B5 - Knowledge Organiser Questions Flashcards
The knowledge organiser questions in the back of the B5 - Homeostasis TRIPLE booklet
What is the function of the nervous system?
It enables organisms to react to their surroundings and co-ordinates behaviour
What are the 2 parts of the central nervous system?
Brain and spinal cord
Why are reflex actions described as rapid and automatic?
They do not involve the conscious part of the brain
Why are reflex actions important?
For survival and to prevent damage to the body
Give the pathway of the nervous system
stimulus -> receptor -> coordinator -> effector -> response
What is a stimulus?
A change in the internal or external environment
What is a synapse?
Junction between neurones allowing impulses to cross
What is the function of neurones?
Carry the electrical impulses around the body
What is homeostasis?
Maintenance of a constant internal environment
Why is homeostasis important?
Maintains optimal condition for cell and organ function and enzyme activity
Give three internal conditions controlled in homeostasis
Body temperature, blood glucose concentration, and water levels
Give three things all control systems include
Receptors, coordination centres, and effectors
Name the three coordination centres
Brain, spinal cord, pancreas
Name two types of effectors
Muscle and glands
What is the endocrine system?
System of glands that secrete hormones into the blood