Diffusion is the movement of molecules of solids, liquids, and gases from a place of higher concentration to a place of lower concentration as their particles moves randomly from place to place.

How do substances like CO 2 and water move in and out of the cell? Discuss.

The molecules, in general, tend to move from a place of their higher concentration to a lower concentration. This process is known as diffusion. The diffusion of water across a semi-permeable membrane is called osmosis. It can be observed between the cytoplasm of cells and extracellular fluid. The molecules such as CO 2 and water move across a cell with respect to their concentration gradient. If the concentration of CO 2 and water molecules is high within the cytoplasm of a cell as compared to extracellular fluid, they move outside the cell and vice versa.

EASY

Earn 100

The plasma membrane is porous and?

50% studentsanswered this correctly

Important Questions on Cell: Structure and Functions

EASY

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

The movement of molecules during diffusion can be described through all of the following except -

EASY

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

In simple organisms, exchange of gases and excretion occurs through –

EASY

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

The plasma membrane (pm) forms the boundary of lung cells. Which of the following statements is true for the pm?
A. Plasma membrane is a semipermeable membrane
B. Water moves across the pm by osmosis.
C. O₂ and CO₂ can cross the pm by diffusion.
D. Na⁺ and K⁺ ions can pass the pm by diffusion.

MEDIUM

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

What is diffusion ?

EASY

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

Movement of a substance from the area of low concentration to an area of high concentration is called diffusion.

EASY

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

Selective permeability identifies the process of transmission through semipermeable membrane. This is called

MEDIUM

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

What is diffusion? Write its significance?

MEDIUM

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

In active transport, carrier proteins are sensitive to inhibitors that react with:

EASY

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

In Amoeba, exchange of environmental oxygen and the body's carbon dioxide occurs by

EASY

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

The smell of hot food spreads by the process of _____. (Osmosis/Diffusion)

MEDIUM

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

Endocytosis is _____
(i) intake of extra-cellular fluid, droplets and macromolecules.
(ii) intake of extracellular particles.
(iii) Growth of plasma membrane around the particle as pseudopodia.
(iv) a nutritive process.
Select the correct option:

Note:- The options provided were not helping to choose the correct answer hence one of the option is changed.

EASY

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

Give reasons why a perfume sprayed in a corner of a room can be smelled in other parts of the room?

MEDIUM

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

How does Amoeba obtain its food?

MEDIUM

Science>Biology>Cell: Structure and Functions>Cell Structure and Function

How does carbon dioxide move in and out of cells?

EASY

Science>Biology>Cell: Structure and Functions>Cell Structure and Function