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
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
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
The globular head of the myosin filament has active site/s for binding to:
I. ATP
II. the binding site for actin filament
III. Calcium
1. Only I
2. Only I and II
3. Only II and III
4. I, II, and III
The combination of a neuron and the muscle fiber it associates with is called a/an.
1. fascicle
2. motor end plate
3. motor unit
4. myoneural junction
In the given diagram of the lower limb bones of a human, a sesamoid bone is depicted by the letter:
1. A
2. B
3. C
4. D
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