The answer is 4. Receptor proteins are needed mostly in homeostasis, muscle activity and nerve signals.

4

Nerve cell B contains receptors which receive messages from nerve cell A. Nerve cell A conducts messages to be received by the receptors in nerve cell B. They contain axons and dendrites.

The answer is 4. Chemical reactions contain different types of ways on how a certain chemical reacts with another chemical. This process occurs in order to make different products needed in our body.

4

The answer is 4. The cell membrane separates the inside contents of a cell to the outside. This is composed of a lipid bilayer which protects it from the outside. Being a lipid, the cell membrane becomes a semi-permeable membrane.

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The answer is 4. The active transport mechanism maintains the unequal concentration of ions in each side of the cell.

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The answer is 2. Diffusion is the movement of solutes from a higher concentration to a lower concentration while facilitated diffusion is the movement of molecules across cell membranes with the aid of a protein and osmosis is the process wherein molecules move from a less concentrated solution to a more concentrated one deeming both sides equal.

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The answer is 3. Diffusion is the movement of solutes from a higher concentration to a lower concentration.

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The answer is 4. The active transport mechanism maintains the unequal concentration of ions in each side of the cell.

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The answer is 2. The active transport mechanism maintains the unequal concentration of ions in each side of the cell. This usually occurs in plant cells as their way of harvesting water from the roots.

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The answer is 2. Cellular respiration is the process of making use of nutrients not needed as building blocks to be converted to cellular energy.

2

The answer is 1. This follows the principle “where sodium goes, water follows” thus making the cells shrink. The water from inside the cell will bind to the salt placed outside the cell.

1

The answer is 1. Diffusion is the movement of solutes from a higher concentration to a lower concentration while facilitated diffusion is the movement of molecules across cell membranes with the aid of a protein and osmosis is the process wherein molecules move from a less concentrated solution to a more concentrated one deeming both sides equal.

1

The answer is 1. This is caused by the process of diffusion wherein the the movement of water is from a higher concentration to a lower concentration. This kind of change may cause stress in plants and may also cause the plant to die.

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The answer is 2. This process happens due to the principle applied “where sodium goes, water follows” thus causing the cell to shrink. This process may cause an imbalance in the environment and may cause damage to the cell.

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The answer is 3. The active transport mechanism maintains the unequal concentration of ions in each side of the cell. This is the movement of molecules from a low concentration to a higher concentration.

3

The answer is 1. This process happens due to the principle applied “where sodium goes, water follows” thus causing the cell to shrink. This process may cause an imbalance in the environment and may cause damage to the cell.

1