These eight questions move from naming to explaining to reading data. Try each one on paper before opening the answer.
The set covers the cluster on body coordination. The timed practice session builder can turn it into a timed run.
Questions
Question 1 (1 mark). Name the type of neurone that carries a signal from a receptor to the coordinator.
Answer
Sensory neurone. It carries the signal towards the spinal cord or brain.
Question 2 (2 marks). A student smells burning toast and turns her head. Name the stimulus and the receptor.
Answer
Stimulus: the chemicals from the burning toast. Receptor: the nose, specifically the smell receptors inside it.
Question 3 (2 marks). State what an effector is, with one example.
Answer
An effector is a part of the body that carries out a response after it receives a signal. Example: a muscle in the arm, or a gland that releases a substance.
Question 4 (3 marks). Write the pathway for a student who blinks when a speck flies towards the eye. Use the seven links.
Answer
Stimulus: the speck approaching. Receptor: the eye. Sensory neurone: carries the signal to the coordinator.
Coordinator: the brain or spinal cord, as your textbook example specifies. Motor neurone: carries the signal to the eyelid muscle. Effector: the eyelid muscles. Response: the eye closes.
Award the mark for the order, not only the names. State the coordinator your textbook uses for this reflex.
Question 5 (2 marks). Explain why pulling a hand away from a hot object is faster than deciding to lift a cup.
Answer
The reflex goes through the spinal cord without waiting for a decision in the brain. The shorter pathway means less time between stimulus and response.
Question 6 (3 marks). Compare nervous and hormonal coordination on speed and duration.
Answer
Nervous coordination is fast because signals travel along neurones, and the effect is short. Hormonal coordination is slower because hormones travel in the blood, and the effect lasts longer. Two contrasts plus the correct carrier earns full marks.
Question 7 (4 marks). A ruler-catching test gives these distances for one student: morning 13 cm, 12 cm, 14 cm; after a long exam 17 cm, 16 cm, 18 cm. Find the mean for each condition and state what it shows.
Answer
Morning mean: (13 + 12 + 14) ÷ 3 = 39 ÷ 3 = 13 cm. After the exam mean: (17 + 16 + 18) ÷ 3 = 51 ÷ 3 = 17 cm.
The ruler fell 4 cm further after the exam, so the response was slower in that condition. This assumes the same student and the same release method.
Question 8 (2 marks). A student writes: “Devi has a nerve problem because her ruler fell 6 cm further”. Give one reason the conclusion is not supported.
Answer
One test cannot show why a response changed, and a difference in distance does not identify a condition. The data supports only the statement that the response was slower in that trial.
If you got these wrong
Missed the order of links in questions 1 to 5: revisit tracing a simple response pathway. Missed the data questions 7 and 8: go to interpreting curriculum scenarios.
Log each error in the mistake log and paper error review so the pattern is visible. For a teacher to mark your wording, see online one-to-one Science tuition.