ap chap 9 Word Scramble

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Question	Answer
during muscle contration, myosin cross bridges attach to which active sites?	actin filaments
which of the following is not a usual result of resistance exercise?	increase in the number of muscle cells
the strongest muscle contrations are normall achieved by____	increasing the stimulation up to the maximal stimulus
smooth muscle is characterized by all of the following except___	there are more thick filaments than thin filaments
muslce tone is____	a state of sustained partial contraction
the giant protein titin maintains the organization of the ___ assisting in muscle stretching	a band
which of the following is not a role of ionic calcium in muscle contration?	activates epinephrine released from adrenal gland
the sliding filament model of contration involves____	actin and myosin sliding past each other and partially overlapping
the main effect of the warm up period of athletes as the muscle contrations increase in stregth is to___	enhance the availability of calcium and the efficency of enzyme systems
which of the following surronds the individual muscle cell?	endomysium
whena muscle is unable to respond to stimuli temporarily it is in which of the following periods?	refractory period
what is the role of calcium ions in muscle contration?	bind to regulatory sites on troponin to remove contraction inhibition
what structure in skeletal muscle cells functions in calcium storgae?	sarcoplasmic reticulum
rigor morrtis occurs because____	no atp is avaliable to release attaced actin and myosin molecules
which of the following is not a way muscle contrations can be graded?	changing the type of muscle fibers involved in the contration
creatine phospate functions in the muscle cell by____	storing energy that will be transferred to adp to resynthesize atp
what part of the sacrolemma contains acetylcholine receptors?	motor end plate
which of the following is the correct sequence of events for muscle contractions?	motor neuron action potential, neurotransmitter release, muscle cell action potential, release of calcium ions from sr, atp drven power stroke, sliding myofilaments
what is the role of tropmyosin in skeletal muscles?	tropomyosin serves as a contration inhibitor by blocking the myosin binding sites on teh actin molecules
which muscle cells have the greatest ability to regenerate?	smooth
what is the functional unit of skeletal muscle called?	a carcomere
smooth muscles that act like skeletal muscles but are controlled by the autonomic nerves and hormones are	multiunit muscles
muslce tissue has all of the following properties except____	secretion
during vigorous exercise there may be insufficient oxygen available to completely break down pyruvic acid fro energy. as a result the pyruvic acid is converted to___	lactic acid
immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the___period during which the vents of excitation contraction coupling occur	latent
which of the following are composed of myosin	thick filaments
the warm up period required of athletes in order to bring their muscles to peak performance is called____	treppe
fatigued muscle cells that recover rapidly are the products of	intense exercise of short duration
what is the most distinguishing characteristic of muscle tissue?	the ability to transform chemical energy into mechanical energy
the muscle cell membrane is called the	sarcolemma
the mechanism of contraction in smooth muscle is different from skeletal muscle in taht ____	the site of calcium reguation differs
hypothetically if a muscle were stretched to the point where thick and thin filaments no longer overlapped, ___	no muscle tension could be generated
which of the following statments is true	striated muscle cells are long and cylindrical with many nuclei
which of the choices below does not descrive how recovery oxygen uptake restores metabolic conditions?	increases the level of lactic acid in the muscle
the contratile units of skeletal muscles are	myofibrils
which of the following is a factor taht affects the velocity and duartion of muscle contration	load on the fiber
which of the following statmetns is most accurate	muscle tension remains relatively constant during iso tonic contration
the term aponeruosis refers to___	a sheetlike indirect attachment to a skeletal element
after nervous stimulation stops, what prevents ACh in the synaptic cleft from continuing to stiulate contrations	acetylcholinesterase destroying the ACh
myglobin___	stores oxygen in muscles cells
excitation contration coupling requires which of the following substances?	ca2 and atp
what is the functional role of the t tubules?	enhance cellular communication during muscle contraction
which of the following describes the cells of single unit visceral muscle?	they exhibit spontaneous action potentials
which of the following is true about smooth muscle contraction?	certain smooth muscle cells can actually divide to increase their numbers
which of the following would be recruited later in muscle stimulation when contratile strength increses	motor units with alrger less excitable neurons
what controls the force of muscle contraction?	multimotor unit summation
which of the following staments is false or incorect?	caridac muscle fibers depend mostly on anaerobic cellular respiration to generate atp
the oxygen biding protein found in muscle cells is____	myoglobin
what produces the striations of skeletal muscle cell?	the arrangement of myofilaments
in an isotonic the muscle___	changes in lenth and moves the "load"
an anerobic metabolic pathway that results in the production of two net atp per glucose plus two pyruvic acid molecules is___	glycolysis
the major function of the sarcoplasmic reticulum in muscle contration is to___	regulate intracellular calcium concentration
three discrete types of muscle fivers are identified on the basis of their size, speed and endurance which of the following athletic endeavors best represents the use of red fibers	a long relaxing swim
of the following muscle types which has only one nucleus no sarcomeres and rare gap junctions	multiunit smooth muscle
most skeletal muscle contain	a mixture of fiber types
what does oxygen deficit represent?	the difference bewtween the amount of oxygen needed for totally aerobic muscle activity and the amount actually used.

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