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A radioactive marker was applied to the mesoderm of a mammalian embryo. Which tissues or organs would have this marker in the adult?
- a)Spine and brain
- b)Skin and intestines
- c)Bones and muscles
- d)Muscles and skin
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A radioactive marker was applied to the mesoderm of a mammalian embryo...
The mesoderm is one of the three primary germ layers formed during early embryonic development. It gives rise to various tissues and organs in the adult body, including bones and muscles.
The mesoderm differentiates into mesenchyme, which further develops into different types of connective tissues, including bone tissue. Bones are formed through a process called ossification, where mesenchymal cells differentiate into osteoblasts, which produce the extracellular matrix of bone.
Additionally, the mesoderm also gives rise to muscle tissue. Myoblasts, derived from the mesoderm, differentiate into skeletal muscle, smooth muscle, and cardiac muscle cells.
Therefore, if a radioactive marker is applied to the mesoderm of a mammalian embryo, the tissues or organs that would have this marker in the adult are bones and muscles.
Most Upvoted Answer
A radioactive marker was applied to the mesoderm of a mammalian embryo...
Answer:
The mesoderm is one of the three primary germ layers in the early development of a mammalian embryo. It gives rise to various tissues and organs in the adult body. When a radioactive marker is applied to the mesoderm, it indicates that the tissues or organs derived from this germ layer will retain the marker in the adult stage.
Explanation:
The correct answer to this question is option 'C', which states that the bones and muscles would have the radioactive marker in the adult. This is because the mesoderm gives rise to these specific tissues.
Reasoning:
The mesoderm is responsible for the development of various structures in the adult body, including:
1. Bones: The mesoderm gives rise to the skeletal system, including bones. The marker applied to the mesoderm would be retained in the bones throughout development.
2. Muscles: The mesoderm also gives rise to the muscular system. This includes both skeletal muscles (attached to bones) and smooth muscles (found in organs). The radioactive marker would be present in the muscles derived from the mesoderm.
Other options can be ruled out based on the known embryonic origin of the tissues or organs mentioned:
a) Spine and brain: The spine and brain are derived from the ectoderm, not the mesoderm. Therefore, they would not have the radioactive marker applied to the mesoderm.
b) Skin and intestines: The skin is derived from the ectoderm, while the intestines are derived from the endoderm. Neither of these tissues originates from the mesoderm, so they would not have the radioactive marker.
d) Muscles and skin: The skin is derived from the ectoderm, not the mesoderm. Therefore, only the muscles mentioned in this option would have the radioactive marker, not the skin.
In conclusion, the correct answer is option 'C' because the mesoderm gives rise to bones and muscles, which would retain the radioactive marker in the adult stage.
The mesoderm is one of the three primary germ layers in the early development of a mammalian embryo. It gives rise to various tissues and organs in the adult body. When a radioactive marker is applied to the mesoderm, it indicates that the tissues or organs derived from this germ layer will retain the marker in the adult stage.
Explanation:
The correct answer to this question is option 'C', which states that the bones and muscles would have the radioactive marker in the adult. This is because the mesoderm gives rise to these specific tissues.
Reasoning:
The mesoderm is responsible for the development of various structures in the adult body, including:
1. Bones: The mesoderm gives rise to the skeletal system, including bones. The marker applied to the mesoderm would be retained in the bones throughout development.
2. Muscles: The mesoderm also gives rise to the muscular system. This includes both skeletal muscles (attached to bones) and smooth muscles (found in organs). The radioactive marker would be present in the muscles derived from the mesoderm.
Other options can be ruled out based on the known embryonic origin of the tissues or organs mentioned:
a) Spine and brain: The spine and brain are derived from the ectoderm, not the mesoderm. Therefore, they would not have the radioactive marker applied to the mesoderm.
b) Skin and intestines: The skin is derived from the ectoderm, while the intestines are derived from the endoderm. Neither of these tissues originates from the mesoderm, so they would not have the radioactive marker.
d) Muscles and skin: The skin is derived from the ectoderm, not the mesoderm. Therefore, only the muscles mentioned in this option would have the radioactive marker, not the skin.
In conclusion, the correct answer is option 'C' because the mesoderm gives rise to bones and muscles, which would retain the radioactive marker in the adult stage.
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A radioactive marker was applied to the mesoderm of a mammalian embryo. Which tissues or organs would have this marker in the adult?a)Spine and brainb)Skin and intestinesc)Bones and musclesd)Muscles and skinCorrect answer is option 'C'. Can you explain this answer? for MCAT 2025 is part of MCAT preparation. The Question and answers have been prepared according to the MCAT exam syllabus. Information about A radioactive marker was applied to the mesoderm of a mammalian embryo. Which tissues or organs would have this marker in the adult?a)Spine and brainb)Skin and intestinesc)Bones and musclesd)Muscles and skinCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for MCAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A radioactive marker was applied to the mesoderm of a mammalian embryo. Which tissues or organs would have this marker in the adult?a)Spine and brainb)Skin and intestinesc)Bones and musclesd)Muscles and skinCorrect answer is option 'C'. Can you explain this answer?.
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