AQA GCSE Biology Paper 2

What is Homeostasis?

• Maintaining a Stable internal Environment

• Producing Proteins

Which are the 3 main components needed for Homeostasis?

• Receptors

• Coordination Centres

• Effectors

• Enzymes

What do you get when the level of something in the body is too high or too low?

• Negative Feedback Loop

• Positive Feedback Loop

Which one is a Receptor?

• Detects the Stimulus

• Processes the information and Organises a response

• Produces a response which restores the optimum level

Which one is the Coordination Centre?

• Detects the Stimulus

• Processes the information and Organises a response

• Produces a response which restores the optimum level

Which one is an Effector?

• Detects the Stimulus

• Processes the information and Organises a response

• Produces a response which restores the optimum level

Which ones are types of Effectors?

• Muscles

• Glands

What makes up the Central Nervous System?

• Brain

• Spinal Cord

• Neurons

• Capillaries

What do Sensory Neurons do?

• Carry electrical pulses from Receptors to the CNS

• Carry electrical pulses from CNS to Effectors

• Carry electrical pulses From Sensory Neuron to Motor Neuron Inside the CNS

What do Motor Neurons do?

• Carry electrical pulses from Receptors to the CNS

• Carry electrical pulses from CNS to Effectors

• Carry electrical pulses From Sensory Neuron to Motor Neuron Inside the CNS