Select all of the following events that are part of a muscle contraction. A. Sarcomeres shorten B. The distance between Z discs decreases C. The distance between Z discs increases D. Thin myofilaments pull thick myofilaments toward the center of the sarcomere E. Thick myofilaments pull thin myofilaments toward the center of the sarcomere Select all of the factors that determine the shape of an action potential graph A. voltage-gated potassium channels B. voltage-gated sodium channels C. sodium-potassium pumps D. ligand-gated potassium channels E. ligand-gated sodium channels Select all of the following tissues that combine to make each skeletal muscle a discrete organ. A. Nervous tissue B. Skeletal muscle tissue C. Loose and dense connective tissue D. Hyaline cartilage E. Vascular tissues (blood vessels)
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Step 1: Sarcomeres shorten due to the sliding of actin along myosin filaments. Show more…
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3) Slow twitch muscle fibers: a) have characteristically high myoglobin levels, b) are fatigue resistant, c) have few mitochondria, d) a & b, e) a & c. 4) Lo represents: a) optimal sarcomere overlap, b) longest sarcomere length, c) shortest sarcomere length, d) suboptimal sarcomere overlap, e) none of the above. 5) The latch property of smooth muscle refers to the ability of smooth muscle to maintain: a) the rate of ATP production after stimulation, b) maintaining force production while decreasing the rate of energy utilization, c) force in the absence of myosin light chain phosphorylation, d) an entirely relaxed state independent of free Ca++ levels, e) a decreased membrane potential. 6) Which of the following will increase stroke volume: a) reduced activity of cardiac sympathetic nerves, b) increased arterial pressure, c) reduced end diastolic volume, d) low extracellular Ca2+, e) increased ventricular filling pressure.
Adi S.
Which of the following is not a type of muscle? A, Hyaline B. Cardiac C. Skeletal D. Smooth 2.For muscle contraction to occur, ______________ is released from the sarcoplasmic reticulum and binds with ____________ . A) sodium, tropomyosin B) calcium, troponin C) calcium, tropomyosin D) sodium, troponin 3) Match the function to the correct body system. A) Skeletal system B) Muscular System 1. Protects the brain, spinal cord and rib cage. 2. Maintains posture and joint stability 3. Heat production for temperature homeostasis 4. Stores minerals and lipids (fat) 4) Which type of muscle is involuntary, non-striated and found in the walls of hollow organs such as the intestines and blood vessels? Why is it important for body homeostasis that this type of muscle is involuntary?
Sukhada S.
Match the terms with their definitions. __________tendon __________muscle twitch __________myoglobin __________joint __________myosin __________red marrow __________metacarpals __________ligament __________sarcoplasmic reticulum a. stores and releases calcium b. all in the hands c. blood cell production d. holds bones in place at joint e. area of contact between bones f. motor unit response g. reversibly binds oxygen h. connects muscle to bone i. binds ATP and converts it to ADP and phosphate
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