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PDF Download FREE ANATOMY AND STUDY GAMES ABOUT A&P - CH 9
EXAM QUESTIONS
Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -492 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: in smooth muscle, thick & thin filaments are __ __ allowing muscles to contract in __ __; thus peristalsis
Answer:
arranged diagonally; twisting way
Question 2: change in resting potential is
Answer:
depolarization
Question 3: smooth muscle can __ more than other muscle types
Answer:
shorten Question 4: granules of stored glycogen that provide glucose during periods of muscle cell activity
Answer:
glycosomes
Question 5: smooth muscle is found in
Answer:
walls of blood vessels, digestive, urinary, respiratory & reproductive tracts
Question 6: eccentric contractions are about 50% __ __ than concentric ones
Answer:
more forceful
Question 7: end plate potential
Answer:
electrical event occurring only at neuromuscular junction
Question 8: force exerted by contracting muscle on an object
Answer:
muscle tension
Question 9: in order to phosphorylate myosin, calmodulin interacts with
Answer:
myosin kinase/myosin light chain kinase Question 10: a functional characteristic of muscle fiber type, according to ATP-forming pathways
Answer:
oxidative or glycolytic fibers
Question 11: muscle pain resulting from any muscle disorder
Answer:
myalgia
Question 12: each skeletal muscle fiber is controlled by a neuron at a single
Answer:
NMJ
Question 13: smooth muscle cells
Answer:
single, fusiform, uninucleate; no striations
Question 14: wave summation contributes to __ force
Answer:
contractile Question 15: smooth muscle fibers run around circumference of organ; contraction constricts lumen causing it to elongate
Answer:
circular layer
Question 16: skeletal muscles account for at least 40% of
Answer:
body mass Question 17: relationship btwn length of fiber & force that fiber produces at that length; permits sliding along nearly entire length of thin filaments
Answer:
ideal length-tension relationship
Question 18: long thread-like extensions of somatic motor neurons
Answer:
axons
Question 19: moderately weak but sustained muscle activity
Answer:
endurance exercise Question 20: variations in degree of muscle contraction by changing either frequency/strength of stimulus
Answer:
graded muscle responses
Question 21: 2 ATP produce
Answer:
per glucose broken down
Question 22: sustained spasm, or tetanic contraction
Answer:
cramp
Question 23: example of slow oxidative fibers
Answer:
muscles maintaining posture; activities- running a marathon Question 24: found in airways, large arteries, internal eye muscles; have individual NMJs & muscle fibers independent of each other
Answer:
smooth muscle multiunit Question 25: muscles that control fine precise movements e.g. fingers, eyes (few muscle fibers) have
Answer:
small motor units Question 26: produces movement, maintains posture, stabilizes joints, generates heat, etc.
Answer:
muscle functions
Question 27: composed of spindle-shaped fibers w/central nuclei
Answer:
smooth muscle Question 28: lactic acid is more important in provoking __ fatigue than __ fatigue
Answer:
central; physiological
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