10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Respiration - 2
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Detailed Solution for Test: Respiration - 2 - Question 1
Chlorophyll (also chlorophyl) is any of several related green pigments found in cyanobacteria and the chloroplasts of algaeand plants. Its name is derived from the Greek words χλωρoς, chloros Chlorophyll is essential in photosynthesis, allowing plants to absorb energy from light.
Detailed Solution for Test: Respiration - 2 - Question 2
The oxygen carried by the erythrocytes can diffuse into the plasma and then through the capillary walls to reach the cells, whereas some of the carbon dioxide produced by the cells as a waste product diffuses into the capillaries to be picked up by the erythrocytes.
Detailed Solution for Test: Respiration - 2 - Question 3
The epiglottis is a flexible flap at the superior end of the larynx in the throat. It acts as a switch between the larynx and the esophagus to permit air to enter the airway to the lungs and food to pass into the gastrointestinal tract. The epiglottis also protects the body from choking on food that would normally obstruct the airway.
Oxygen passes into the blood from the alveoli by a process called :-
Detailed Solution for Test: Respiration - 2 - Question 6
Every few seconds, with each inhalation, air fills a large portion of the millions of alveoli. In a process called diffusion, oxygen moves from the alveoli to the blood through the capillaries (tiny blood vessels) lining the alveolar walls.
Carbon monoxide has greater affinity for haemoglobin as compared to oxygen by
Detailed Solution for Test: Respiration - 2 - Question 10
Carbon monoxide binds very strongly to the iron atoms in hemoglobin, the principal oxygen-carrying compound in blood. The affinity between CO and hemoglobin is 200 times stronger than the affinity between hemoglobin and oxygen. When CO binds to the hemoglobin it cannot be released nearly as readily as oxygen would be. The preferential binding of carbon monoxide to heme iron is the main reason for carbon monoxide poisoning.
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