Which of the following has ATPase activity?
1. Actin 2. Tropomyosin
3. Head of myosin 4. Troponin
The ATPase activity of the myosin head is dependent on:
1. Magnesium ions
2. Manganese ions
3. Calcium ions
4. Ferric ions
Skeletal muscle bundles [fascicles] are held together by a common connective tissue layer called:
1. Perimysium
2. Endomysium
3. Fascia
4. Aponeurosis
The neurotransmitter released at the neuromuscular junction is:
1. Adrenaline
2. Nor-adrenaline
3. Dopamine
4. Acetylcholine
During muscle contraction, the length of all the following gets reduced except:
1. H-Zone
2. A-Band
3. I-Band
4. Sacromere
What is true about the white muscle fibers?
1. Myoglobin content is high
2. They have a large number of mitochondria
3. They depend on anaerobic process for energy
4. They are adapted for slow sustained activities
The human ribs are termed as bicephalic because:
1. | They have two articulations surfaces on their ventral end. |
2. | They have two articulations surfaces on their dorsal end. |
3. | They have two articulations surfaces on their ventral end and two on the dorsal end. |
4. | They have two articulations surfaces on their ventral end and one on the dorsal end. |
The clavicle is articulated with the:
1. Xiphoid process of the sternum
2. Acromion of the scapula
3. Glenoid cavity of the scapula
4. Head of the humerus
Hypocalcemia may lead to:-
1. Kidney stones
2. Cholelithiasis
3. Stronger muscle contractions
4. Tetany
Identify the incorrectly matched pair:
Joint Type
1. Proximal radio-ulnar joint Pivot
2. Joint between the carpals Gliding
3. Joint between metacarpal of Saddle
thumb and phalange
4. Humero-ulnar joint Hinge