Q. No.Glenoid cavity articulates
1.
clavicle with acromion
2.
scapula with acromion
3.
clavicle with scapula
4.
humerus with scapula
During muscular contraction, which of the following events occur?
(a) 'H' zone disappears
(b) 'A' band widens
(c) 'I' band reduces in width
(d) Myosin hydrolyzes ATP, releasing the ADP and Pi
(e) Z-lines attached to actins are pulled inwards
Choose the correct answer from the options given below.
1. (b), (c), (d), (e) only
2. (b), (d), (e), (a) only
3. (a), (c), (d), (e) only
4. (a), (b), (c), (d) only
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Match the following columns and select the correct option.
| Column-I | Column-II | ||
| (a) | Floating Ribs | (i) | Located between second and seventh ribs |
| (b) | Acromion | (ii) | Head of the humerus |
| (c) | Scapula | (iii) | Clavicle |
| (d) | Glenoid cavity | (iv) | Do not connect with the sternum |
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iii) | (ii) | (iv) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (ii) | (iv) | (i) | (iii) |
Select the correct option.
1. There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs.
2. 8th, 9th and 10th pairs of ribs articulate directly with the sternum.
3. 11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage.
4. Each rid is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.
Identify the incorrect statement:
1. All motor neurons innervating a single muscle fiber constitute a motor unit.
2. Cross bridges occur when myosin heads combine with the binding sites on actin.
3. The neurotransmitter that stimulates skeletal muscle is acetylcholine.
4. The area of the sarcomere that contains only thin and elastic filaments is the I band.
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The direct source of energy for muscle contraction is:
1. ATP
2. Creatine phosphokinase
3. Oxidative phosphorylation of glucose
4. Reduction of pyruvate to lactate
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The neurotransmitter released by the motor neurons at the neuromuscular junction is:
| 1. | Acetylcholine | 2. | Noradrenaline |
| 3. | GABA | 4. | Adrenaline |
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Tetany is caused by:
1. low levels of Ca++ in body fluids
2. high levels of Ca++ in body fluids
3. low levels of K+ in body fluids
4. high levels of K+ in body fluids
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An example of a fibrous joint ‘gomphosis’ in the human body is:
| 1. | humerus-ulna | 2. | femur-innominate |
| 3. | tooth-alveolus | 4. | mandible-temporal |
Abnormal curvature of the vertebral column where the alignment shows a lateral deviation is called as:
| 1. | kyphosis | 2. | lordosis |
| 3. | scoliosis | 4. | ankylosis |
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