Tag: respiration in organism

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Questions Related to respiration in organism

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

The number of times a person breathes in a minute is called as

  1. Inhalation

  2. Respiratory rate

  3. Breathing

  4. Breathing rate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The number of times a person breathes in a minute is called breathing rate. The normal breathing rate for an adult at rest is 12-20 breathes per minute. Breathing rate below and above this range indicates the diseased condition of a person.
So the correct answer is 'Breathing rate'.
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

The two organisms which breathe only through their moist skin are.

  1. Frog and Earthworm

  2. Fish and Frog

  3. Fish and Earthworm

  4. Leech and Earthworm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Frogs and earthworms are classic examples of organisms that utilize cutaneous respiration, meaning they breathe through their moist skin. While frogs also have lungs, their skin is a primary respiratory surface, and earthworms rely entirely on cutaneous respiration.

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

Dead space is

  1. Upper respiratory tract

  2. Nasal chambers

  3. Alveolar space

  4. Lower respiratory tract
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Dead space of the respiratory system refers to the space in which oxygen ($O _2$) and carbon dioxide ($CO _2$) gasses are not exchanged across the alveolar membrane in the respiratory tract. 
  • Anatomic dead space specifically refers to the volume of air located in the segments of the respiratory tract that are responsible for conducting air to the alveoli and respiratory bronchioles but do not take part in the process of gas exchange itself. 
  • These segments of the respiratory tract include the upper airways, trachea, bronchi, and terminal bronchioles.
So, the correct option is 'Upper respiratory tract'.
Multiple choice evs respiration in organism human respiration the mechanism of breathing breathing and its movements

Rate of breathing is controlled by.

  1. Amount of freely available oxygen

  2. Carbon dioxide in blood

  3. Stress

  4. Muscular functions of the body

  5. All the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The rate of breathing in humans is primarily regulated by the concentration of carbon dioxide in the blood. Chemoreceptors detect changes in CO2 levels and pH, signaling the brain to adjust the ventilation rate to maintain homeostasis.

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

People migrated from planes to hills six months back.

  1. Possess more RBCs with haemoglobin of low $O _2$ binding affinity
  2. Possess same RBCs with haemoglobin of high $O _2$ binding affinity

  3. Lose physical fitness to play games like football

  4. Suffer from altitude sickness with nausea and fatigue
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

At high altitudes, the partial pressure of oxygen is lower. To compensate for the reduced oxygen availability, the body increases the production of red blood cells and alters hemoglobin affinity to facilitate better oxygen delivery to tissues.

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

Which is true?

  1. Abdominal breathing is predominant in women

  2. Thoracic breathing is predominant in men

  3. Both A and B

  4. Thoracic breathing is predominant in women
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Physiological studies have historically observed that abdominal breathing is more common in women, while thoracic (chest) breathing is more common in men. This is a general anatomical and physiological trend.

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

Between breaths the interpleural pressure is approximately _______mm Hg less than atmospheric pressure.

  1. $1$
  2. $4$
  3. $8$
  4. $10$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The intrapleural pressure is normally negative relative to atmospheric pressure to keep the lungs inflated. This pressure is typically about 4 mm Hg lower than the atmospheric pressure between breaths.