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What is the respiratory surface?

Important Questions on Breathing and Exchange of Gases

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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Part of epidermis that keeps out unwanted particles is called:
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Epithelial cells in animals are held by specialized junctions, one of them being "Gap junction". Function of a "Gap junction" is to
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Given below are the four schematics that describe the dependence of the rate of an enzymatic reaction on temperature. Which of the following combination is true for thermophilic and psychrophilic organisms?

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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Select the option which is not correct with respect to enzyme action:
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Which type of tissue is correctly paired with its location?
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Choose the correctly matched pair:
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Which of the following statements is true about glandular epithelium in the salivary gland?
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Study the following statements and identify the incorrect one
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Which of the following is not a function of the skeletal system?
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The function of the gap junction is to:
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Select the incorrectly matched pair from following:
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
If the number of alveoli in an individual is doubled without changing the total alveolar volume, the gas exchange capacity of the lungs will:
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals

Statement I : Tendons attach one bone with another bone.
Statement II : Epiglottis is formed by elastic cartilage.

The correct option among the following is

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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in:
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals

The graph below depicts the velocity of an enzyme-catalyzed reaction vs. substrate concentration. Identify the alphabets with the correct descriptions.

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I. A= Enzyme activity

II. B= Substrate concentration at maximum velocity

III. A= Substrate concentration at which half of the maximum velocity

IV. B= Half of the maximum velocity

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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals

Study the following statements
A) Compound epithelium forms the lining of the larger pancreatic ducts as stratified cuboidal epithelium
B) Cartilage is a vascular tissue surrounded by fibrous connective tissue sheath called perichondrium
C) Gap junctions in cardiac muscles permit electrical impulses to be conducted rapidly
D) Myelinated nerve fibres are found in grey matter of the central nervous system

Among the above, identify incorrect statements

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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Assertion (A) : Skeletal muscle fibre is in syncytial state
Reason (R):  It is formed by fusion of cells
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
Which of the following describes the given graph

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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
It is much easier for a small animal to run uphill than for a large animal, because:
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Biology>Human Physiology>Breathing and Exchange of Gases>Respiratory Organs in Animals
A person has 400 million alveoli per lung with an average radius of 0.1 mm for each alveolus. Considering the alveoli are spherical in shape, the total respiratory surface of that person is closest to