Muscles- Chapter 3

Question 1

contractility

Answer 1

unique to muscles
most important characteristic
(capability of shrinking or contracting)

Question 2

extensibility

Answer 2

allows muscles to work in opposition

capability of being stretched

Question 3

what creates movement

Answer 3

ONLY contraction of muscle tissue

Question 4

3 types of tissue

Answer 4

skeletal/ striated
smooth/ non-striated
cardiac/ striated/ heart

Question 5

skeletal/ striated

Answer 5

-skeletal muscle
-voluntary
-striated
gives body shape
innervated along full length
multi nucleated
spindle shaped - 1 to 40 mm

Question 6

smooth/ non-striated

Answer 6

-visceral muscle (blood vessels and hollow organs)
-involuntary
-lack straie
innervated along full length
one nucleus
shorter fibers - .015 to .5 mm

Question 7

cardiac

Answer 7

-muscle of the heart
-involuntary
-slightly striated
one central nucleus
intercalated discs

Question 8

intercalated discs

Answer 8

connect cardiac muscle fibers to each other
unique dark bands in cardiac muscle fibers
allow heart muscle fibers to be innervated individually