The type of contraction represented by a single stimulus/contraction/relaxation
ID: 85967 • Letter: T
Question
The type of contraction represented by a single stimulus/contraction/relaxation sequence is a A. Twitch B. Incomplete tetanus C. Complete tetanus D. Summation E. Incomplete summation A Joint formed by the fusion of two bones is a(n) A. Gomphosis B. Synchondrosis C. Synostosis D. Symphysis E. Diarthrosis Which of the following is a characteristic of the male pelvis? A. Triangular obturator foramen B. Coccyx points anteriorly C. Sacrum broad and short D. Bone markings not very prominent E. Ischial spine points posteriorly When seated, the weight of the body is borne by the A. ischial tuberosities B. Posterior inferior iliac spines C. Iliac crests D. Obturator foramina E. Inferior rami of the pubis The olecranon process would be found on the A. Humerus B. Radius C. Ulna D. femur E. Tibia The secondary spinal curves A. Help position the body weight over the legs. B. Accomodate the thoracic and abdominopelvic viscera c. Include the thoracic curvature D. Both A and B only E. All of the aboveExplanation / Answer
22. Twitch is the only contraction here that is represented by a single stimulus. The rest of the options are all defined by two or more stimuli. Thus, the answer is A: Twitch
23. The answer is C: Synostosis. This is a type of joint formed by the fusion of two bones, caused by the growth of bony substance. The others involve cartilage and ligament in joint formation, which cannot be termed as fusion.
24. Triangular obturator foramen is a characteristic of the female pelvis. The ischial spine points posteriorly and the sacrum is broad and short in all humans. Also, one cannot differentiate between a male and a female pelvis based on bone markings alone.
The answer here is B: Coccyx points anteriorly.
25. The ischial tuberosities support the weight when in a seated position. They are also known as 'sitting bones'. Their peculiar posteriorly 'swollen' shape on the superior ramus allows them to support weight when sitting.
26. The answer is C: Ulna. The olecranon process is a part of the end of the ulna, near the elbow joint, which can be felt as the pointed structure of the elbow. The rest of the options can be eliminated: Femur and Tibia have nothing to do with the elbow, as they are bones from the legs. Also, humerus and radius are inovlved in the elbow joint, but do not contribute to the olecranon process.
27. The secondary spinal curves help maintaining flexibility, balance and in weight distribution. Thoracic curvature is a primary spinal curvature. Thus the only option linked to secondary spinal curves is A: Help position the body weight over the legs. The thoracic cuve accomodates the thoracic viscera, and hence can be eliminated as an option.
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