NEET Practice Questions - Zoology - Locomotion and Movement

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  • Chapter:

    Locomotion and Movement

The human skull has 22 bones with ..................cranial bones and ............................ facial bones

1. 10,12                            2. 14,8

3. 12,10                            4. 8,14

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 neuro-muscular 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 large number of mitochondria

3. They depend on anaerobic process for energy

4. They are adapted for slow sustained activities

Which of the following is not a cranial bone?

1. Zygomatic

2. Sphenoid

3. Ethmoid

4. Parietal

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 dorsal end

4. They have two articulations surfaces on their ventral end and one on dorsal end

The clavicle 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