Question

C. SHORT ANSWER TYPE 1. What is the difference between a true rib and a floating rib? 2. Do the muscles pull the structures, or push them? Explain briefly. 3. Just as the humerus corresponds to femur, what bones correspond to tarsals, metacarpals, ulna and radius respectively ? 4. What are antagonistic muscles ? Give one example. 5. Some people in old age complain of stiff joints. What do you think could be a possible reason for it?


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Answer 1

Answer:

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Explanation:

1) Difference between a true rib and a floating

rib is that:

A true rib is attached in front to the sternum with the help of a hyaline cartilage, the first 7 pairs of ribs are true ribs.

The last two, 11th and 12th pairs of ribs, are not

attached to the sternum and are, therefore, known as floating ribs.

2) Both biceps and triceps pull the structures.

3) Carpals correspond to tarsals. metatarsals correspond to metacarpals. fibula corresponds to ulna. tibia corresponds to radius.

4) Muscles which work opposite to each other, are known as antagonistic muscles. EXAMPLE: Biceps and Triceps.