Diffusion
Diffusion
Diffusion is the movement of particles in a substance from an area of high concentration to an area of low concentration. In simpler terms it means that the particles move from an area where there is a lot of that type of particle to an area where there is not much at all. When particles move this way, they are said to diffuse. Diffusion takes place in liquids and gases where the particles have enough energy to move around freely.
Examples :-
After eating, there is high concentration of glucose, amino acids, fatty acids and glycerol in small intestine. In the bloodstream, there are low concentration of these molecules.Most of the molecules move by diffusion from the small intestine, through cell membranes and into the blood capillaries in the villi.
The flow of blood in the capillaries quickly carries the digested material away, so there is always a higher concentration in the small intestine and lower concentration in the blood. Hence, diffusion continues.
When gases like carbon dioxide and oxygen accumulate inside the cell, their concentration is greater inside compared to the external environment. Due to this difference in concentrations, their net movement is to the outside by diffuse, i.e., from their region of higher concentration to lower concentration.
·Similarly, when the concentration is greater outside, and
move inside the cell from the external environment following the principle of diffusion. In unicellular organisms, transport of gases by diffusion occurs all over the cell membrane, e.g., Chlamydomonas, Paramecium, Amoeba, etc.
Transport of gases inside the cell is done with the help of which type of process ? | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following are correct : (a) Passive transport is the movement of a solute from a region of high concentration to a region of low concentration. (b) Active transport is the movement of a solute from a region of high concentration to a region of low concentration. (c) Active transport is the type of transport in which there occur movement of substances from region of low concentration to high concentration against the concentration gradient. | |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
