Q. No.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.
The critical event for the contraction of striated muscles would be that calcium ions:
1. are released from troponin C
2. bind to tropomyosin
3. bind to troponin
4. are taken up by the sarcoplasmic reticulum
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Smooth muscle is fundamentally different from skeletal muscle and cardiac muscle. |
| Reason (R): | Smooth muscle is an involuntary non-striated muscle. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
The neurotransmitter released by the motor neurons at the neuromuscular junction is:
| 1. | Acetylcholine | 2. | Noradrenaline |
| 3. | GABA | 4. | Adrenaline |
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Cells of human body exhibit three main types of movements. Cytoskeleton elements called microfilaments play an important role in:
A. Amoeboid movements
B. Ciliary movements
C. Muscular movements
| 1. | Only A | 2. | Only A and B |
| 3. | Only A and C | 4. | A, B and C |
Abnormal curvature of the vertebral column where the alignment shows a lateral deviation is called as:
| 1. | kyphosis | 2. | lordosis |
| 3. | scoliosis | 4. | ankylosis |
Accumulation of uric acid in joints will lead to:
| 1. | Rheumatoid arthritis | 2. | Osteoarthritis |
| 3. | Osteomalacia | 4. | Gouty arthritis |
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Skeletal muscles appear striated due to presence of two characteristic proteins in alternating dark and light bands. Which of the following is a correct match of the protein with its light refractive property and colour?
| Protein | Colour | Property | |
| 1. | Myosin | Light | Anisotropic |
| 2. | Actin | Dark | Anisotropic |
| 3. | Myosin | Dark | Isotropic |
| 4. | Actin | Light | Isotropic |
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The phosphogen that helps the regeneration of ATP from ADP during muscle contraction in vertebrates is
| 1. | ADP | 2. | Inosital phosphate |
| 3. | Arginine phosphate | 4. | Creatine phosphate |
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