ANIMAL CELL

Questions

1) How does mitochondria make energy

2) How does ribosomes make proteins

What is muscle contraction

A muscle contraction happens when muscle fibers become shorter and generate force.

• During contraction: Muscle fiber pulls together.

• The muscle becomes shorter or develops tension.

• Mucles move when Bones pull on them through tendons.

• Energy is used.

The muscular system in the body used posture and circulate the blood if we want to take something or brain commends the muscles through the nerves to move.

The heart is not controllable it it's just keep beating.

That means some muscles work without thinking.

All of the muscles in our body make up the muscles

system.

There is about 650 muscles in our body.\

Reduction

At the same time of oxidation, an atom of magnesium oxide, water, and a free electron combine to form a slightly different version of magnesium oxide.

This means it no longer needs hydroxide atoms, so it ejects it.

This type of reaction is called reduction.

More about reduction and oxidation