# Where is diffusion found in the body?

## Where is diffusion found in the body?

The rate of diffusion is effected by a number of factors which include temperature, concentration and molecular mass. Diffusion is an important process within the human body and is essential to the transport of molecules within a number of organs including the lungs, kidneys, stomach and eyes.

## What are two variables that affect the rate of diffusion?

The two variables affecting the rate of diffusion are the concentration gradient and size of the molecule. Concentration gradient: The movement of the substance is generally along the concentration gradient of the solute and it moves from a region of its higher concentration to a region of its lower concentration.

## What makes diffusion faster?

Diffusion is faster at higher temperatures because the gas molecules have greater kinetic energy. Effusion refers to the movement of gas particles through a small hole. Graham’s Law states that the effusion rate of a gas is inversely proportional to the square root of the mass of its particles.

## Why is diffusion faster in gases?

Diffusion is driven by differences in concentration. When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air. Diffusion in gases is quick because the particles in a gas move quickly. It happens even faster in hot gases because the particles of gas move faster.

## Why is diffusion important to life?

Diffusion is important to cells because it allows them to gain the useful substances they require to obtain energy and grow, and lets them get rid of waste products.

## Does diffusion require energy?

A. Simple diffusion does not require energy: facilitated diffusion requires a source of ATP. Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concentration gradient.

## Does diffusion require oxygen?

Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane. Metabolic processes in animals and plants usually require oxygen, which is in lower concentration inside the cell, thus the net flow of oxygen is into the cell.

## What happens during diffusion?

What happens during diffusion? Particles move from an area of high concentration to lower concentration occurs during the process of diffusion. Describe the process of osmosis? Osmosis is the process in which water moves to a lower concentration to a higher concentration.

## Can diffusion be active transport?

Active Transport: molecules move across cell membranes by two major processes diffusion or active transport. Diffusion is the movement from a high concentration of molecules to a low concentration of molecules. Moving molecules with cell energy is called active transport.

## What are the similarities and differences between diffusion and active transport?

An example of diffusion is oxygen moving from the airways to the lungs – there is very little oxygen in the lungs but lots in the air. Active transport is the movement of particles from an area of low concentration to an area of high concentration. This process requires energy (ATP).

## Is diffusion active or passive transport?

Diffusion is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space. You are familiar with diffusion of substances through the air.

## What does active transport and diffusion have in common?

What do facilitated diffusion and active transport have in common? How are they different? They both change the concentration level inside and outside the cell. Active transport requires energy and moves low concentration to high concentration.

## Which best describes the difference between osmosis and diffusion?

Osmosis: Osmosis is the movement of solvent particles across a semipermeable membrane from a dilute solution into a concentrated solution. Diffusion: Diffusion is the movement of particles from an area of higher concentration to lower concentration. The overall effect is to equalize concentration throughout the medium.

## What is the major difference between diffusion and active transport?

1 Answer. simple diffusion moves molecules down concentration gradient while active transport takes them against concentration gradient. Simple diffusion is passive, which means it does not require energy, while active transport does.

## What is the major difference between passive diffusion and facilitated diffusion?

Simple diffusion does not require energy from ATP. Facilitated diffusion may or may not require energy from ATP. In simple diffusion, the molecules can pass only in the direction of concentration gradient. In facilitated diffusion, the molecules can pass both in direction and opposite of the concentration gradient.

## What are the similarities and differences among simple diffusion facilitated diffusion and osmosis?

Like simple diffusion facilitated diffusion doesn’t require metabolic energy and simply occurs across the concentration gradient. 4) Osmosis : is movement of water from hypotonic solution (lower concentration) to hypertonic solution (higher concentration) through a semi permeable membrane.

## What do simple diffusion and facilitated diffusion have in common?

They share some common characteristics which include the fact that both simple and facilitated diffusion are passive processes and therefore require no energy to take place as movement takes place down the concentration gradient of the molecules – this means that some molecules will be able to diffuse into the cell.

## What is the difference between simple diffusion facilitated diffusion and osmosis?

Simple diffusion – movement of small or lipophilic molecules (e.g. O2, CO2, etc.) Osmosis – movement of water molecules (dependent on solute concentrations) Facilitated diffusion – movement of large or charged molecules via membrane proteins (e.g. ions, sucrose, etc.)

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