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Canvas Quiz Chapter 4
Terms in this set (11)
Which is a definition of hypertrophy?
-an increase in muscle fiber size
-a decrease in muscle fiber number
-an increase in muscle fiber number
-a decrease in muscle fiber size
an increase in muscle fiber size
What makes up a motor unit?
-one motor nerve connected to muscle fibers
-one tendon and one muscle fiber
-one motor nerve connected to a tendon
-fast- and slow-twitch muscle fibers
one motor nerve connected to muscle fibers
What is the best classification of muscular contraction that includes muscular force exerted as a muscle shortens?
Which of the following is a good resistance training technique for developing explosive strength?
Which advantage is associated with static exercises?
-They mimic the speed of contraction needed for some sports.
-They build strength but not endurance.
-They require inexpensive equipment.
-They require no equipment.
They require no equipment.
Using the FITT Principle, what determines training intensity for weight training?
-amount of time lifting
-number of sets
-amount of weight lifted
-number of repetitions
amount of weight lifted
For overall fitness, how many different exercises should a weight training program include?
-8 to 10
-2 to 3
-12 to 14
-5 to 6
8 to 10
Which defines an antagonistic muscle?
-a muscle that is a contracting muscle
-a muscle that is a strong, powerful muscle
-a muscle that relaxes as another contracts
-a muscle that is a small, weak muscle
a muscle that relaxes as another contracts
Plyometrics involves moving a weight as rapidly as possible.
Dynamic weight training involves applying force without a change in the length of the working muscles.
1). Name the two major types of muscle fibers and describe key differences between them.
2). Name the energy system that is primarily used with each type of fiber.
3). Give an example of of one activity that is primarily utilized by each fiber type.
1. The two major types of muscle fibers are slow-twitch fibers and fast-twitch fibers. The main differences between the two are that the rate they fatigue, the amount of force they can apply at once, and the way they look. Slow-twitch fibers don't get tired quickly, but they don't contract very quick and aren't as strong powerful. These fibers are also a red muscle fiber. Now fast-twitch fibers contract very quickly and with a lot of force and power, but they fatigue very quickly. Theses are also white muscle fibers. So slow-twitch fibers have greater endurance but less force while fast-twitch fibers have greater force but less endurance.
2. Slow-twitch muscle fibers would use an aerobic energy system which requires the use of oxygen. It breaks down glucose to use it as energy and fuel the body so it can do and sustain a lot of movement and exercise. Fast-twitch muscle fibers ru
3. Slow-twitch muscles would be used for activities that would require a longer use of the muscle for example running a marathon or swimming. These muscles would be able to sustain someone for the whole duration of the marathon. For fast-twitch muscles, activities like powerlifting or sprinting would use these fibers because it's more of a "one and done" fast energy kind of activity.
(5/6 pts "I only see part of the answer for #2.")
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