Multiple Choice QuestionsWhich one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?
One can breathe out air totally without oxygen
One can breathe out air through eustachian tubes by closing both the nose and the mouth
One can consously breathe in and breathe out by moving the diaphragm alone, without moving the ribs at all
One can consously breathe in and breathe out by moving the diaphragm alone, without moving the ribs at all
Bulk of carbon dioxide (CO2) released from body tissue into the blood is present as
bicarbonate in blood plasma and RBCs
free CO2 in blood plasma
70% carbamino - haemoglobin and 30% as bicarbonate
70% carbamino - haemoglobin and 30% as bicarbonate
Listed below are four respiratory capacities (1-4) and four jumbled respiratory volumes of normal human adult
|
|
Respiratory Capacities |
Respiratory volumes |
|
1 |
Residual volume |
2500 mL |
|
2 |
Vital capacity |
3500 mL |
|
3 |
Inspiratory reserve volume |
1200 mL |
|
4 |
Inspiratory capacity |
4500 mL |
|
Respiratory Capacities |
Respiratory volumes |
|
Residual volume |
2500 mL |
|
Vital capacity |
3500 mL |
|
Inspiratory reserve volume |
1200 mL |
|
Inspiratory capacity |
4500 mL |
(2)2500 mL, (3) 4500 mL
(3) 1200 mL, (4) 2500 mL
(4) 3500 mL, (1) 1200 mL
(4) 3500 mL, (1) 1200 mL
The energy -releasing metabolic process in which substrate is oxidised without an external electron acceptor is called
glycolysis
fermentation
aerobic respiration
aerobic respiration
Aerobic respiratory pathway is appropriately termed
catabolic
parabolic
amphibolic
amphibolic
Reduction is vascular tissue, mechanical tissue and cuticle is characteristic of
xerophytes
mesophytes
epiphytes
epiphytes
What is the vital capacity of our lungs?
Inspiratory reserve volume plus tidal volume
Total lung capacity minus expiratory reserve volume
Inspiratory reserve volume plus expiratory reserve volume
Inspiratory reserve volume plus expiratory reserve volume
Increased asthmatics attacks in certain seasons are related to
hot and humid environment
eating fruits preserved in tin containers
inhalation of seasonal pollen
inhalation of seasonal pollen
People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude of 5400 metres have around 8 million. This is because at high altitude:
people get pollution-free air to breathe and more oxygen is available
atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survive
there is more UV radiation which enhances RBC production
there is more UV radiation which enhances RBC production
The majority of carbon dioxide produced by our body cells is transported to the lungs
dissolved in the blood
as bircarbonates
as carbonates
as carbonates
B.
as bircarbonates
In our body, the blood transports the CO2 in three ways:
(i) Majority of carbon dioxide produced (70%) in our cells is transported in the form of bicarbonates. In this way first, the CO2 that dissolves in blood plasma reacts with water forming carbonic acid which dissociates into hydrogen and bicarbonate ions.
(ii) About 7% of all the CO2 of transported by blood from tissues to the lungs is in dissolved state in plasma.
(iii) About 23% of CO2, collected from cells through tissue fluids, is transported by blood in the form of carbamino compound, carbamino-haemoglobin (CO2HHb).
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