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SCI221-05

Week 6

QuestionAnswer
What would be the effect of poor posture? All of these are correct. leads to fatigue puts more strain on ligaments puts abnormal strain on bones interferes with respiration, heart action, and digestion All of these are correct.
A condyloid joint is an example of a(n) _____ joint. uniaxial biaxial multiaxial immovable biaxial
Muscle contractions will continue as long as: the calcium ions are attached to the troponin. there is dopamine in the neuromuscular junction. there is ADP in the muscle cell. T-tubules are transmitting impulses. the calcium ions are attached to the troponin.
The contractile unit of a muscle cell is the sarcomere. actin. myosin. myofibril. sarcomere.
Which joint allows for the widest range of movement? Gliding Saddle Ball and socket Hinge Ball and socket
Which type of joint joins the two pubic bones together? Suture Synovial Synchondrosis Symphysis Symphysis
Thick myofilaments extend the length of the: A-band. Z-line. I-band. None of the above are correct. A-band.
Endurance training is also known as: isometrics. hypertrophy. aerobic training. strength training. aerobic training.
The chief function of the T-tubules is to: provide nutrients to the muscle fiber. allow for the fiber to contract. allow for electrical signals to move deeper into the cell. allow for the generation of new muscle fibers. allow for electrical signals to move deeper into the cell.
Which type of muscle does not have T-tubules? Smooth Cardiac Striated All muscles have T-tubules. Smooth
Aerobic respiration: allows the body to avoid the use of oxygen for a short time. results in the formation of an incompletely catabolized molecule. results in the formation of lactate. produces the maximum amount of energy available from each glu produces the maximum amount of energy available from each glucose molecule.
Which of the following terms describes an isometric contraction? Eccentric contraction Static tension Concentric contraction Both A and C Static tension
White fibers are also called _____ fibers. fast slow elongated intermediate fast
After it is released from the sarcoplasmic reticulum, the calcium combines with which protein? Troponin Actin Myosin Tropomyosin Troponin
Three phases of the twitch contraction are the latent period, contraction phase, and relaxation phase. latent period, contraction phase, and stimulation phase. latent period, stimulation phase, and excitement phase. stimulation phase, contraction latent period, contraction phase, and relaxation phase.
Which of the following is not an end-product of the breakdown of ATP? An inorganic phosphate Energy that can be used in muscle contraction ADP All of the above are end-products of the breakdown of ATP. All of the above are end-products of the breakdown of ATP.
During which phase of the twitch contraction is there a triggering of the release of calcium ions into the sarcoplasm? Latent period Contraction phase Relaxation phase None of the above Latent period
The substance that attracts oxygen in the myoglobin molecule is: hemoglobin. calcium. iron. ATP. iron.
Physiological muscle fatigue may be caused by: a relative lack of ATP. high levels of lactate. failure of the sodium-potassium pumps. all of the above. all of the above.
In terms of function, which is considered an immovable joint? Synarthrosis Amphiarthrosis Diarthrosis All joints are movable. Synarthrosis
Created by: mecy1980
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