Tag: human respiratory system

Questions Related to human respiratory system

In respiration, temperature

zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. Increases

  2. Decreases

  3. Remains the same

  4. Fluctuates

Show answer
Correct Option: A
Explanation:

Respiration can be cellular and physiological. Cellular respiration takes place in individual cells while physiological respiration is a bulk process. Cellular respiration takes place through a set of metabolic reactions and in the cells which converts biochemical energy from the nutrients into ATP and releases wastes. These reactions are catabolic reactions that releases energy and heat in the process.

Pyruvic acid is converted into a compound before formation of oxaloacetic acid in the citric acid cycle, this compound is

zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. Acetyl COA

  2. Acetoacetic acid

  3. Lactic acid

  4. Cis aconitic acid

Show answer
Correct Option: A
Explanation:

The end product of glycolysis is pyruvic acid. The next step is the formation of acetyl coenzyme A (acetyl CoA). Acetyl CoA is the initiator of the citric acid cycle. In carbohydrate metabolism, acetyl CoA is the link between glycolysis and the citric acid cycle. The initiating step of the citric acid cycle occurs when a four-carbon compound (oxaloacetic acid) condenses with acetyl CoA (2 carbons) to form a citric acid (6 carbons).

Ribs move out in during

zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. Inhalation

  2. Exhalation

  3. Coughing

  4. None of the above

Show answer
Correct Option: B
Explanation:

  • Relaxation of the diaphragm and the inter-costal muscles returns the diaphragm and sternum and ribs move into their normal positions and reduce the thoracic volume and thereby the pulmonary volume. 
  • This leads to an increase in intra-pulmonary pressure to slightly above the atmospheric pressure causing the expulsion of air from the lungs, i.e., expiration. Hence, ribs move out in during exhalation.
So, the correct answer is 'exhalation'.

Brown coloured respiratory pigment is?

zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. Chlorocruorin

  2. Pinnaglobin

  3. Haemocyanin

  4. Myoglobin

Show answer
Correct Option: B

Respiratory membrane consists of.

zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. Alveolar wall and ducts

  2. Membrane of alveolar ducts and capillaries

  3. Inner and outer pleural membranes and pleural fluid

  4. Alveolar wall, alveolar capillary and interstitial space

Show answer
Correct Option: D

When we breathe in air, nitrogen also goes inside along with oxygen. What is the fate of this nitrogen?

zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. It moves along with oxygen into the cells.

  2. It comes out with the $CO _{2}$ during exhalation.

  3. It is absorbed only by the nasal cells.

  4. Nitrogen concentration is already more in the cells so it is not at all absorbed.

Show answer
Correct Option: B
Explanation:

Breathing is an act of ventilating a respiratory surface with air. Breathing is usually accomplished through muscular movements that can be divided into inspiration (intake of air ) and expiration (outflow of air). The composition of inhaled air is 20.94 % oxygen, 0.04 % carbon dioxide, 79.02 % nitrogen and trace gases. The composition of exhaled air is 16.49 % oxygen, 4.49 % carbon dioxide, 79.02 % nitrogen and other trace gases. The nitrogen is an inert gas, during breathing, there is no change in nitrogen percentage in inhaled as compared to exhaled air.

Which of the following statement(s) is (are) true about respiration?
(i) During inhalation, ribs move inward and diaphragm is raised.
(ii) In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from blood into alveolar air.
(iii) Haemoglobin has greater affinity for carbon dioxide than oxygen.
(iv) Alveoli increase surface area for exchange of gases.

zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. (i) and (iv)

  2. (ii) and (iii)

  3. (i) and (iii)

  4. (ii) and (iv)

Show answer
Correct Option: D
Explanation:

During inhalation, diaphragm contraction occurs which induces the lower ribs to move upward and forward, which also increases thoracic volume. The ribs move outward because the central tendon of the diaphragm (at the crown of the dome) pushes down onto the liver and stomach, which act like a fulcrum. Oxygen enters into the alveoli. Alveoli, is the site for gaseous exchange and they increase the surface area for facilitating the process. 
Carbon monoxide has 210 times greater affinity for haemoglobin than oxygen. Thus, the correct answer is option D.


Breathing:

zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. ventilates lungs

  2. draws air into airways

  3. expels air from airways

  4. all of these

Show answer
Correct Option: D
Explanation:

Breathing is the process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, by bringing in oxygen & expelling out carbon dioxide.

So, the correct option is 'all of these'.

The inspiratory reserve volume + tidal volume + expiratory reserve volume is the same as

zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. inspiratory capacity + expiratory reserve volume

  2. total lung capacity - functional residual capacity

  3. inspiratory capacity + functional residual capacity

  4. inspiratory capacity + residual volume.

Show answer
Correct Option: A
Explanation:

Inspiratory reserve volume (IRV) + tidal volume (TV) + expiratory reserve volume (ERV) represents vital capacity (VC). Now, inspiratory capacity is the total volume of air that can be inhaled after a normal expiration. It includes tidal volume and inspiratory reserve volume i.e., IC = TV + IRV. Thus, option (a) is correct which says that vital capacity/.e., IRV + TV + ERV = IC + ERV.

Abdominal breathing refers to

zoology respiratory system phases in respiration human respiratory system parts of respiration

  1. Normal breathing

  2. Slow breathing

  3. Fast breathing

  4. Voluntary breathing

Show answer
Correct Option: A
Explanation:

Diaphragmatic or abdominal breathing is the normal pattern of breathing at rest: the abdomen protrudes as the diaphragm is lowered. It is done by contracting the diaphragm, a muscle located horizontally between the chest cavity and stomach cavity. Air enters the lungs and the belly expands during this type of breathing.This deep breathing is marked by expansion of the abdomen rather than the chest when breathing.