Ch. 2 - Intro and Muscle nomenclature

Question 1

What is skeletal muscle responsible for?

Answer 1

• movement of the body and al its joint
• dynamic stability, protection, posture and support, and the majority of body heat

Question 2

How many skeletal muscles are there? How many pairs?

Answer 2

• over 600, which make up 40-50% of body weight
• 215 pairs

Question 3

Aggregate muscle grouping

Answer 3

muscles working together in groups rather than independently to achieve given joint motions

Question 4

Muscles are named by characteristics like:

Answer 4

• visual appearance: shape (deltoid/rhomboid), size (gluteus maximum), # of divisions (triceps brachia), direction of fibers (external oblique)
• anatomical location: location (rectus femoris), points of attachment (coracobrachialis)
• function: action (supinator)
• also named by group, like the quadriceps