Hormones and nerves Flashcards
How are they sent round the body?
They are directly released into the blood and travel all over the body but they only affect particular cells. These cells are called target cells but they have the right receptors to respond to that hormone.
What are neurones?
Neurones are never cells that transmit information as electrical impulses around the body.
What are the branched ending called?
Dendrons, so they can connect with lots of other neurones.
How is the electrical impulse passed along?
It is passed along the axon of the cell.
What is a myelin sheath?
Myelin sheath is a electrical insulator along the axon which helps stop the impulse getting lost and also speeds up the electrical impulse.
Why are neurones long?
So the impulse is passed quicker because if you had lots of small ones connecting with another neurone it would slow it down.
What is the connection called between two neurones?
Synapse
How is the nerve impulse transmitted?
By chemicals called neurotransmitters which diffuse across the gap.
What are hormones?
Hormones are chemicals produced in various glands.
