organisms respond to changes in their internal and external environments
By: Taylor Brennan
3.6.1 stimuli, both internal and external, are detected and lead to a response, 3.6.2 nervous coordination, 3.6.3 skeletal muscles are stimulated to contract by nerves and act as effectors...
Skeletal System Lesson 1 Structure of the skeletal system and the major bones, Muscular System Lesson 6 Additional Factors, Muscular System Lesson 5 Short-term responses to exercise...