Stimulus and Reflexes 2.0 / 5 based on 1 rating ? BiologyGCSEOCR Created by: Former MemberCreated on: 13-01-13 14:07 What is a stimulus? A stimulus is a change in the environment of an organism. 1 of 7 Why is it important to respond to a stimulus? For survival. 2 of 7 What is a simple reflex? A simple reflex is a rapid, involuntary response to a stimulus. 3 of 7 What are some examples of reflexes in humans? Knee Jerk, Pupil dilation, Grasping reflex, Swimming reflex, Stepping reflex, Suckling reflex. 4 of 7 In multicellular organisms, what is an effector? A muscle or gland. 5 of 7 Which man used conditioned to train his dog? Pavlov 6 of 7 In Pavlov's experiment what is the PRIMARY stimulus and the SECONDARY stimulus? Primary stimulus - Food Secondary stimulus- Bell ringing 7 of 7
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