Gas Exchange In Humans
Muhtasari
Every cell in your body is burning glucose right now, and to do it they all need a steady supply of oxygen and a way to get rid of carbon dioxide. Your lungs are the organ that makes this exchange happen, trading gases with the air millions of times a day without you ever thinking about it.
In this lesson you will see how the lungs are built for fast diffusion, trace the path air takes from your nose to the alveoli, find out exactly how breathed-in air differs from breathed-out air, and learn how your ribs and diaphragm pump air in and out. You will also discover the clever cleaning system that keeps dust and germs out of your lungs.
Malengo
- Describe the features of gas exchange surfaces in humans, limited to: large surface area, thin surface, good blood supply and good ventilation with air
- Identify in diagrams and images the following parts of the breathing system: lungs, diaphragm, ribs, intercostal muscles, larynx, trachea, bronchi, bronchioles, alveoli and associated capillaries
- Investigate the differences in composition between inspired and expired air using limewater as a test for carbon dioxide
- Describe the differences in composition between inspired and expired air, limited to: oxygen, carbon dioxide and water vapour
- Investigate and describe the effects of physical activity on the rate and depth of breathing
- [Supplement] Identify in diagrams and images the internal and external intercostal muscles
- [Supplement] State the function of cartilage in the trachea
- [Supplement] Explain the role of the ribs, the internal and external intercostal muscles and the diaphragm in producing volume and pressure changes in the thorax leading to the ventilation of the lungs
- [Supplement] Explain the differences in composition between inspired and expired air
- [Supplement] Explain the link between physical activity and the rate and depth of breathing in terms of: an increased carbon dioxide concentration in the blood, which is detected by the brain, leading to an increased rate and greater depth of breathing
- [Supplement] Explain the role of goblet cells, mucus and ciliated cells in protecting the breathing system from pathogens and particles
Somo la Sauti
Sikiliza somo hili kwenye programu
Ramani ya mawazo
Mada hii imechorwa ili uone jinsi mawazo yanavyounganika.
Fungua ramani ya mawazo kwenye programu
Kadi za kumbukumbu
Mazoezi ya haraka ya kumbukumbu kuhusu kinachopimwa katika mada hii.
Fanya mazoezi ya kadi hizi kwenye programu
Maelezo ya Somo
Dokezo Kamili la Somo Linapatikana kwenye Programu ya Green Bridge
Pata programu ya Green Bridge CBT kwenye simu au kompyuta yako kwa maktaba kamili ya IGCSE: mitihani ya miaka iliyopita, miongozo ya usahihishaji, ramani za mawazo, kadi za marudio na masomo ya sauti.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Gas Exchange In Humans. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Which feature of the alveoli does NOT speed up gas exchange? A. a large surface area B. a thick muscular wall C. a thin wall D. a good blood supply Answer: B
- Compared with inspired air, expired air contains: A. more oxygen and less carbon dioxide B. less oxygen and more carbon dioxide C. more oxygen and more carbon dioxide D. less oxygen and less carbon dioxide Answer: B
- Which test shows that expired air contains more carbon dioxide? A. iodine turns blue-black B. Benedict's turns brick-red C. limewater turns milky D. biuret turns purple Answer: C
- During inspiration the diaphragm: A. relaxes and moves up B. contracts and moves down C. stays domed D. is not involved Answer: B
- The correct order of structures for air entering the lungs is: A. trachea, larynx, bronchus, alveolus B. larynx, trachea, bronchus, alveolus C. bronchus, trachea, larynx, alveolus D. alveolus, bronchus, trachea, larynx Answer: B
Fanyia kazi maswali haya kwenye programu
Fanyia kazi maswali haya kwenye programu
Vitabu Vinavyopendekezwa
Jifunze zaidi kutoka vyanzo huria
-
Sehemu ya kitabu
Systems of Gas Exchange
Describe the passage of air from the outside environment to the lungs
"Biology: Systems of Gas Exchange" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/39-1-systems-of-gas-exchange. Access for free at https://openstax.org/books/biology/pages/1-introduction
-
Sehemu ya kitabu
Breathing
Describe how the structures of the lungs and thoracic cavity control the mechanics of breathing
"Biology: Breathing" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/39-3-breathing. Access for free at https://openstax.org/books/biology/pages/1-introduction
Vimechapishwa na mashirika mengine chini ya leseni huria na vinatajwa kama wanavyoomba. Viungo hufungua tovuti zao.
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Gas Exchange In Humans? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
Pakua Programu Kwenye Google Playstore
Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.
