Diffusion
Akopọ
Open a bottle of perfume in one corner of a room and soon you can smell it everywhere. The scent particles have spread out by diffusion, moving from where they were crowded to where they were sparse, with no pump or effort. Your cells use this same free process every second to take in oxygen and get rid of carbon dioxide.
In this lesson you will learn exactly what diffusion is, where its energy comes from, why it is vital to living organisms, and how surface area, temperature, concentration gradient and distance change its rate.
Awọn Afojusun
- Describe diffusion as the net movement of particles from a region of their higher concentration to a region of their lower concentration (i.e. down a concentration gradient), as a result of their random movement
- State that the energy for diffusion comes from the kinetic energy of random movement of molecules and ions
- State that some substances move into and out of cells by diffusion through the cell membrane
- Describe the importance of diffusion of gases and solutes in living organisms
- Investigate the factors that influence diffusion, limited to: surface area, temperature, concentration gradient and distance
Ẹ̀kọ́ Ohùn
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Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Diffusion. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- Diffusion is the net movement of particles: A. from low to high concentration B. from high to low concentration C. only of water D. using energy from respiration Answer: B
- The energy for diffusion comes from: A. respiration in the cell B. active transport C. the kinetic energy of the particles D. sunlight Answer: C
- Which change would speed up diffusion? A. lower temperature B. smaller surface area C. steeper concentration gradient D. greater distance Answer: C
- A larger surface area increases the rate of diffusion because: A. particles move slower B. more particles can cross at once C. the gradient disappears D. energy is added Answer: B
- Which substance does NOT normally cross the cell membrane by diffusion? A. oxygen B. carbon dioxide C. large protein molecules D. water Answer: C
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Passive Transport
Explain why and how passive transport occurs
"Biology: Passive Transport" 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/5-2-passive-transport. Access for free at https://openstax.org/books/biology/pages/1-introduction
Àwọn àjọ mìíràn ló tẹ̀ wọ́n jáde lábẹ́ ìwé àṣẹ ṣíṣí, a sì dá wọn lọ́lá bí wọ́n ṣe béèrè. Àwọn ìjápọ̀ ń ṣí ojú òpó wọn.
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Diffusion? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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