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Physiology Wk 6 Quiz
| Question | Answer |
|---|---|
| Attempting to pick up an object too heavy to lift would result in which type of muscle contraction? | Isometric |
| The knee joint is an example of a _____ joint. | hinge |
| In terms of function, which is considered an immovable joint? | Synarthrosis |
| The opposite of dorsiflexion is: | plantar flexion |
| The lactate produced by anaerobic respiration is converted back to glucose in the: | liver |
| Which of the following is not one of the major functions of muscles? | protection |
| The type of movement that occurs when the head is dropped to the shoulder, then to the chest, to the other shoulder, and toward the back is: | circumduction |
| The protein molecule that has heads jutting out for cross-bridging is: | myosin |
| Which of the following statements is incorrect about motor units? | The more muscle fibers stimulated by a motor neuron, the more precise the movements of that muscle can be. |
| Which of the following proteins found in myofilaments contains the cross-bridges? | myosin |
| Which of the following is not a part of the neuromuscular junction? | T-tubules |
| Endurance training is also known as: | aerobic training |
| A gliding joint is an example of a(n) _____ joint | multiaxial |
| Which joint allows for the widest range of movement? | ball and joint |
| Painful muscle contractions or involuntary twitches are called: | cramps |
| Moving a part of the body forward is: | protraction |
| Tilting the foot upward, decreasing the angle between the top of the foot and the front of the leg, is called: | dorsiflexion |
| A contraction in which the tension within the muscle remains the same but the length changes is called a(n) _____ contraction. | isotonic |
| An example of a hinge joint is(are) the: | interphalangeal joints |
| During which phase of the twitch contraction is there a triggering of the release of calcium ions into the sarcoplasm? | latent period |
| Which joint allows for the most movement? | ball and socket |
| Rotator cuff surgery is performed quite commonly on professional baseball players, especially pitchers. Evidently, the throwing motion places enormous stress on the: | shoulder |
| The first event to occur in muscle relaxation is that: | the sarcoplasmic reticulum begins actively pumping calcium back into its sacs. |
| The chief function of the T-tubules is to: | allow for electrical signals to move deeper into the cell. |
| Which of the following is not an end-product of the breakdown of ATP? | an inorganic phase, energy that can be used in muscle contraction, and ADP. (all) |
| The strength of a muscle contraction is influenced by the: | amount of load, initial length of muscle fibers, recruitment of motor units, (all) |
| The substance that attracts oxygen in the myoglobin molecule is: | iron |
| Which of the following statements about cardiac muscle is incorrect? | Cardiac muscle requires nervous stimulation to contract. |
| All of the following are noninflammatory joint disorders except: | juvenile rheumatoid arthritis |
| After it is released from the sarcoplasmic reticulum, the calcium combines with which protein? | Troponin |
| The opposite of eversion is: | none |
| Which of the following terms describes an isometric contraction? | static tension |
| Kicking a football is accomplished by knee: | extension |
| Moving a body part away from the medial plane of the body is called: | abduction |
| Which type of muscle is responsible for peristalsis? | single-unit smooth |
| Which structure functions to temporarily store calcium ions? | Sarcoplasmic reticulum |
| Physiological muscle fatigue may be caused by: | a relative lack of ATP, high levels of lactate, failure of the sodium-potassium pumps. (all) |
| Aerobic respiration: | produces the maximum amount of energy available from each glucose molecule. |
| The purpose of creatine phosphate in muscle contraction is to: | replenish energy supply. |
| Which joint allows for a unique movement called opposition? | saddle |
| Glucose can be stored in the muscle as: | glycogen |
| Which of the following is an incorrect statement regarding heat production? | The body temperature set point is established by the hypothalamus, Shivering will increase body temperature, Body temperature functions on a negative-feedback mechanism. (all) |
| The type of movement possible at a synovial joint depends on the: | shape of the articulating surfaces of the bones. |
| Most body movements are _____ contractions. | isotonic |
| Cross-bridges are also called: | myosin heads |
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