Are you aware that you actually (47)______ six senses The sixth is a muscular sense responsible for directing your muscles intelligently to the exact (48)______ necessary for each action you perform. For example, when you reach for an object, the sensory nerves linking the muscles to the brain stop your hand at the (49)______ spot. This (50)______ perception of the position of your muscles in (51)______ to the object is your muscular sense in action.
Muscles are stringy bundles of fibers (52)______ from one five thousandth of an inch to about three inches. They have three (53)______ characteristics: they can become shorter and thicker; they can stretch; and they can retract to their (54)______ position. Under a high-powered microscope, muscle tissue is seen as long, slender cells with a grainy texture like wood.
More than half of a person’’s body is (55)______ of muscle fibers, most of which are involuntary, in other words, work without conscious direction. The voluntary muscles, those that we move consciously to perform (56)______ actions, number more than five hundred. Women have only 60 to 70 percent as much muscle as men for their body mass. That is why an average woman can’’t lift as much, throw as far, or hit as hard as an average man.
WORD BANK
A) charge B) unique C) composed D) possess E) relation
F) automatic G) original H) extent I) acquired J) correct
K) accurately L) represent M) particular N) contains O) varying