Unit 3.5.1 - Stimuli, both internal and external, are detected and lead to a response, Unit 3.5.2 - Coordination may be chemical or electrical in nature, Unit 3.5.3 - Skeletal muscles are stimulated to contract by nerves and act as effectors...
Cell Communication & Development + Cell Form & Function, Neuron Structure & Function + The Nervous System, Homeostasis, Endocrine System, and Human Reproductive Cycles...