Skeletal Muscle Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Question | Answer |
What is the function of Skeletal Muscle? | Movement and Stability of Skeleton |
What is a Motor Unit/Muscle Fiber? | collection of 10-2000 Cells innervated by branches of ONE Motor Nerve |
When do Motor Units respond to a Stimulus? | when Depolarized |
What are Myofibrils? | bundles of Myofilaments |
What are Myofilaments? | Contractile Proteins - Myosin, Actin |
What are z-Lines? | Protein anchoring discs for Actin |
How does a Sarcomere shorten? | Myosin over Actin |
What are 4 characteristics of Skeletal Muscle? | 1. resting Potential (like Neurons); 2. Voluntary, quick Contraction; 3. All-or-None contraction; 4. Biochemical Specialization |
what is meant bu All-or-None Contraction? | ALL Cells of a given Motor Unit contract FULLY, Simultaneously, or not at all |
What are the 2 types of Biochemical Specialization? | SLOW-Oxidative "Red" Fibers, FAST-Glycolytic "White" Fibers |
What are some characteristics of SLOW-Oxidative Fibers? | 1. slow, Sustained contractions; 2. HIGH Myoglobin; 3. MANY Mitochondria, LITTLE Glycogen; 4. NUMEROUS Capillaries; 5. SMALL Motor Units; 6. DIFFICULT to Fatigue |
What are some characteristics of FAST-Glycolytic Fibers? | quick, Brief contractions; 2. LITTLE Myoglobin; 3. FEW Mitochondria, LOTS Glycolytic Enzymes; 4. FEW Capillaries; 5. HUGE SR; 6. HIGH Glycogen; 7. LARGE Motor Unit; 8 .LARGE Diameter; 9. EASILY Fatigued |
Name 2 Glycolytic Enzymes. | Pyruvic & Lactic Acids |
Why do "White Fibers" have a lot of Glycogen? | need because Anaerobic --> less ATP |
How does exercise change or not change Skeletal Muscle? | INCREASES Vascularity, Mitochondria, and amount of Myosin & Actin |
Created by:
Kristel
Popular Laboratory Science sets