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BIO 348 Exam 2 WWU questions with correct answers
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BIO 348 Exam 2 WWU questions with correct answers
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BIO 348 Exam 2 WWU questions with correctanswers
Which of the following most accurately describes the innervation of
skeletal muscle Correct Answer-Motor neurons communicate with the
muscle fiber directly
Perimysium Correct Answer-the connective tissue that surrounds
bundles (fascicles) of skeletal muscle cells.
The function of calcium ions in skeletal muscle contraction is to Correct
Answer-bind to regulatory proteins leading to a change in shape so that
the myosin binding sites on the actin can be exposed
The contractile proteins within a muscle fiber (cell) are Correct Answer-
actin and myosin
individual muscle fibers (cells) are arranged in bundles called Correct
Answer-fascicles
Each muscle fiber is divided or compartmentalized into repeating
segments of contraction called Correct Answer-sarcomeres
the ends of the sarcomere, where there are ONLY thin filaments Correct
Answer-I band
actin, troponin, tropomyosin Correct Answer-thin filaments
, myosin Correct Answer-thick filament
Aponeurosis Correct Answer-extension from a muscle that forms a
broad flat sheet
tendon Correct Answer-extension from a muscle that connects the
muscle to bone
motor unit recruitment Correct Answer-when the muscle fibers need to
get more help (increasing number of motor units in a contraction)
t-tubules Correct Answer-outpocketings of the plasma membrane
nervous system Correct Answer-responsible for all behaviors, memories,
and movements
central nervous system Correct Answer-consists of the brain and spinal
cord
Normal heart sounds are caused by which of the following events?
Correct Answer-closure of the heart valves
cardiac reserve... Correct Answer-can be improved by regular exercise
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