SATHEE: Cell-Membrane

Active Transport

Active transport is a process by which molecules are moved across a cell membrane against a concentration gradient, requiring energy input. It is essential for maintaining cellular homeostasis and transporting nutrients, ions, and other substances into and out of cells.

The energy for active transport is derived from ATP hydrolysis, which provides the necessary power to move molecules against the concentration gradient. There are two main types of active transport: primary active transport and secondary active transport, similar to how specialized proteins move molecules.

January 1, 0001 read

Cell Wall And Cell Membrane

Cell Wall and Cell Membrane

The cell wall and cell membrane are two essential components of plant .

The cell wall is responsible for the shape of the cell and helps to protect it from damage. It also provides a barrier against infection. The cell membrane is responsible for regulating the movement of materials into and out of the cell. It also contains receptors that allow the cell to respond to its environment.

January 1, 0001 read

Diffusion

Diffusion is the net movement of .

Diffusion Definition

Diffusion Definition

Diffusion is the net movement of molecules from a region of higher concentration to a region of lower concentration. It is a passive process, meaning that it does not require energy input. Diffusion occurs due to the random motion of molecules, and it is driven by the concentration gradient.

Examples of Diffusion

The diffusion of oxygen into the lungs. Oxygen is present in the air at a higher concentration than it is in the blood. Therefore, oxygen diffuses from the air into the blood through the lungs.
The diffusion of carbon dioxide out of the lungs. Carbon dioxide is present in the blood at a higher concentration than it is in the air. Therefore, carbon dioxide diffuses from the blood into the air through the lungs.
The diffusion of water across a cell membrane. Water is present at a higher concentration outside of the cell than it is inside the cell. Therefore, water diffuses into the cell through the cell membrane.
The diffusion of glucose into a cell. Glucose is present at a higher concentration outside of the cell than it is inside the cell. Therefore, glucose diffuses into the cell through the cell membrane.

Factors that Affect Diffusion

January 1, 0001 read

Active Transport

Active Transport

Cell Wall And Cell Membrane

Cell Wall and Cell Membrane

Diffusion

Diffusion

Diffusion Definition

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Active Transport#

Cell Wall And Cell Membrane

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Diffusion

Diffusion#

Diffusion Definition#

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Mentorship

NCERT Exercise Video Solution

Forum

For International Students

Get In Touch

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Active Transport

Cell Wall and Cell Membrane

Diffusion

Diffusion Definition