Q. No.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
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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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
Skeletal muscles are:
| 1. | Striated, Multinucleate and Voluntary |
| 2. | Non-Striated, Multinucleate and Voluntary |
| 3. | Striated, Multinucleate and Involuntary |
| 4. | Non-Striated, Uni-nucleate and Voluntary |
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The bone in human body that does not articulate with any other bone would be:
1. hyoid
2. manubrium
3. patella
4. phalange
The vertebral column originally develops as a series of ______ vertebrae, but this number is eventually reduced to _________ vertebrae.
| 1. | 33, 26 | 2. | 31, 24 |
| 3. | 30, 26 | 4. | 33, 21 |
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