The Nervous System, Senses & Responses — Drills · Grade 7 Science
Chapter: Coordination, Defense & ReproductionWhat these drills covers
By the end of The Nervous System, Senses & Responses you should be able to:
- I can explain the nervous system, senses & responses.
- I can use evidence, a model, and stated assumptions to support a biological explanation.
4 questions, multiple choice, numeric and written answer, each with a worked explanation.
Vocabulary used: stimulus, receptor, neuron, reflex, response.
Problem 1
Which is a stimulus in a light-response model?
- A change in light
- The whole graph caption
- A claim of intelligence
- The mean alone
Answer and explanation
A change in light
The light change is the input that relevant receptors can detect.
Problem 2
Find the mean of 0.3, 0.4, and 0.5 seconds.
Answer and explanation
0.4 s
(0.3+0.4+0.5)/3=1.2/3=0.4 s.
Problem 3
Is a receptor alone the whole sensory experience?
Answer and explanation
No. Signals and processing contribute to perception, interpretation, and response.
Problem 4
Why is “the brain never learns about a reflex” too strong?
Answer and explanation
A reflex can begin without conscious decision, while related information can still reach the brain.