gives rise to ATP molecules while that of one $FAD{H}_2$ molecule generates molecules of ATP.

1. two
2. three
3. four
4. five

Q.

How are gases transported in human beings?

Q. Why do infants breathe faster than adults?

Q. Lungs are covered by a two-layered membrane called .

Q. How many molecules of ATP are produced during cellular respiration?

1. 38
2. 21
3. 30
4. 42

Q.

In which of the following activities breathing rate will be fast?

1. Sleeping

   

2. Running

   

3. Reading

   

4. Walking

   

Q.

Write the path of $O_2$ from trachea to respiring tissue cell. [2 MARKS]

Q. Unscramble and match the following:

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{A}& \text{EILAOVL}& \text{1}& \text{Also called wind pipe}\\ \text{B}& \text{RATEHCA}& \text{2}& \text{Provides passage to both air and food}\\ \text{C}& \text{HMARDAIGP}& \text{3}& \text{Taking in of air}\\ \text{D}& \text{YXRNAPH}& \text{4}& \text{Muscular partition}\\ \text{E}& \text{TIOHANINAL}& \text{5}& \text{Exchange of gases}\end{array}$

1. A-5, B-2, C-4, D-1, E-3
2. A-5, B-1, C-4, D-2, E-3
3. A-5, B-2, C-3, D-1, E-4
4. A-5, B-1, C-2, D-4, E-3

Q.

What tube is used by both the digestive and respiratory systems?

1. Esophagus

2. Larynx

3. Pharynx

4. None of these

Q. In the given structure of 'energy currency' molecule, identify A, B and C.

1. A - Phosphate, B - Adenine, C - Ribose
2. A - Adenine, B - Ribose, C - Phosphate
3. A - Ribose, B - Phosphate, C - Adenine
4. A - Phosphate, B - Ribose, C - Adenine

Q. _____ are the cells that help in the transport of respiratory gases.

1. WBCs
2. Neurons
3. RBCs
4. Platelets

Q. Label the parts X, Y and Z

1. X-Nasal cavity, Y-Larynx, Z-Pharynx
2. X-Larynx, Y-Nasal cavity, Z-Pharynx
3. X-Pharynx, Y-Larynx, Z-Nasal cavity
4. X-Nasal cavity, Y-Pharynx, Z-Larynx

Q. What are the main organs of the respiratory system?

Q.

Short answer questions.
How is lung protected?

Q. Energy released by respiration is in the form of ______.

1. ATP
2. NADP
3. ADP
4. AMP

Q. Match the following
$\begin{array}{cccc}& A& & B\\ 1& Pharynx& a& Differentiatesfoodandwindpipe\\ 2& Cartilageinwindpipe& b& Connectionbetweenlarynxandtrachea\\ 3& Larynx& c& Ada{m}^{\prime }sApple\left(Voicebox\right)\\ 4& Epiglottis& d& Preventscollapseoftrachealstructure\end{array}$

1. $1\to b,2\to d,3\to c,4-a$
2. $1\to a,2\to b,3\to d,4-c$
3. $1\to b,2\to c,3\to d,4-a$
4. $1\to b,2\to a,3\to d,4-c$

Q. Which one of the following is surrounded by a rich amount of capillaries?

1. Trachea
2. Alveoli
3. Bronchi
4. Nostril

Q.

Which of the following helps prevent dust from entering the lungs?

1. Saliva

2. Mucus

3. Nose Hair

4. Tongue

Q.

Muscular sheet that forms the floor of thoracic cavity is known as ___.

1. buccal cavity

2. diaphragm

3. liver

4. kidney

Q. What is diff btw pulmonary cavity and thoracic cavity??

Q.

Lungs are capable of taking in and throwing out air because they are made up of muscles which expand and contract.

1. True

2. False

Q. What is phrenic muscles ?? ( Breathing and exchange of gases chapter )

Q.

Statement 1: Diaphragm is a muscular wall.
Statement 2: Diaphragm separates the thoracic and abdominal cavities.

1. Statement 1 is false and statement 2 is true
2. Both the statements are true
3. Both the statements are false
4. Statement 1 is true and statement 2 is false

Q.

Identify the structure in the image.

1. Diaphragm
2. Trachea
3. Alveoli
4. Bronchi

Q. Which of the following parts of the respiratory system is involved in the absorption of oxygen in the blood stream?

1. Trachea
2. Bronchi
3. Alveoli
4. Nose

Q.

Covering of lungs is known as___________ .

Q.

The internal structure of lungs looks like an inverted tree. Such a structure helps to increase surface area for absorption.

1. False

2. True

Q. Sort in the correct sequence.

1. Breathing
2. Gaseous exchange
3. Oxygen transport
4. Respiration

Q.

what will happen if the brain does not recieve oxygen for more than 4 minutes? what first aid should be given in this case?