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What is the definition of osmosis?

Osmosis is the net movement of water across a partially permeable membrane. Water travels from a region of high water concentration to a region of

Answered by Charlotte L. • Biology tutor

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What is diffusion, and what factors affect it?

Diffusion is the passive movement of particles from an area of high concentration to an area of low concentration. Factors which affect it include

Answered by Umair A. • Biology tutor

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What is the importance of ADH while experiencing dehydration?

ADH, short for antiduretic hormone, is produced when the concentration of solutes in blood plasma increases - this is detected by receptors in the brain. ADH is then released into the bloodstream, where i...

Answered by Paulina W. • Biology tutor

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Describe the changes that take place in the iris when moving into a dark room.

The iris controls the diameter of the pupil to accommodate for the level of light that needs to enter the eye. When an individual moves into a dark room, the pupil must dilate to allow more light to enter...

Answered by Pauline T. • Biology tutor

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What are the consequences of smoking?

Smoking have bad long term and short term effects on a person's health due to the harmful substances in cigarettes. Firstly, it can causes emphysema. This is when the alveoli's bubbly-like shape is reduce...

Answered by Nicole L. • Biology tutor

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