Which bones are formed by intramembranous ossification?
Long bones arms and legs
Bones of the pelvic girdle
Vertebrae
Flat bones of the skull
The Correct Answer is D
Intramembranous ossification is a process of bone formation in which bone tissue forms directly within mesenchymal (undifferentiated) connective tissue membranes. This process is responsible for the formation of the flat bones of the skull, including the frontal, parietal, occipital, and temporal bones.
Long bones of the arms and legs, bones of the pelvic girdle, and vertebrae are formed by endochondral ossification, a different process of bone formation in which bone tissue replaces hyaline cartilage.
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Related Questions
Correct Answer is D
Explanation
Intramembranous ossification is a process of bone formation in which bone tissue forms directly within mesenchymal (undifferentiated) connective tissue membranes. This process is responsible for the formation of the flat bones of the skull, including the frontal, parietal, occipital, and temporal bones.
Long bones of the arms and legs, bones of the pelvic girdle, and vertebrae are formed by endochondral ossification, a different process of bone formation in which bone tissue replaces hyaline cartilage.
Correct Answer is A
Explanation
Lysosomes contribute to phagocytosis in white blood cells by fusing with the phagosome, which is the membrane-bound vesicle that engulfs the foreign particle or pathogen during phagocytosis. The lysosomes contain hydrolytic enzymes that can break down the engulfed material, thereby helping to destroy the invading pathogen. Additionally, lysosomes can also release reactive oxygen species and other antimicrobial molecules that further aid in the destruction of the pathogen.
Vacuoles, endoplasmic reticulum, and Golgi apparatus do not directly contribute to phagocytosis in white blood cells. Vacuoles are used for storage in cells, while the endoplasmic reticulum and Golgi apparatus are involved in protein synthesis and processing.
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