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Muscular System Note
| Question | Answer |
|---|---|
| Separates an individual skeletal muscle from adjacent muscled and holds it in powirion | |
| Separates an individual skeletal muscle from adjacent muscled and holds it in position | Fascia |
| Fibrous sheets madera by connective Tissues that may attach to the bone, skin, or to other connective tissues of adjacent muscles | Aponeuroses |
| A layer of connective tissue that closely surrounds each skeletal muscle | Epimysium |
| Layers of connective tissue that extends inward from the epimtsium and separates the muscle tissue into small sections | Perimysium |
| Fasicles lie within a layer of connective tissue that is in the form of a tina covering | Endomysium |
| The skeletal muscle csll is also known as a muscle ______. | Fiber |
| The cell membrane | Sarcolemma |
| The cytoplasm | Sacroplasm |
| In the sacromere, what proteins are located in each area? | Actin is in the i band and attached to the z line, myosin is in the h zone, and actin and myosin is in the a band |
| Its a synapse between a motor neuronas and the muscle fiber that controls it | Neuromuscular junction |
| An impulse travels down a motor neuron axon | Step one of the muscle contraction process |
| The motor neuron releases the neurotransmitter acetycholine (ACh) | Step two of the muscle contraction process |
| ACh binds to ACh receptors in the muscle fiber membrane | Step three of the muscle contraction process |
| The sarcolemma is stimulated. An impulse travels over the surface of the muscle fiber and deep into the fiber through the transverse tubules | Step four of the muscle contraction process |
| The impulse reaches the sarcoplasmic reticulum, and calcium channels open | Step five of the muscle contraction process |
| Calcium ions diffuse from othe sarcoplasmic reticulum into the cytosol and bind to troponin molecules | Step six of the muscle contraction process |
| Tropomyosin molecules move and expose specific sites on actin where myosin heads can bind | Step seven of the muscle contraction process |
| Cross bridges form, linking thin and thick filaments | Step eight of the muscle contraction process |
| Step nine of the muscle contraction process | |
| Step ten of the muscle contraction process | |
| During exercise oxygen is used mainly to synthesize the ATP which causes lactate to accumulate and cause a person to have a lack of oxygen | Oxygen debt |
| When a muscle is exercised for a long time may make it have a decreased ability to contract | Muscle fatigue |
| What are the differenxed between smooth and skeletal muscle? | Smooth muscles sre involuntary with no control over their contraction and relaxation where skeletal muscles are voluntary and have complete control over their contraction and relaxation. Smooth muscles are not striated and skeletal muscles are striated |
| Thin filaments are pulled toward the center of the sacromere by pulling of the cross-bridges | |
| The muscle fiber exerts a pulling force on its attachments as a contraction occurs | |
| Where is smooth muscle and cardiac muscle located? What do smooth muscle and cardiac muscles look like? How are cardiac muscles attached to each other? | Cardiac muscles are in the heart and look striated, smooth muscles are found in organs besides the heart and look smooth. Cardiac muscles attach to each other by intercalated disks. |
Created by:
Kalico2019