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1 | |
Which of the following is(are) types of muscle? |
| | A) | cardiac |
| | B) | skeletal |
| | C) | smooth |
| | D) | All of these are correct. |
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2 | |
We know that muscles permit us to move, but which of the following is/are also a function(s) of the muscles? |
| | A) | protect internal organs and stabilize joints |
| | B) | maintain constant body temperature |
| | C) | assists movement of lymph in lymphatic vessels |
| | D) | All of these are correct. |
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3 | |
A muscle fiber contains many contractile elements called _____ that run the length of a muscle fiber. |
| | A) | actin filaments |
| | B) | myosin filaments |
| | C) | sarcolemma |
| | D) | myofibrils |
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4 | |
The end of the muscle that is attached to the stationary bone is called the _____. |
| | A) | origin |
| | B) | insertion |
| | C) | fascia |
| | D) | antagonist |
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5 | |
When a group of muscles moves a body part, the muscle that does the most work is called the _____. |
| | A) | antagonist |
| | B) | prime mover |
| | C) | synergist |
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6 | |
The lower arm extends when the _________. |
| | A) | triceps brachii contracts |
| | B) | biceps brachii contracts |
| | C) | upper arm extends |
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7 | |
Skeletal muscles are usually named on the basis of _____ . |
| | A) | shape, size, or action |
| | B) | direction of fibers |
| | C) | number of attachments |
| | D) | all of the above |
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8 | |
What triangle-shaped muscle of the upper body abducts and raises the arm at the shoulder? |
| | A) | Frontalis |
| | B) | Quadriceps femoris group |
| | C) | Deltoid |
| | D) | Gluteus medius |
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9 | |
The _____ muscle closes the jaw. |
| | A) | frontalis |
| | B) | masseter |
| | C) | oblique |
| | D) | biceps |
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10 | |
In a muscle fiber, the plasma membrane is called the _______. |
| | A) | sarcolemma |
| | B) | sarcoplasm |
| | C) | sarcoplasmic reticulum |
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11 | |
The sarcolemma in a muscle fiber forms _______. |
| | A) | S tubules |
| | B) | L tubules |
| | C) | T tubules |
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12 | |
The expanded portions of the sarcoplasmic reticulum store _________. |
| | A) | water |
| | B) | calcium |
| | C) | phosphate |
| | D) | hydrogen ion |
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13 | |
A sarcomere extends between two dark lines called the ________ lines. |
| | A) | Q |
| | B) | Z |
| | C) | T |
| | D) | R |
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14 | |
According to the sliding filament theory, myosin filaments pull actin filaments by means of ___. |
| | A) | cross-bridges |
| | B) | active transport |
| | C) | passive transport |
| | D) | expansion |
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15 | |
Which of the following is a neurotransmitter that triggers muscle contraction? |
| | A) | myosin |
| | B) | tropomyosin |
| | C) | troponin |
| | D) | acetylcholine |
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16 | |
ATP is split into ADP and P by _______ in the myosin head, causing a power stroke. |
| | A) | neurotransmitters |
| | B) | ATPase enzymes |
| | C) | ADP enzymes |
| | D) | actin |
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17 | |
A muscle twitch is divided into what periods? |
| | A) | latent period |
| | B) | contraction period |
| | C) | relaxation period |
| | D) | all of the above |
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18 | |
Muscle tension summates until maximal sustained contraction, called ________, is achieved. |
| | A) | a twitch |
| | B) | fusion |
| | C) | tetanus |
| | D) | fatigue |
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19 | |
A motor neuron and the muscle fibers associated with it form a ___________________. |
| | A) | motor unit |
| | B) | spindle |
| | C) | reflex |
| | D) | complex |
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20 | |
Creatine phosphate can be ______. |
| | A) | used in the reaction: actin + myosin = actomyosin |
| | B) | used to change ADP to ATP |
| | C) | a molecule found in DNA |
| | D) | all of the above |
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21 | |
The end product of fermentation (anaerobic energy production in muscle) is ________. |
| | A) | glucose |
| | B) | oxygen |
| | C) | lactate |
| | D) | water |
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22 | |
When a muscle is not used, it can _____. |
| | A) | hypertrophy |
| | B) | atrophy |
| | C) | both A and B |
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23 | |
An autoimmune disease that is characterized by muscle weakness in the eyelids, face, neck, and extremities, and is caused when antibodies destroy acetylcholine receptors, is _____________. |
| | A) | tendonitis |
| | B) | muscular dystrophy |
| | C) | myasthenia gravis |
| | D) | myalgia |
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