Free Personal Trainer Certification Questions
This is 2nd part blog on Free Personal Trainer Certification Questions. In this part you will see some more science questions related finding answers. These questions can be practice for other science Practice Exams too.
Free Personal Trainer Certification Sample Practice Questions: Q 6-15
Q 6
What are the three types of muscle tissue?
A. Cardiac, smooth, rough
B. Cardiac, smooth, skeletal
C. Smooth, rough, skeletal
D. Cardiac, type I, type II
Q 7
Which of the following facts is not true about skeletal muscles?
A. They account for 36-45% of total body weight.
B. Skeletal muscle is the most plentiful tissue type in the body.
C. They can be stretched to up to 250% of their resting length.
D. They usually operate together with other muscles in functional groups.
Q 8
Which of the three types of muscle action has a constant speed of shortening and lengthening?
A. Concentric
B. Eccentric
C. Isometric
D. Antagonistic
Q 9
What is the correct order of structures of a muscle from smallest to largest?
A. Muscle fiber, endomysium, fascicles, perimysium, epimysium
B. Muscle fiber, epimysium, fascicles, perimysium, endomysium
C. Muscle fiber, endomysium, perimysium, fascicles, epimysium
D. Muscle fiber, epimysium, endomysium, fascicles, perimysium
Q 10
Which muscular structure surrounds the actual muscle fiber and is responsible for depolarization of the surface of the fiber and protection and insulation of the fiber from others around it?
A. Satellite cells
B. Sarcoplasm
C. Fascia
D. Sarcolemma
Q 11
What part within the muscle fiber stores glycogen and myoglobin and is made up of lipids, enzymes and various types of cellular organelles?
A. Sarcolemma
B. Sarcoplasm
C. Transverse tubules
D. Myofibrils
Q 12
. Within the myofibril, which of the following is the lighter band that contains only actin?
A. H zone
B. M line
C. A band
D. I band
Q 13
Which of the following correctly describes what happens within the muscle fiber during contraction?
A. Myosin cross-bridges bind, actin slides over myosin, Z lines are pulled together
B. Z lines are pulled together, myosin slides over actin, myosin cross-bridges bind
C. Myofilaments shorten in length, sarcomere lengthens, Z lines are pulled together
D. Myosin filaments shorten, actin slides over myosin, A band shortens
Q 14
What is the function of calcium in the muscle stimulation process?
A. Provides the action potential
B. Binds with troponin to open up binding sites
C. Binds to actin filaments’ binding sites
D. Conducts the electrical impulse along the myofibril
Q 15
Which of the following does not correctly describe fast-twitch muscles fibers?
A. They have a quick rate of calcium ion releases
B. They use blood glucose and muscle glycogen for energy.
C. They are used during aerobic exercises.
D. They generate fast, powerful muscle actions.
Answers-Free Personal Trainer Certification Questions 6-15
6 Answer: B - The three types of muscle tissue are cardiac, smooth and skeletal. Cardiac and smooth are involuntary muscles, which perform basic bodily functions, whereas skeletal muscles move by conscious stimulation.
7 Answer: C - All these facts are true about skeletal muscles except for C. Skeletal muscles can only be stretched up to 150% of their resting length, not up to 250%. There are over 600 different skeletal muscles in the body and they work in pairs and groups to perform movement.
8 Answer: C - Of the three types of muscle action, the one that has a speed of shortening and lengthening that is constant is isometric muscle action. In this type of motion, the muscle is able to resist the force exerted against it, but it cannot overcome that force; therefore there is no discernible movement, but rather there is stability. This action does not cause joint movement.
9 Answer: A - The correct order of structures of a muscle from smallest to largest is: muscle fiber, endomysium, fascicles, perimysium, epimysium.
10 Answer: D - The sarcolemma is responsible for depolarization of the surface of the fiber and protection and insulation of the fiber from others around it. The sarcolemma is a thin membrane that connects with the endomysium and contains structures that are important for internal functions and growth.
11 Answer: B - The sarcoplasm stores glycogen and myoglobin and is made up of lipids, enzymes and cellular organelles. It is comparable to the cytoplasm in other cells, but has more specific functions. The stored glycogen is a source of energy, and the myoglobin is used for oxygen binding.
12 Answer: D - The lighter band containing only actin within the myofibril is called the I band. The I band region becomes smaller during concentric muscle actions.
13 Answer: A - During muscle contraction, the myosin cross-bridges bind, actin slides over myosin and Z lines are pulled together. Myofilaments do not change in length, but the sarcomere does.
14 Answer: B - During muscle stimulation, calcium binds with troponin, which subsequently shifts the tropomyosin off the binding sites, freeing them up for the myosin cross-bridges to attach them.
15 Answer: C - All these statements are true of fast-twitch muscles except that they are used for aerobic exercises; rather, they are used for anaerobic ones such as spiking a volleyball. Their speed of shortening and force development is much faster than the slow-twitch muscles.
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