KINES: Muscle Structure and Function

Question 1

compare skeletal, cardia and smooth muscles

Answer 1

skeletal
- strong, quick, discontinous voluntary
- striated and cylyndrical
- multi nucleated

cardiac
- strong, quick continous involuntary
- striated and branched
- uninucleated

smooth
- weak, slow involuntary
- non-stri and branched
- uninucleated

Question 2

what are the functions of skeletal muscles

Answer 2

produce movement
maintain posture
stabilise joints
support and protects organs
assist in venous return; LE
thermogenesis

Question 3

define irritability

Answer 3

ability to respond to stimulus

Question 4

define contractility

Answer 4

ability to generate tension and shorten

Question 5

define extensibility

Answer 5

to lengthen or stretch

Question 6

define elasticity

Answer 6

to return to its original length; passive force of muscle

Question 7

compare parallel and series elastic components

Answer 7

parallel: muscle membranes

series: in tendons and aponeurosis
- string to store elastic energy during stretch > released during contraction
- stability during isometric