Tag: human respiration

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Questions Related to human respiration

Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Which of the following is correct

  1. Inspired air has more oxygen content
  2. Expired air has more CO$ _2$ content

  3. Expired air has high water vapour content

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Inspired air contains more oxygen whereas, the expired air contains more of carbon dioxide content as well as water vapours. Air enters with oxygen is diffused with carbon dioxide leading to the exchange of gases.

Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

The act of breathing air into the body with the help of lungs is called

  1. Ingestion

  2. Inhalation

  3. Exhalation

  4. Absorption
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The act of breathing air into the body the help of lungs is called inhalation. By this process, fresh air enters into the lungs that contain large amount of oxygen.

So the correct answer is 'Inhalation'.

Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

The large muscular sheet which forms the floor of the chest cavity is known as 

  1. Diaphragm

  2. Lungs

  3. Ribcage

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The diaphragm is a large muscular sheet which forms the floor of the chest cavity. It is a domed shaped structure made up of muscles which separate thoracic cavity and abdominal cavity.
So the correct answer is 'Diaphragm'.
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Which of the following maintains the volume of air in the chest cavity during breathing?

  1. Diaphragm

  2. Lungs

  3. Breastbone

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The diaphragm is a dome-shaped, muscular and membranous structure that separates the chest and abdominal cavities in mammals. It is the principal muscle of respiration that maintain the volume of air in the chest cavity during breathing.

So the correct answer is 'Diaphragm'.

Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Organs responsible for breathing in humans and fishes respectively are

  1. Lungs in both

  2. Gills and lungs

  3. Gills in both

  4. Lungs and gills
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Humans have lungs to carry out respiration. Lungs are ingrowths of the body wall and correct to the outside by a series of tubes and small openings.

Whereas grills are convoluted outgrowths containing blood vessels covered by a thin epithelial layer. They increase the surface area for gas exchange in fishes.
So the correct answer is 'Lungs and Gills'. 

Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

During which of the following process the diaphragm moves down?

  1. Inspiration

  2. Expiration

  3. Coughing

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During inspiration, the diaphragm moves down. The contraction of muscle fibers of the diaphragm causes it to become flat and lowered down thereby increasing the volume of the thoracic cavity in anteroposterior axis, in rabbit or lengthwise in man.

So the correct answer is 'Inspiration'

Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Ram walked for 10 minutes and Shyam ran for 100 meters. Karan is at rest. Arrange in decreasing order of breathing rate.

  1. Ram>Shyam>Karan

  2. Karan>Shyam>Ram

  3. Shyam>Ram>Karan

  4. All the 3 will have the same breathing rate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Physical activity increases the pulse rate of the body. Higher is the pulse rate, higher will be the breathing rate of a person. Shyam who ran for 100m has more pulse rate than Ram, who only walked for 10 minutes and Karan, who is at rest. So the breathing rate is also higher for Shyam than Ram and Karan.
So the correct answer is 'Shyam>Ram>Karan'.