Coordination and Response

Worked examples (12)extended set

• 1Central and peripheral nervous system
• 2Sensory, relay or motor neurone?
• 3Relay neurone and effector in a reflex arc (multiple choice)
• 4Saliva as a reflex response
• 5Labelling a synapse
• 6Events at a synapse in order (multiple choice)
• 7Where a motor neurone receives its signal
• 8Ruler-drop reaction test
• 9Two drugs that act at synapses
• 10Impulse speed and synapse delay
• 11Predicting the effect of nerve damage
• 12Why reflexes are faster than voluntary responses

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) extended-response style

Worked examples (12)extended set

• 1Identifying the parts of the eye on a section
• 2Sense organs as groups of receptor cells
• 3The pupil reflex and the antagonistic iris muscles
• 4Describing and calculating from pupil-diameter data
• 5Accommodation: from a distant object to a near one
• 6Multiple choice: ciliary muscles that cannot contract
• 7Rods and cones across the retina: reading a distribution graph
• 8The fovea, colour vision and seeing in dim light
• 9Suggesting which animal is active at night from receptor data
• 10Planning and processing a pupil-reflex investigation
• 11Multiple choice: from reading in bright light to stargazing
• 12Suggesting why a stiffer lens makes reading difficult

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) extended-response style

Worked examples (12)extended set

• 1Naming endocrine glands and their hormones on a body outline
• 2Multiple choice: comparing nervous and hormonal control
• 3Finding the source of glucagon and adrenaline in the abdomen
• 4Heart rate after a fright: describing and calculating
• 5How adrenaline supplies extra energy for a sprint
• 6Multiple choice: the effects of adrenaline
• 7Classifying responses as nervous or hormonal from data
• 8Identifying a gland from hormone concentrations in blood
• 9Multiple choice: statements about glucagon
• 10A startle investigation: processing pulse-rate results
• 11Calculating the extra blood flow caused by adrenaline
• 12Suggesting the effects of a gland that over-secretes adrenaline

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) extended-response style

Worked examples (12)extended set

• 1Reading a body temperature graph and the set point
• 2Identifying structures in a section of skin
• 3Multiple choice: skin responses on a cold day
• 4Explaining how the body loses heat after a race
• 5Completing a negative feedback loop
• 6Pancreas and liver: roles in blood glucose control
• 7Using a day's blood glucose record to predict hormone secretion
• 8Comparing blood glucose curves and a percentage decrease
• 9Outlining the treatment of Type 1 diabetes
• 10An insulation investigation with tubes of hot water
• 11Why sweating cools less well in humid heat
• 12Low blood glucose after exercise in Type 1 diabetes

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) extended-response style

Worked examples (12)extended set

• 1Multiple choice: which tropism acts on seedlings in the dark?
• 2Investigating gravitropism in roots with pinned seeds
• 3Auxin collected from shoot tips in light and dark
• 4Multiple choice: a potted plant knocked onto its side
• 5Explaining clinostat results for horizontal shoots
• 6What decapitated shoots show about where auxin is made
• 7Cell lengths on the lit and shaded sides of a shoot
• 8Planning a phototropism investigation
• 9Describing and calculating from a curvature graph
• 10Multiple choice: agar blocks on one side of cut shoots
• 11Explaining barrier experiments on shoot tips
• 12Interpreting a dose–response graph for auxin

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 6 (Alternative to Practical) style
• ✓Model answer — Paper 4 (Extended) extended-response style