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Simple diffusion/facilitated diffusion requires special membrane proteins.

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Facilitated diffusion
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ZOOLOGY S-Material B. Life cycle of Ascaris lumbricoides: 1. After copulation in the small intestine the female releases about two lakh eggs daily. 2. Each egg is surrounded by a rippled protein coat and hence it is called mammillated egg. 3. These mammillated eggs are passed out along with faecal matter. 4. In the moist soil, development takes place inside the eggs and first stage rhabditiform larva is produced. 5. It undergoes first moulting and 2nd stage rhabditiform larva is formed. The 2nd stage larva is the infective stage to man formed by first moulting. 6. These eggs reach a new host through contaminated food and water. 7. In the small intestine, the shell gets dissolved and larva is released. Here larva undertakes extra intestinal migration. 8. It reaches the liver through hepatic portal vein. 9. Then it goes to heart through post caval vein. 10.It reaches lungs through pulmonary arteries. 11. The second moulting take place in alveoli of lungs and 3rd stage larvae are formed. 12. The third moulting take place in alveoli of lungs and 4th stage larvae are formed. 13. It reaches the small intestine through bronchi, trachea, larynx, glottis, pharynx, oesophagus and stomach. ● 14. Fourth moulting (final moulting) takes place in small intestine and then becomes young round worm. 15. It attains sexual maturity in 8 to 10 weeks. Pathogenicity: Ascaris causes ascariasis. When the infection is heavy it can cause Nutritional deficiency, severe abdominal pain and stunted growth in children. 우 4th mouiting Small intestine Stomach Oesophagus Pharynx Glottis Larynx Trachea Bronchi 109 Young one 4th stage larva 3rd moulting 3rd stage larva 6.BIOLOGY IN HUMAN WELFARE 40 2nd moulting Reaches alveol Adult worms Extra intestinal migration Mammitated egg. Development takes place in the soil, inside the egg to produce 1st stage rhabditiform larva that undergoes 1st moulting 2st stage rhabditiform larva which reaches a new host by contamination Shell getsissolved in the small intestine Reaches liver through hopatic portal vein
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Question Text
Simple diffusion/facilitated diffusion requires special membrane proteins.
Updated OnMar 29, 2023
TopicTransport in Plants
SubjectBiology
ClassClass 11
Answer TypeText solution:1 Video solution: 1
Upvotes245
Avg. Video Duration3 min