Inspiration

Q. During inspiration the external intercostal muscles ________________ and the ribs move___________________

1. relax, upwards and outwards
2. contract, upwards and outwards
3. relax, downwards and inwards
4. contract, downwards and inwards

Q. During inspiration the volume in the lungs________________ and the intrapulmonary pressure _____________

1. increases, decreases
2. decreases, decreases
3. increases, increases
4. decreases, increases,

Q. Mark the true statement among the following with reference to normal breathing.

1. Inspiration is a passive process where as expiration is active
2. Inspiration is an active process where as expiration is passive
3. Inspiration and expiration both are active processes
4. Inspiration and expiration both are passive processes

Q.

What is the respiratory organ of humans?

Q. The contraction of ___________ muscles lifts up the ribs and the sternum causing an increase in the volume of the thoracic chamber in the dorso - ventral axis.

Q.

Which blood vessel carries blood from the kidneys back to the heart?

Q.

Explain the process of inspiration under normal conditions.

Q. Differentiate between external respiration and internal respiration.

Q.

The organs of the conducting zone of the respiratory system include all the following EXCEPT:

1. nose

2. trachea

3. bronchi

4. alveoli

Q.

The internal nares will open into the _____.

1. trachea

2. nasopharynx

3. oropharynx

4. cavity nasal

Q. Assertion :Inspiration occurs when there is a negative pressure in the lungs with respect to the atmospheric pressure. Reason: During inspiration, a decrease in pulmonary volume increases the intra-pulmonary pressure than atmospheric pressure which forces the air from outside to move into the lungs.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

The movement of ribs and diaphragm plays an important role in the breathing process.

1. True
2. False

Q.

Write any two functions of stomata.

Q. Read the following statements regarding the mechanism of respiration and choose the correct option.
$1$. Inspiration occurs only when there is negative pressure in the lungs with respect to the atmosphere.
$2$. Expiration takes place only when intrapulmonary pressure is lower than atmospheric pressure.
$3$. Pressure gradients are generated with the help of the diaphragm and intercostal muscles.
$4$. Inspiration is initiated by the relaxation of the diaphragm.
$5$. Contraction of the diaphragm reduces pulmonary volume and increases intrapulmonary pressure causing expiration.

1. $2$ only correct
2. $1,2$ and $5$ correct
3. $2,5$ correct
4. $1,3$ correct
5. $1,4$ correct

Q. Tidal volume and expiratory reserve volume of an athlete is 500 mL and 1000 mL respectively. What will be his expiratory capacity if the residual volume is 1200 mL?

1. 2700 mL
2. 1500 mL
3. 1700 mL
4. 2200 mL

Q. Which is the correct sequence of the air passage in man?

1. Nasal cavity $\to$ larynx $\to$ bronchi $\to$ pharynx $\to$ trachea $\to$ bronchioles $\to$ alveoli
2. Nasal cavity $\to$ pharynx $\to$ trachea $\to$ larynx $\to$ bronchi $\to$ bronchioles $\to$ alveoli
3. Nasal cavity $\to$ larynx $\to$ pharynx $\to$ trachea $\to$ bronchi $\to$ bronchioles $\to$ alveoli
4. Nasal cavity $\to$ pharynx $\to$ larynx $\to$ trachea $\to$ bronchi $\to$ bronchioles $\to$ alveoli

Q. During inspiration the external intercostal muscles ________________ and the ribs move_______________.

1. relax, upwards and outwards
2. contract, upwards and outwards
3. relax, downwards and inwards
4. contract, downwards and inwards

Q. What are the functions of the following in breathing?
(a) Ribs
(b) Diaphragm
(c) Abdominal muscles

Q. At high altitude, the RBC in human blood

1. Increase in size.
2. Decrease in size.
3. Decrease in number.
4. Increase in number.

Q. Which of the following sequences is correct to initiate inspiration?
(i) The contraction of external intercostal muscles raises the ribs and sternum
(ii) Volume of thorax increases in the dorso-ventral axis
(iii) Intrapulmonary pressure decreases
(iv) Diaphragm contraction
(v) Air rushes into lungs
(vi) Volume of thorax increases in the anterior-posterior axis

1. (i), (ii), (iv), (v), (iii), (vi)
2. (vi), (v), (i), (ii), (iii), (iv)
3. (i), (ii), (iii), (iv), (vi), (v)
4. (i), (ii), (iv), (vi), (iii), (v)

Q. Explain the process of inspiration and expiration under normal conditions.

Q.

Explain the process of inspiration under normal conditions.

Q. Which part of the brain act as respiratory centre and can control the process of inspiration as well as expiration?

1. Dorsal group of neurons
2. Ventral group of neurons
3. Pneumotaxic centre
4. Inspiratory centre

Q.

Mark the true statement among the following with reference to normal

breathinga. Inspiration is a passive process where as expiration is activeb. Inspiration is a active process where as expiration is passivec. Inspiration and expiration are active processesd. Inspiration and expiration are passive processes

Q. Mark the true statement among the following with reference to normal breathing.

1. Inspiration is a passive process where as expiration is active
2. Inspiration is an active process where as expiration is passive
3. Inspiration and expiration both are active processes
4. Inspiration and expiration both are passive processes

Q. Explain the mechanism of breathing with the help of labelled diagram involving both stages-inspiration and expiration.

Q. The part of alimentary canal which passes through diaphragm

1. oesophagus
2. small intestine
3. Pharynx
4. stomach

Q. Which of the following activity does not take place during pulmonary respiration?

1. Movement of buccal cavity
2. Contraction and relaxation of sternohyal and pterohyal muscles
3. Successive opening and closing of mouth and external nostrils
4. All of the above
5. No activity takes place

Q. What is breathing? Explain the mechanism of breathing.

Q. The term 'totipotency' means

1. A group of animals of unrelated characters
2. The capacity of a cell to regenerate into a whole plant
3. Hybrids formed as a result of somatic hybridization
4. Sexually produced offsprings