Assertion (A): | Shortening of myofilaments leads to the shortening of the muscle. |
Reason (R): | Only the actin myofilaments shorten while the length of the myosin myofilaments remains the same during the muscle shortening. |
In the light of the above statements choose the correct answer from the options given below:
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): | Hypocalcemia is the primary cause of tetany. |
Reason (R): | Hypocalcemia increases neuronal excitability |
In the light of the above statements choose the correct answer from the options given below:
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Assertion (A): | Slow twitch fibers can sustain action for a long period of time without fatigue. |
Reason (R): | They can respire anaerobically by using a large store of glycogen and high concentration of glycolytic enzymes. |
In the light of the above statements choose the correct answer from the options given below:
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Pain and inflammation that occur when too much uric acid crystallizes and deposits in the joints are known as:
1. | gout | 2. | osteoarthritis |
3. | osteoporosis | 4. | rheumatoid arthritis |
The first carpometacarpal joint at the base of the thumb is a:
1. | ellipsoidal joint | 2. | pivot joint |
3. | saddle joint | 4. | gliding joint |
The fibrous joint between skull bones is called as:
1. | gomphoses | 2. | syndesmoses |
3. | symphysis | 4. | sutures |
Classification of joints is done on the basis of:
I: | the connective tissue that binds the bones together |
II: | the degree of motion at each joint |
III: | the number of bones that articulate with each other |
IV: | the embryonic tissue that formed the joint |
1. | I, II and III | 2. | II and III |
3. | I, II, III and IV | 4. | I and II |
Cross bridge formation during muscle contraction involves:
1. | troponin and actin | 2. | tropomyosin and myosin |
3. | myosin and troponin | 4. | myosin and actin |
What is number of bones in a human adult?
1. | 150 | 2. | 300 |
3. | 250 | 4. | 206 |
What happens during the contraction of a skeletal muscle fiber?
1. | The myosin filaments stay the same size but the actin filaments shorten |
2. | The sarcomeres shorten |
3. | The actin filaments stay the same size but the myosin filaments shorten |
4. | Both actin and myosin filaments shorten |