Biology
Which of the following is a respiratory pigment ?
- Melanin
- Haemoglobin
- Chlorophyll
- None of the above
Respiratory System
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Answer
Haemoglobin
Reason — The oxygen from the lungs diffuses into the blood, and is picked up by haemoglobin in red blood cells. Carbon dioxide from the blood diffuses into the lungs and is exhaled out through the same passage.
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Related Questions
The basic structural and functional unit of the lungs is :
- Pleura
- Alveolus
- Capillary
- Diaphragm
Vocal cords are found in :
- Larynx
- Gullet
- Pharynx
- Glottis
The muscular sheet which divides the body cavity into thorax and abdomen is termed as :
- Inner pleura
- Rib cage
- Outer pleura
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Fill in the blanks with suitable words :
- The …………… emerges from the larynx down below in the neck.
- The inner lining of trachea consists of …………… epithelium.
- …………… end up into microscopic alveoli.
- The volume of chest cavity …………… during inspiration.
- The amount of …………… gas remains the same in the inspired air and expired air.