What is Homeostasis?
Homeostasis is the process of maintaining a balanced internal environment for survival.
Negative Feedback Loop
- A loop in which your body senses a change and works to reverse that change, bringing it back to normal or stable level.
Difference between Reflex and Reaction
A reflex is an involuntary response Which does not involve the brain and is much quicker, Whereas a reaction is a voluntary response which means that it involves the CNS (brain and spinal cord) to react to some thing and takes a longer time than a reflex.
What are Dendrites?
Branches of neurons that receive signals from other neurone
Myelin Sheath
Protects the axon and insulates the electrical impulse
Axon Terminal
button like endings of axons which make contact with other nerve cells
Axon
transmits messages away from cell body
Nucleus
Where DNA is stored and also controls and regulates the activities of a cell.
Target Cell
A specific type of cell in the body that has receptors for a particular hormone.
Glucagon
A hormone released by the pancreas that increase the level of glucose in the blood.
Glycogen
When sugar levels drop, glycogen is broken down into glucose to provide a quick source of energy for the body.
Hormones
Chemical messages that are released from the endocrine glands and into the bloodstream.
Endocrine Glands
A group of cells that produce and release chemicals (hormones) into the bloodstream.
Pineal Gland
The pineal gland helps your body feel drowsy/tired and fall asleep.
Endocrine System
The endocrine system uses hormones to send messages, whereas the nervous system uses electrical signals.
Insulin
Insulin is a hormone which helps to regulate the blood sugar levels.
