Question 55 (1 point) While flexing the forearm at the elbow joint, the: Questio

Question

Question 55 (1 point)

While flexing the forearm at the elbow joint, the:

Question 55 options:

Deltoid acts as a synergist.

Deltoid acts as an antagonist.

Triceps brachii acts as a synergist.

Triceps brachii acts as an antagonist.

Biceps brachii acts as an antagonist.

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Question 56 (1 point)

Cavities in bone tissue where osteocytes are found are called:

Question 56 options:

Central Canals

Lamellae

Lacunae

Trabecular

Volkmann's Canals

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Question 57 (1 point)

The canal that runs through the core of each osteon contains:

Question 57 options:

Cartilage

Osteoblasts and Osteoclasts

Red Marrow and Sharpey's Fibers

Nerve Fibers and Blood Vessels

Yellow Marrow

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Question 58 (1 point)

The most important minerals stored in bone include:

Question 58 options:

Phosphorus and Sodium

Sodium and Potassium

Calcium and Potassium

Calcium and Phosphorus

Iron and Calcium

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Question 59 (1 point)

When the levels of calcium in the blood drop below normal:

Question 59 options:

Parathyroid hormone secretion increases.

Parathyroid hormone secretion decreases.

Osteoclast activity increases.

Both A and C.

Both B and C.

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Question 60 (1 point)

The formation of blood cells occurs within the yellow marrow of certain bones.

Question 60 options:

TRUE

FALSE

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Deltoid acts as a synergist.

Deltoid acts as an antagonist.

Triceps brachii acts as a synergist.

Triceps brachii acts as an antagonist.

Biceps brachii acts as an antagonist.

Explanation / Answer

55. Option 4th is correct. During flexing of the forearm, the triceps brachii act as antagonist muscle which resist the movement of the forearm up towards the shoulder.

56. Option 3rd is correct. The calcified matrix of bone contain a small chamber called lacunae where osteocytes are found.

57. Option 4th is correct. The canal that runs through the core of each osteon are known as Haversian canal that allow blood vessels and nerves to travel through them.

58. Option 4th is correct. Calcium and phosphorus are the most important mineral in the bones. Almost 99 percent of calcium and 85 percent of the phosphorus in body found in the bone.

59. Option first is correct. Parathyryoid hormone secretion increases which triggers osteoclst. Activation of osteoclasts enhance the resorption process (release of calcium from bone). Parathyroid hormone also activates vitamin D which enhances the absorption of Ca from intestine.

60. False, Formation of most of the blood cells occurs in red marrow. Only few white blood cells are formed in yellow marrow.

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