Coordination and Response

Worked examples (4)

• 1Sequence of components in a reflex arc
• 2Why a reflex action is faster than a voluntary action
• 3Explain how a nerve impulse is transmitted across a synapse
• 4Why synapses ensure one-way transmission

Worked examples (4)

• 1Describe pupil size change when entering dim light
• 2Explain how the eye focuses on a near object
• 3State the difference between rods and cones
• 4Explain why there is a blind spot in the eye

Worked examples (4)

• 1Explain how blood glucose concentration is lowered after a meal
• 2Distinguish between Type 1 and Type 2 diabetes
• 3Explain why adrenaline is described as the fight or flight hormone
• 4Compare nervous and endocrine systems in terms of speed and duration

Worked examples (4)

• 1Explain negative feedback in homeostasis
• 2Explain skin redness and sweating in thermoregulation
• 3Describe how the kidney regulates water content of the blood
• 4Why dialysis patients must restrict certain foods

Worked examples (4)

• 1Explain why a shoot bends toward light
• 2Describe an experiment to demonstrate phototropism
• 3Adaptive advantage of positive phototropism in shoots
• 4Difference between positive and negative geotropism