MS1:

- A change in the internal or external environment that triggers a response (1)

MS2:

- Receptors are specialized cells/structures that detect specific stimuli (1)

- They convert the stimulus into an electrical signal/nerve impulse (1)

MS3:

- Neurones receive and transmit nerve impulses (1)

- They have a cell body, dendrites (receive impulses), and an axon (transmits impulses) (1)

- Nerve impulses are transmitted along axons as electrical signals (1)

MS4:

- Axon (1)

MS5:

- Synapses are small gaps between neurons (1)

- They allow for the transmission of nerve impulses from one neuron to another (1)

MS6:

- A reflex arc is an automatic response to a stimulus (1)

- It involves a receptor, sensory neuron, relay neuron, motor neuron, and effector (1)

- Reflex arcs help maintain homeostasis by triggering rapid responses to changes in the environment (1)

MS7:

- Insulin (1)

MS8:

- Adrenaline increases heart rate, breathing, and muscle tension (1)

- It releases stored glucose, providing energy for muscles (1)

MS9:

- The endocrine system produces and releases hormones into the bloodstream (1)

- Hormones travel to target cells and tissues to regulate a variety of functions (1)

- The system maintains hormone levels through negative feedback mechanisms (1)

MS10:

- Gibberellins (2)

- Auxins (2)