human anatomy and physiology chapter nine muscles and muscle tiussue

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1

connective tissue covering that encloses the sarcolemma of an individual muscle fiber is called the

endomysium

2

a fascicle is a

muscle

3

contains actin

a.thick
b.thin

thin

4

contains ATPases

a.thick
b.thin

thick

5

attaches to the z disk

a.thick
b.thin

thin

6

contains myosin

a.thick
b.thin

thick

7

contains troponin

a.thick
b.thin

thin

8

does not lie in the I band

a.thick
b.thin

thick

9

the function of the t tubules in muscle contraction is to

transmit the action potential deep into the muscle cells

10

the sight where the motor nerve impulse is transmitted from the nerve endings to the skeletal muscle cell membranes are the

neuromuscular junctions

11

contraction elicited by a single brief stimulus is called

a twitch

12

a smooth sustained contraction resulting from very rapid stimulation of the muscle in which no evidence of relaxation is seen is called

fused tetanus

13

characteristics of isometric contractions

increased muscle tension throughout the contraction phase. absence of shortening. used in resistant training

14

which provides ATP fastest?

a. a couples reaction of creatine phosphate with ADP
b.aerobic respiration of glucose
c.anaerobic glycolysis

A

15

which does not require oxygen be available?

a,c

16

which provides the highest yield of ATP per glucose molecule?

b

17

which result in the formation of lactic acid?

anaerobic glycolysis

18

which has carbon dioxide and water products?

b

19

which is most important in endurance sports?

b

20

the neurotransmitter released by somatic motor neuron is

acetylcholine

21

the ions that enter the skeletal muscle cell during action potential generation are

sodium ions