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Cardiac muscle has what?
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Skeletal muscle is what?
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Muscle Test
A&P 1
| Question | Answer |
|---|---|
| Cardiac muscle has what? | intercalated discs. |
| Skeletal muscle is what? | striated. |
| Smooth looks just like what? BUT... | cardiac muscle but doesn't have intercalated discs. |
| Smallest to largest units of a muscle... | sarcomere, myofibril, muscle fiber, muscle fasicle, and THE muscle. |
| What are the three layers of a muscle? | epimysium, perimysium, & endomysium. |
| What does epimysium surround? | THE muscle. |
| What does perimysium surround? | the muscle fasicle. |
| What does endomysium surriound? | the muscle fiber. |
| The sarcoplasm is basically what? | the cytoplasm for the muscle. |
| What is the sarcolemma basically? | the cell membrane. surrounds the muscle fiber. |
| What is the sarcoplasmic reticulum? | a pouch filled with calcium. |
| What are the T tubules? | where the electronic signal travels through. |
| What is the triad? | formed by an T tubule and two terminal cisternae. |
| Thick filaments contain what? | myosin. |
| Thin filaments contain what? | actin. |
| F-actin and G-actin are? | the active sites. |
| Nebulin is what? | holds F-actin together. |
| Contraction duration depends on what three things? | duration of neural stimulus, number of free calcium ions in sarcoplasm, and availability of ATP. |
| What are the three twitch periods? | latent, contraction phase, & relaxation phase. |
| Muscle cells do not do what? | increase in number but they do increase in diameter or size. |
| Glycolysis is primarily for what? | peak muscle activity. |
| Creatine is what? | storage for excess ATP. |
| Cori cycle is what? | lactic acid removal and recycling through the liver. Converts into pyruvate to use as energy. |
| EPOC= | out of breath & repay of oxygen debt. |
| EPOC stands for what? | excess post-exercise oxygen consumption. |
| What are the functions of skeletal muscle? | produce skeletal movement, maintain posture and body position, support soft tissues, guard entrances and exits, maintain body temperature, & store nutrient reserves. |
| The collagen fibers of the epimysium, perimysium, and endomysium come together to form what? | bundles known as tendons or broad sheets called aponeuroses. |
| What is the neuromuscular junction? | is the synapse between a motor neuron and a muscle cell. This connection enables communication between the nervous system and a skeletal muscle fiber. |
| Muscle fatigue is in result from? | muscle's reduced ability to contract due to low pH, low ATP levels, or other problems. |
| What is oxygen debt? | is the amount of oxygen required to restore normal, pre-exertion conditions in muscle tissue. |
| What are the three types of skeletal muscle fibers? | fast fibers, slow fibers, intermediate fibers. |
| The connective tissue coverings of a skeletal muscle, listed from superficial to deep, are | epimysium, perimysium, and endomysium. |
| The command to contract is distributed deep into a muscle fiber by the | transverse tubules. |
| The detachment of the myosin cross-bridges is directly triggered by | the hydrolysis of ATP. |
| A muscle producing near-peak tension during rapid cycles of contraction and relaxation is said to be in | incomplete tetanus. |
| The type of contraction in which the tension rises, but the load does not move, is | an isometric contraction. |
| An action potential can travel quickly from one cardiac muscle cell to another because of the presence of | gap junctions and intercalated discs. |
| Lise the three types of muscle tissue in the body. | smooth, cardiac, and skeletal. |
| The ________ contains vesicles filled with acetylcholine. | synaptic terminal. |
| What structural feature of a skeletal muscle fiber is responsible for conducting action potentials into the inferior of the cell? | transverse tubules. |
| What five interlocking steps are involved in the contraction process? | exposure of active sties; attachment of cross-bridges; pivoting of myosin heads; detachment of cross-bridges; and activation of myosin heads. |
| What two factors affect the amount of tension produced when a skeletal muscle contracts? | both frequency of motor unit stimulation and the number of motor units involved affect the amount of tension produced when a skeletal muscle contacts. |
| What forms of energy reserves do resting skeletal muscle fibers contain? | resting skeletal muscle fibers contain ATP, creatine phosphate, and glycogen. |
| What two mechanisms are used to generate ATP from glucose in muscle cells? | aerobic metabolism and glycolysis generate ATP from glucose in muscle cells. |
| What is the calcium-binding protein in smooth muscle tissue? | calmodulin. |
| Areas of the body where you would not expect to find slow fibers include the | eye and hand. |
Created by:
danreid