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Week 7 Quiz 5
Masterbooks Intro to A&P Volume 1
Term | Definition |
---|---|
contract | when muscles do this, they get smaller or shorter |
contractility | means muscle tissues can contract with great force |
elasticity | means that when a muscle is stretched, it has the ability to return to its resting length |
excitability | means that muscle can respond to a stimulus or trigger |
extensibility | means that muscle can be stretched |
skeletal muscle | known as voluntary muscle, contracts on your command, is striated |
muscle fiber | also known as a muscle cell; can be very long, often extending the entire length of the muscle |
myofilaments | can be made of myosin molecules or actin molecules |
aerobic respiration | the process where glucose (sugar) is broken down with oxygen being present |
anaerobic respiration | the process where glucose (sugar) is broken down without oxygen being present |
lactic acid | diffuses out of the muscle cells and into the blood to be diposed of |
anabolic steroids | synthetic male hormones taken to enhance muscle growth and performance |
muscle tone | refers to the fact that there is some tension in a muscle even when it is not being actively contracted |
muscle atrophy | muscles that have not been used regularly for weeks get smaller |
rigor mortis | occurs after death because the muscles all over the body contract and are unable to relax |
sarcomere | the simplest contractile unit of a muscle |
thick myofilaments | these are made of myosin |
thin myofilaments | these are made of actin |
mitochondria | they convert fuel, like sugars, into usable energy |