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Jessierene Overstree
Human Physiology Study Stack 1 (Week 1-6)
| Question | Answer |
|---|---|
| The minimal level of stimulation required to cause a fiber to contract is called the | threshold stimulus. |
| The shoulder joint is an example of a _____ joint. | Multiaxial, freely moveable, and ball & socket |
| The four kinds of protein that make up myofilaments are myosin, actin, | tropomyosin, and troponin |
| Three phases of the twitch contraction are the | latent period, contraction phase, and relaxation phase |
| Synarthrotic joints are | immovable |
| According to the sliding filament theory | actin moves past myosin |
| Exercise may cause an increase in muscle size called | hypertropy |
| Which structure allows the electrical signals to travel along the sarcolemma and move deeper into the cell? | transverse tubule |
| Joints joined by fibrocartilage are called | symphyses |
| Repeated stimulation of muscle in time lessens its excitability and contractibility and may result in | fatigue |
| Which of the following is an example of a uniaxial joint? | elbow joint |
| The contractile unit of a muscle cell is the | sarcomere |
| _____ occurs when the foot is tilted upward, thus decreasing the angle between the top of the foot and the front of the leg. | dorsiflexion |
| A contraction in which muscle length remains the same but muscle tension increases is called an | isometric contraction. |
| The muscle’s ability to stretch or extend and to return to its resting length is called | extensibility |
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