Consider the following statements:
I. A motor neuron along with the muscle fibres connected to it constitute a motor unit
II. The neurotransmitter released at the neuro-muscular junction is Acetylcholine.
III. Myosin head has ATPase activity.
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II, and III
Consider the following statements:
I. | Myasthenia gravis is an autoimmune disorder affecting the neuromuscular junction |
II. | Muscular dystrophy is a progressive degeneration of skeletal muscles mostly due to a genetic disorder |
III. | Tetany is rapid spasms in muscles due to high Ca++ in body fluid. |
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
Consider the following statements:
I. Proximal radioulnar joint is a type of ellipsoidal joint.
II. The first carpo-metacarpal joint is a saddle joint.
III. Gleno-humeral joint is a ball and socket joint.
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II, and III
Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I |
Column II |
I. Smooth muscle II. Skeletal muscle III. Cardiac muscle |
1. Striated, voluntary 2. Non-Striated, involuntary 3. Striated, Involuntary |
Codes:
I II III
1. 1 2 3
2. 3 1 2
3. 2 1 3
4. 1 3 2
Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I |
Column II |
I. Acetabulum II. Glenoid Cavity III. Vertebrosternal ribs IV. Vertebrochondral ribs |
1. Pectoral girdle 2. Pelvic girdle 3. 7 pairs 4. 3 pairs |
Codes
I II III IV
1. 1 2 3 4
2. 2 1 4 3
3. 2 1 3 4
4. 1 2 4 3
Match each item in Column I with one item in Column II and choose your answer from the codes given below:
Column I | Column II | ||
I. | Influx of sodium | 1. | Original establishment of RMP |
II. | Efflux of potassium | 2. | Repolarization |
III. | Na+/K+ pump | 3. | Depolarization |
IV. | Ca++ | 4. | Plateau in cardiac muscles |
Codes :
I | II | III | IV | |
1. | 3 | 2 | 4 | 1 |
2. | 2 | 1 | 4 | 3 |
3. | 2 | 1 | 3 | 4 |
4. | 3 | 2 | 1 | 4 |
Which of the following joints would allow no movement?
(1) Fibrous joint
(2) Cartilaginous joint
(3) Synovial joint
(4) Ball and socket joint
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 = 7 True ribs are attached, dorsally to
vertebral column and ventrally to
the sternum.
(2) X = 12, Y = 5 True ribs are attached dorsally to
vertebral column and sternum on
the two ends.
(3) X = 24, Y = 7 True ribs are dorsally attached to
vertebral column, but are free on
ventral side.
(4) X = 24, Y = 12 True ribs are dorsally attached to
vertebral column, but are free on
ventral side.
The pivot joint between atlas and axis is a type of
(1) fibrous joint
(2) cartilaginous joint
(3) synovial joint
(4) saddle joint
Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
(1) Calcium
(2) Magnesium
(3) Sodium
(4) Potassium.