Tag: evs

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Questions Related to evs

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

Which of the following does not happen in normal quiet exhalation?

  1. Contraction of internal intercostal muscles

  2. Relaxation of phrenic muscles

  3. Relaxation of external intercostal muscles
  4. Both $(2)$ & $(3)$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Exhalation is a passive process because of the elastic properties of the lungs. During forced exhalation, internal intercostal muscles which lower the rib cage and decrease thoracic volume while the abdominal muscles push up on the diaphragm which causes the thoracic cavity to contract. 

So the correct answer is 'Relaxation of phrenic muscles and Relaxation of external intercostal muscles'.

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

The number of time a person breathes in a minute is known as

  1. Respiration rate

  2. Breathing rate

  3. Combustion rate

  4. None of the above
Reveal answer Fill a bubble to check yourself
A,B Correct answer
Explanation
Breathing rate is also called respiratory rate. It is defined as the number of times a person breathes per minute. The normal respiratory rate for an adult at rest is 12 to 20 breathes per minutes. 
So the correct answer is 'Both A and B'.
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Ribs moves out during

  1. Inhalation

  2. Exhalation

  3. Coughing

  4. Both A and B
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
During inhalation, the ribs move out. This is because the external intercostal muscles are present between ribs. The contraction of these muscles lifts ribs and sternum up and outward causing an increase in the volume of the thoracic cavity in the backwards-forward direction.
So the correct answer is 'Inhalation'.
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

The average breathing rate of human beings

  1. 15-18 times

  2. 15- 25 times

  3. 10-20 times

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The breathing rate is defined as the no. of times a person breath in one minute. The normal breathing in an adult person is 15 to 18 times per minute. The increase or decease in breathing rate leads to abnormal breathing rate.
So the correct answer is '15-18 times'.
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

During which of the following activity the breathing rate is maximum?

  1. Sleeping

  2. Jumping

  3. Writing

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Breathing rate is maximum in jumping. Because heart rate is faster during jumping which makes quicker pulse. The muscles need more oxygen and more energy at this time. As level of activity increases, breathing rate increases to bring more air into the lungs so that lungs can pump more oxygen into the blood.
So the correct answer is 'Jumping'
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Which of the following process determines the breathing rate?

  1. Inhalation

  2. Exhalation

  3. Respiration

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Breathing rate is defined as the number of times a person breathes per minute. A breath counts as one exhale and inhale. The total no. of inhale and exhale in one in one minute gives breathing rate.
So the correct answer is 'Both A and B'.
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Increased breathing rate involves

  1. Greater production of energy

  2. Greater amount of oxygen

  3. Greater blood flow

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Breathing rate is defined as the no. of times a person breathes in a minute. Breathing rate increases during physical exercise. During that time the body requires a higher amount of oxygen and metabolism. 
So the correct answer is 'Both A and B'.
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Breathing rate increase during physical exercise because

  1. Cells require extra oxygen

  2. Cells require extra energy

  3. Cells require carbon dioxide

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Breathing rate is defined as the no. of times a person breathes in a minute. Breathing rate increase during physical exercise because at that time body demands a high amount of oxygen in the blood for metabolism. The body requires extra energy to carry out muscular activity.
So the correct answer is 'Both A and B'.
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Breathing rate ........... during physical exercise.

  1. Increases

  2. Decreases

  3. Remains same

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Breathing rate is defined as the no. of times a person breath in one minute. It increases during physical exercise just to fulfill the increased demand of oxygen in the body because of the physical activity and increased metabolic rate.
So the correct answer is 'Increases'.