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Mrs. T's Muscles '15
| Question | Answer |
|---|---|
| describe skeletal muscle | striated voluntary, multinucleated, non-branching |
| describe smooth muscle | non-striated, involuntary |
| describe cardiac muscle | striated, involuntary, interconnecting fibers |
| functional unit of contraction, from Z line to Z line | sarcomere |
| if a muscle is out of oxygen, thus ATP, what develops? | cramps |
| type of muscle in blood vessel walls, stomach wall | smooth |
| type of muscle in heart | cardiac |
| type of muscle in arms and legs | skeletal |
| reserve source of energy for prolonged contraction | creatine phosphate |
| 4 functions of muscles | maintain body temp, move fluids through body systems, guard exit of some organs, move body |
| bulge of the calf is due to what muscle? | gastrocnemius |
| a muscle that remains in a contracted state | tetanus |
| the thick filament | myosin |
| has a high affinity for calcium ions | troponin |
| what muscle do you use when shaking your head no? | sternocleidomastoid |
| obeys the all-or-none law | muscle fiber only |
| type of contraction where shortening of a muscle causes movement | isotonic |
| function of the masseter muscle | chewing |
| this muscle extends the forearm | triceps brachii |
| what causes acetylcholine to be released from the axon? | a nerve impulse |
| stores calcium ions | sarcoplasmic reticulum |
| when contracting, cross-bridges pull the actin... | toward the center of the sarcomere |
| contain acetylcholine | synaptic vesicles |
| calcium ions interact with... | troponin-tropomyosin complex |
| smaller muscle on one side due to cast | disuse atrophy |
| methods used to name muscles | direction of fibers, location, shape |
| responsible for muscle relaxation | calcium is pumped back into SR, using ATP |
| extension of sarcolemma which carries action potential deep into muscle fiber | T tubule |
| what does myosin do during relaxation | cross-bridges break, disengaging the actin, which slides back |
| ability to lift 100 lbs would be increased by what type of exercise | resistance |
| cramps due to lack of oxygen after strenuous activity are caused by... | build-up of lactic acid |
| if acetylcholine receptors on the motor end plate are blocked, what happens? | muscle cannot respond to stimuli from the nerve |
| series of biophysical events that result in shortening of sarcomere | sliding filament theory |
| know the correct order of biochemical events that occur during muscle contraction | |
| be able to label the following on diagrams: cardiac, smooth, skeletal muscle, sarcolemma, sarcoplasm, nucleus, striations | |
| know anterior and posterior muscle diagrams |
Created by:
thomase
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