Final answer:
The concept of 'Graded muscle as F- (3-)' refers to graded muscle responses in muscle physiology, emphasizing the strength of muscle contractions and explaining the three muscle fiber types: slow oxidative, fast oxidative, and fast glycolytic, which vary in contraction speed and ATP production methods.
Step-by-step explanation:
Graded Muscle Responses and Muscle Fiber Types
The phrase ‘Graded muscle as F- (3-)’ likely refers to a graded muscle response, which is a concept in muscle physiology. Graded muscle responses are modifications of contraction strength in muscles. Muscle fibers can be classified based on how fast they contract and how they produce ATP. There are three main types of muscle fibers: slow oxidative (SO), fast oxidative (FO), and fast glycolytic (FG). Slow oxidative fibers contract slowly using aerobic respiration while fast oxidative fibers contract quickly and use both aerobic and anaerobic respiration, making them quicker to fatigue compared to SO fibers. Fast glycolytic fibers, on the other hand, contract quickly using anaerobic glycolysis and fatigue the fastest.
A muscle that has a pattern of fascicles running along its long axis, according to the provided context on fascicle arrangements, describes a parallel arrangement. This structure is common in muscles that contract with a great range of motion but not a large amount of force.