Tag: human respiratory system

Quizzes (0) Questions (88)

Questions Related to human respiratory system

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

In respiration, temperature

  1. Increases

  2. Decreases

  3. Remains the same

  4. Fluctuates
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. Acetyl COA

  2. Acetoacetic acid

  3. Lactic acid

  4. Cis aconitic acid
Reveal answer Fill a bubble to check yourself
A Correct answer
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).

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

Ribs move out in during

  1. Inhalation

  2. Exhalation

  3. Coughing

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

Respiratory membrane consists of.

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The respiratory membrane (alveolar-capillary membrane) consists of the alveolar epithelial wall, the capillary endothelial wall, and the fused basement membrane (interstitial space) between them.

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

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

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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.

  1. (i) and (iv)

  2. (ii) and (iii)

  3. (i) and (iii)

  4. (ii) and (iv)
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. inspiratory capacity + expiratory reserve volume

  2. total lung capacity - functional residual capacity

  3. inspiratory capacity + functional residual capacity

  4. inspiratory capacity + residual volume.
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

Abdominal breathing refers to

  1. Normal breathing

  2. Slow breathing

  3. Fast breathing

  4. Voluntary breathing
Reveal answer Fill a bubble to check yourself
A Correct answer
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.