Which one of the following joints would allow no movement?
1. Ball and socket joint
2. Fibrous joint
3. Cartilaginous joint
4. Synovial joint
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It is much easier for a small animal to run uphill than for a large animal, because
1. It is easier to carry a small body weight
2. Smaller animals have a higher metabolic rate
3. Small animals have a lower O2 requirement
4. The efficiency of muscles in large animals is less than in the small animals
Osteoporosis, an age related disease of skeletal system, may occur due to
1. High concentration of Ca++ and Na+
2. Decrease level of estrogen
3. Accumulation of uric acid leading to inflammation of joints
4. Immune disorder affecting neuromuscular junction leading to fatigue
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Out of ‘X’ pairs of ribs in humans, only ‘Y’ pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation.
1. X = 12, Y = 15 True ribs are attached dorsally to vertebral column and sternum on the two ends
2. X = 24, Y = 7 True ribs are dorsally attached to vertebral column but are free on ventral side
3. X = 24, Y = 12 True ribs are dorsally attached to vertebral column but are free on ventral side
4. X = 12, Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum
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Calcium is important in skeletal muscle contraction because it
1. | Detaches the myosin head from the actin filament |
2. | Activates the myosin ATPase by binding on it |
3. | Binds to troponin to remove the masking of active sites on actin for myosin |
4. | Prevents the formation of bonds between the myosin cross bridges and the actin filament |
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The source of energy that can be directly used by muscle for contraction is:
1. GTP
2. ATP
3. Creatine phosphate
4. Glucose
Match type of synovial joint in Column I with correct example in Column II and select the correct answer from the codes given below:
Column I | Column II | ||
A. | Ball and socket | a. | Gleno-humeral joint |
B. | Gliding | b. | First carpometacarpal joint |
C. | Saddle | c. | Between carpal bones |
D. | Condyloid | d. | Metacarpophalangeal joint |
Codes
A | B | C | D | |
1. | d | c | b | a |
2. | d | b | c | a |
3. | a | c | b | d |
4. | a | b | c | d |
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ATPase activity is found in:
1. | Myosin head | 2. | Myosin tail |
3. | G-Actin | 4. | Troponin |
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The membranous connective tissue closest to the individual muscle fiber in a skeletal muscle is called as:
1. | aponeurosis | 2. | epimysium |
3. | perimysium | 4. | endomysium |
The neurotransmitter released at the neuro-muscular junction is:
1. Epinephrine
2. Acetylcholine
3. Serotonin
4. GABA