Muscular System Concept Review PDF

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Dr. Ken Sumida...

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Concept Review

MUSCULAR SYSTEM Make sure you understand the following concepts:  What are the three types of muscle?  Know the order of the skeletal muscle coverings (Superficial to Deep Layers)

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Define the following:

o Actin o Myosin o Titin o M-line o A-band o I- Band Understand what happens to the A band and I band during concentric and eccentric contractions Understand the mechanism behind skeletal muscle contraction ** Try writing mechanism out before answering questions below or looking at the attached image ** o What neurotransmitter is released from the alpha motor neuron? o What receptor does this neurotransmitter bind to? Is this an excitatory or inhibitory response? o What is the purpose of the t-tubules? o What allows for the depolarization of the DHP receptor? Is this a voltage gated or voltage sensor? Why is this significant? o What causes a conformational change in the Ryanodine Receptor (RyR) ? o What is the result of RyR pulling away from the Sarcoplasmic Reticulum? o What happens when calcium binds to troponin? o What is tropomyosin covering?

1 SI- Ixel Gastelum

HSCI 366- Fall 2019

Concept Review

MUSCULAR SYSTEM o Describe what occurs when myosin binding sites are exposed o Describe a power stroke o What is needed to unbind the myosin heads from actin?

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Know the different characteristics of Type I and Type II Muscle Fibers o Endurance vs. Strength/Speed o Speed of Contraction o Structure (Fiber Diameter) o Capillary Density o Nutrients Used o Metabolic Pathway o Rate of Fatigue and Why? o Recruitment Pattern Types of Muscle Movement o Isotonic contractions:  Concentric:  Eccentric: o Isometric contractions Length/ Tension Relationship o Is there a relationship between length of microfilament overlap and the amount of tension produced? o What are Golgi tendon organ?  How can Golgi tendon organ prevent damage to the muscle? o What are muscle spindles?  How can muscle spindles prevent damage to the muscle?

2 SI- Ixel Gastelum

HSCI 366- Fall 2019

Concept Review

MUSCULAR SYSTEM

3 SI- Ixel Gastelum

HSCI 366- Fall 2019...