The following statements may be proposed for respiration in humans: A. Capacity of lungs depends on the height, age, sex and weight of a person. B. People born and living […]
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Club Cells: The Non-Ciliated Cuboidal Epithelial Cells in Bronchioles That Secrete Important Defense Markers
The non-ciliated cuboidal epithelial cells in bronchioles that secrete important defense markers are called (1) Goblet cells (2) Basal cells (3) Langerhans cells (4) Club cells Introduction The respiratory system […]
Pulmonary Surfactant is Primarily Synthesized by Type II Alveolar Epithelial Cells
Pulmonary surfactant is synthesized primarily by (1) Type l alveolar epithelial cells (2) Alveolar macrophages (3) Type ll alveolar epithelial cells (4) Alveolar mast cells Introduction Pulmonary surfactant is […]
Respiration Method in an Organism With Heart, Green Glands, Ganglia, and Distinct Larval Form
An organism having heart for circulation, excretes through green glands. It has several ganglia and tactile organs on its body and its larval form is very different than its adult […]
Correct Understanding of Oxygen Utilization in Cellular Respiration
In the process of respiration the oxygen inspired reaches the cells through haemoglobin of blood. A. The oxygen is used to oxidize various toxic substances in the peroxisomes. B. The […]
What Does a Left Shift in the Oxygen-Hemoglobin Dissociation Curve Represent?
When oxygen-haemoglobin curve shift to left it represents (1) Decrease in pH (2) Increase in CO2 level (3) Increase in concentration of 2,3 BPG (4) More affinity for oxygen […]
Major Function of Air Sacs in Birds: Role in Ventilation During Both Inspiration and Expiration
Birds besides lungs have highly branched air sacs, The major function of air sac is to (1) Increase surface area for gas exchange (2) Help in ventilation during inhalation (3) […]
Major Function of Surfactant Protein Secreted by the Lungs: Keeping Alveoli Inflated
The major function of surfactant protein secreted by lungs is (1) donot allow growth of bacteria (2) Stops entry of dust particles into lungs (3) Keeps alveoli inflated (4) Helps […]
Hemoglobin Carbamate Formation: Mechanism and Its Role in CO2 Transport
Hemoglobin (Hb) transports CO2 in venous blood as carbamates. The following statements refer to the formation of these carbamates: A. CO2 interacts with amino terminal nitrogens of Hb polypeptide chains […]
Transport of Oxygen and Carbon Dioxide in Blood: Hemoglobin Binding and Dissolved Forms
Transport of oxygen and CO2 in blood is (1) O2 in hemoglobin bound form and CO2 in dissolved form (2) CO2 in hemoglobin bound form and O2 in dissolved form […]


