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Week 6 Physiology
| Question | Answer |
|---|---|
| Synovial joints are | Freely movable |
| Repeated stimulation of muscle in time lessens its excitability and contractibility and may result in | Fatigue |
| Muscle tone is maintained by | Negative feedback mechanisms |
| The shoulder joint is an example of a ______ joint | Multiaxial Freely movable Ball and socket |
| Anaerobic respiration Results in the formation of an incompletely metabolized molecule called | Lactate |
| The contractile unit of a muscle cell is the | Sarcomere |
| Some synovial joints contain a closed pillow like structure called a | Bursa |
| A contraction in which muscle length remains the same but muscle tension increases is called an | Isometric contraction |
| Which structure allows the electrical signals to travel along the sarcolemma and move deeper into the cell | Transverse tubule |
| Synarthrotic joints are | Immovable |
| Example of the structures that characterized synovial joints | Ligaments Articular cartilage Joint capsule |
| The energy required for muscular contraction is obtained by hydrolysis of | ATP |
| The 4 kinds of protein that make up myofilaments are myosin, actin, | Tropomyosin and troponin |
| Examples of functions of the muscles | Posture Heat production Movement |
| Which subtype of fibrous joints is found only in the skull | Suture |
| Joints joined by fibrocartilage are called | Symphyses |
| According to the sliding filament theory | Actin moves past myosin |
| The more muscle fibers contracting at the same time, the stronger the contraction of the entire muscle l. The number of muscle fibers contracting depends on how many motor units are | Recruited |
| Which is an example of a unaxial joint | Elbow joint |
| Which type of movement occurs between the carpal and tarsal bones and between the articular fevers of adjoining spinal vertebrae | Gliding |
| 3 phrases of the twitch contraction are the | Latent period Contraction phase Relaxation phase |
| The largest and most commonly injured joint in the body is the ______ joint | Knee |
| If a structural classification is used, joints are named according to the type of ______ tissue that joins the bones together | Connective |
| ______ occurs when the foot is tilted upward, thus decreasing the angle between the top of the foot and the front of the leg | Dorsiflexion |
| The minimal level of stimulation required to cause a fiber to contract is called the | Threshold stimulus |
| The structure of the knee joint permits movements of | Flexion and extension |
| The joint present during the growth years between the epiphyses of a long bone and its diaphysis is the | Synchrondrosis |
| The joints between the articulating surfaces of the vertebral processes are classified as what type of joint | Gliding |
| Exercise may cause an increase in muscle size called | Hypertrophy |
| The muscles ability to stretch or extend and to return to its resting length is called | Extensibility |
Created by:
Hydecar