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Ch 9 - Lecture
Ch 9 Lecture - A&P
| Question | Answer |
|---|---|
| Which is striated and involuntary? | cardiac |
| What thin filament protein moves the blocker away from the binding site? | troponin |
| The myosin pulls the actin toward the center of what functional unit of muscle contraction? | sarcomere |
| What is the connective tissue covering that binds muscles to underlying tissue or in functional groups? | deep fascia |
| The ability to stretch? | extensibility |
| What is a smooth, sustained contraction, resulting from a number of motor neuron impulses? | tetanus |
| What external event happens to allow muscles to relax from a contraction? | acetylcholinesterase breaks down acetylcholine |
| What is the process called in which pyruvic acid is broken down in the absence of oxygen? | fermentation |
| What thin filament protein has the binding site for myosin? | actin |
| What is the purpose of T tubules? | conduct signal to contract throughout the cell |
| What is the purpose of the sarcoplasmic reticulum? | storage for calcium ions |
| What is the fascicle arrangement in which fascicles go from a broad origin to a narrow insertion? | convergent |
| What is the process of smooth muscle contraction from coordinated contraction of two muscle layers? | peristalsis |
| The ability to resume normal length after stretching? | elasticity |
| What is released when the myosin head pulls the actin? | ADP and phosphate |
| What band is made of the thin filament? | I |
| What is the term for a single motor neuron and all the muscle cells it stimulates? | motor unit |
| Which muscle is striated and voluntary? | skeletal |
| What is the fascicle arrangement in which short fascicles are attached to a central tendon? | pennate |
| What thin filament protein blocks the myosin binding site? | tropomyosin |
| Which muscle is non-striated and involuntary? | smooth |
| Where in the cell does pyruvic acid get broken down in the presence of oxygen? | mitochondria |
| What are thin filaments anchored to? | Z line |
| What is the connective tissue covering around fascicles? | perimysium |
| What is the first event that happens on the muscle cell? | binding of acetylcholine to motor end plate |
| What internal event happens to allow muscles to relax from a contraction? | calcium is pumped back into SR |
| What causes the myosin head to disengage from the actin? | binding of a new ATP |
| What is the connective tissue covering around the outside of a muscle? | epimysium |
| What event puts the myosin head into its high energy configuration? | hydrolysis of ATP |
| What protein is the thick filament made of? | myosin |
| What is the name of the neurotransmitter that stimulates skeletal muscle? | acetylcholine |
| What happens when the nerve impulse reaches the axon ending of the motor neuron? | release of neutrotransmitter into synapse |
| What is the connective tissue covering around a single muscle cell? | endomysium |
| The most energy is liberated from glucose in the presence of what substance? | oxygen |
| The ability to respond to a stimulus? | excitability |
| What disappears when muscles contract? | H zone |
| What is the process called in which pyruvic acid is broken down in the presence of oxygen? | respiration |
| What is the ability to shorten and thicken? | contractility |
| What process is it in which glucose is broken down to pyruvic acid in the cytoplasm? | glycolysis |
| What event causes the moving of the blocker from the myosin binding site? | binding of calcium to troponin |
| In the absence of oxygen, pyruvic acid is broken down to what? | lactic acid |
| What band is made of thick filament? | A |
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