Hondros Bio 117 Exam 2 With 100% Correct Answers

What is myelin and why do we have it? {Ans: Myelin is a lipid that surrounds axons, this insulates the axon and also makes signals travel faster}If a muscle is a synergist to another muscle, what does this mean? {Ans: Its action is the same as the muscle}What specific receptors are found in your cardiac muscle that would respond to me telling you a bear was about to rip your head off? {Ans: Beta-1}If a muscle is an antagonist to another muscle, what does this mean? {Ans: Its action is opposite to the muscle}What is the function of the Sarcoplasmic Reticulum? {Ans: To store and release calcium for muscle contraction}What is happening during depolarization? {Ans: Sodium rushing in}