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Bio |/ 161 |/Exam |/ 4 |/Review |/questions |/with
|/correct |/answers
muscle |/fiber |/- |/CORRECT |/ANSWERS |/✔✔an |/individual |/muscle |/cell fasicle |/- |/CORRECT |/ANSWERS |/✔✔a |/group |/of |/muscle |/cells |/within |/the |/belly |/of |/a |/muscle sarcolemma |/- |/CORRECT |/ANSWERS |/✔✔plasma |/membrane |/of |/skeletal |/muscle |/cells sarcoplasm |/- |/CORRECT |/ANSWERS |/✔✔the |/cytoplasm |/of |/a |/skeletal |/muscle |/cell sarcomere |/- |/CORRECT |/ANSWERS |/✔✔Contractile |/unit |/of |/a |/muscle |/cell |/that |/make |/a |/myofibirl sarcoplasmic |/reticulum |/- |/CORRECT |/ANSWERS |/✔✔Modified |/endoplasmic |/reticulum |/that |/regulates |/calcium |/in |/the |/cell T |/(transverse) |/tubules |/- |/CORRECT |/ANSWERS |/✔✔Tubes |/continuous |/with |/the |/sarcolemma |/to |/increase |/surface |/area
myofibril |/- |/CORRECT |/ANSWERS |/✔✔The |/major |/component |/of |/a |/muscle |/cell |/(takes |/up |/the |/most |/intracellular |/volume) myoglobin |/- |/CORRECT |/ANSWERS |/✔✔Oxygen-binding |/protein |/in |/a |/muscle |/cell multi |/nucleate |/- |/CORRECT |/ANSWERS |/✔✔Containing |/many |/nuclei epimysium |/- |/CORRECT |/ANSWERS |/✔✔Fibrous |/connective |/tissue |/that |/is |/continuous |/with |/the |/tendon Which |/type |/of |/muscle |/cell(s) |/is |/(are) |/striated? |/Choose |/all |/that |/apply. |/- |/CORRECT |/ANSWERS |/✔✔skeletal, |/cardiac Skeletal |/muscle |/tends |/to |/contain |/short, |/branched |/cells. |/T |/or |/F? |/- |/CORRECT |/ANSWERS |/✔✔False, |/Skeletal |/muscle |/cells |/tend |/to |/be |/very |/long |/and |/cylindrical. The |/neuromuscular |/junction |/(or |/synapse) |/involves |/with |/of |/the |/following |/two |/cell |/types? |/- |/CORRECT |/ANSWERS |/✔✔neuron:skeletal |/muscle
If |/calcium |/protein |/channels |/in |/the |/sarcoplasmic |/reticulum |/(SR) |/open |/in |/response |/to |/an |/action |/potential, |/calcium |/diffuses |/out |/of |/the |/sarcoplasm |/and |/into |/the |/SR. T |/or |/F? |/- |/CORRECT |/ANSWERS |/✔✔False, |/Calcium |/concentrations |/are |/high |/in |/the |/sarcoplasmic |/reticulum |/(due |/to |/calcium |/pumps). |/If |/protein |/channels |/are |/opened |/(like |/what |/occurs |/during |/an |/action |/potential |/of |/a |/skeletal |/muscle |/cell), |/the |/calcium |/will |/diffuse |/into |/the |/sarcoplasm. Which |/of |/the |/following |/protein |/interact |/during |/a |/"cross-bridge" |/formation? |/Please |/choose |/all |/that |/apply. |/- |/CORRECT |/ANSWERS |/✔✔Actin, |/Myosin Which |/of |/the |/following |/protein |/hydrolyzes |/ATP |/during |/contraction? |/- |/CORRECT |/ANSWERS |/✔✔Myosin What |/two |/roles |/does |/ATP |/play |/during |/the |/contraction |/stage? |/Choose |/all |/that |/apply. |/- |/CORRECT |/ANSWERS |/✔✔Release |/myosin |/from |/actin |/active |/sites. |/and |/To |/cause |/myosin |/to |/change |/shape |/to |/the |/cocked |/(extended) |/position. At |/the |/neuromuscular |/junction, |/an |/electrical |/signal |/from |/the |/motor |/neuron |/is |/translated |/to |/a |/chemical |/signal |/and |/then |/back |/to |/an |/electrical |/signal |/in |/the |/muscle |/cell. |/What |/proteins |/interact |/with |/the |/released |/chemical |/to |/cause |/the |/electrical |/signal |/in |/the |/muscle |/cell? |/- |/CORRECT |/ANSWERS |/✔✔Cation |/chemical-gated |/channels
Which |/of |/the |/following |/processes |/directly |/require |/binding |/of |/or |/the |/use |/of |/ATP? |/Choose |/all |/that |/apply. |/- |/CORRECT |/ANSWERS |/✔✔Release |/of |/cross-bridge |/(interaction) |/between |/actin |/and |/myosin. Movement |/of |/calcium |/ions |/back |/into |/the |/sarcoplasmic |/reticulum |/after |/contraction. Conformation |/change |/of |/myosin |/from |/the |/bent |/conformation |/to |/the |/extended |/(activated) |/conformation. Where |/are |/mechanical-gated |/channels |/found |/in |/the |/process |/of |/muscle |/contraction? |/- |/CORRECT |/ANSWERS |/✔✔The |/sarcoplasmic |/reticulum What |/would |/happen |/if |/someone |/stabbed |/your |/leg |/with |/a |/syringe |/full |/of |/calcium |/and |/injected |/the |/calcium |/directly |/into |/the |/sarcoplasm |/of |/your |/muscle |/cells? |/- |/CORRECT |/ANSWERS |/✔✔Cross-bridges |/would |/form |/in |/the |/absence |/of |/an |/action |/potential |/from |/a |/motor |/neuron. Acetylcholine |/esterase |/- |/CORRECT |/ANSWERS |/✔✔breaks |/down |/acetylcholine |/in |/the |/synaptic |/cleft Troponin |/- |/CORRECT |/ANSWERS |/✔✔Binds |/to |/calcium Tropomyosin |/- |/CORRECT |/ANSWERS |/✔✔Directly |/covers
In |/living |/tissue, |/it |/is |/observed |/that |/all |/sarcomere |/resting |/length |/falls |/within |/the |/optimal |/range. T |/or |/F? |/- |/CORRECT |/ANSWERS |/✔✔False Skeletal |/muscles |/cells |/have |/a |/large |/concentration |/of |/free |/ATP |/available |/for |/power |/contractions |/over |/long |/periods |/of |/time. T |/or |/F? |/- |/CORRECT |/ANSWERS |/✔✔False Which |/molecule |/acts |/as |/an |/energy |/reserve |/that |/can |/be |/used |/to |/synthesize |/ATP |/from |/ADP? |/- |/CORRECT |/ANSWERS |/✔✔creatine |/phosphate Which |/of |/the |/following |/three |/process |/we |/will |/discuss |/occurs |/in |/the |/mitochondria? |/- |/CORRECT |/ANSWERS |/✔✔Aerobic |/respiration Which |/of |/the |/three |/processes |/produce |/will |/sustain |/exercise |/over |/long |/periods |/of |/time? |/- |/CORRECT |/ANSWERS |/✔✔Aerobic |/respiration During |/short, |/high |/intensity |/exercise, |/oxygen |/cannot |/be |/delivered |/to |/the |/muscles |/at |/the |/same |/rate |/it |/is |/being |/used. |/Which |/process |/is |/used |/to |/synthesize |/ATP |/in |/this |/situation? |/Choose |/all |/that |/apply. |/- |/CORRECT |/ANSWERS |/✔✔Glycolysis |/and |/Creatine |/phosphate |/transfer
