Tag: respiration and excretion in animals

Questions Related to respiration and excretion in animals

Which of the following correctly illustrates the passage of oxygen in the respiratory system?

respiration and excretion in animals human respiratory system evs respiration in human beings respiratory organs in humans respiration in humans

  1. Nostrils--> trachea--> bronchus--> bronchiole--> alveoli

  2. Nostrils--> trachea--> bronchiole--> alveoli

  3. Nostrils--> bronchiole--> alveoli

  4. Nostrils--> alveoli

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Correct Option: A
Explanation:
  • The pathway of air through the respiratory system is through 
nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange). Hence, Nostrils--> trachea--> bronchus--> bronchiole--> alveoli  is   the passage of oxygen in the respiratory system.
So, the correct answer is 'Nostrils--> trachea--> bronchus--> bronchiole--> alveoli'.

Diaphragm is 

respiration and excretion in animals human respiratory system evs respiration in human beings respiratory organs in humans respiration in humans

  1. Dome shaped muscle

  2. Oblique muscle

  3. Round muscle

  4. Elongated muscle

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Correct Option: A
Explanation:

  • The diaphragm is a part of the abdominopelvic cavity.
  •  It is located below the thoracic cavity and above the pelvic cavity.
  •  Its dome-shaped roof is the thoracic diaphragm, a thin sheet of muscle under the lungs, and its floor is the pelvic inlet, opening into the pelvis. Hence, the diaphragm is a dome-shaped muscle.
So, the correct answer is 'dome-shaped muscle'.

Bronchi divide into

respiration and excretion in animals human respiratory system evs respiration in human beings respiratory organs in humans respiration in humans

  1. Bronchus

  2. Bronchioles

  3. Alveoli

  4. Air sacs

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Correct Option: B
Explanation:

  • The bronchi (or bronchus) are the air passages into the lungs that begin at the end of the trachea. 
  • There are two bronchi, one for each lung. 
  • The bronchus divides into smaller branches known as segmental bronchi, which divide again into bronchioles, Hence, Bronchi divide into bronchioles.
So, the correct answer is 'bronchioles'.

Major part of $CO _2$ is transported to respiratory surface as.

respiration and excretion in animals human respiratory system evs respiration in human beings respiratory organs in humans respiration in humans

  1. $HCO _3$ ions

  2. $H _2CO _3$

  3. $Hb-CO _2$

  4. Free $CO _2$

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Correct Option: A

Respiratory system is derived from.

respiration and excretion in animals human respiratory system evs respiration in human beings respiratory organs in humans respiration in humans

  1. Endoderm

  2. Mesoderm

  3. Ectoderm

  4. None of the above

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Correct Option: A

What is correct about human respiration?

respiration and excretion in animals human respiratory system evs respiration in human beings respiratory organs in humans respiration in humans

  1. About $90\%$ of $CO _2$ is carried by haemoglobin as carbaminohaemoglobin

  2. Neural signals from pneumotaxic centre of pons can increase duration of inspiration

  3. Workers in grinding and store breaking industries may suffer from lung fibrosis

  4. Cigarette smoking leads to inflammation of bronchi

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Correct Option: B

Hypophysial portal system is present in

respiration and excretion in animals human respiratory system evs respiration in human beings respiratory organs in humans respiration in humans

  1. Frog

  2. Rabbit

  3. Humans

  4. All the above.

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Correct Option: D

Direct respiration occurs in.

respiration and excretion in animals human respiratory system evs respiration in human beings respiratory organs in humans respiration in humans

  1. Human beings

  2. Prawn

  3. Insects

  4. Fish

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Correct Option: A

Which is not function of 'conductiing part' of respiratory system?

respiration and excretion in animals human respiratory system evs respiration in human beings respiratory organs in humans respiration in humans

  1. Clears the air from foreign particles

  2. Humidifies the air

  3. Brings the air to body temperature

  4. It is site for diffusion of oxygen and carbon dioxide

  5. Transports air to alveoli

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Correct Option: D

Choose the correct statements with regard to human respiration:
(a) Inspiration is faciliated by contraction of phrenic and internal intercostal muscles
(b) Healthy human can inhale or exhale about $2000-3000$ml of air/min
(c) Functional residual capacity represents the volume of left out air in lungs after expiration
(d) Total lung capacity is the total volume of air that would be accomodated in the lunds after forced inspiration.

respiration and excretion in animals human respiratory system evs respiration in human beings respiratory organs in humans respiration in humans

  1. a, c

  2. b, d

  3. c, d

  4. a, b

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Correct Option: C