Questions and Answers
Which cells give rise to the nerve cells of the sympathetic ganglia?
What structures do spongioblasts give rise to?
Which type of cells originate in the suprarenal medulla?
Which of the following is a role of melanocytes?
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From where do some bones of the face originate?
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Study Notes
NEUROBLASTS
- Neuroblasts differentiate into nerve cells associated with specific cranial nerves: sensory ganglia of the 5th (trigeminal), 7th (facial), 8th (vestibulocochlear), and 10th (vagus) cranial nerves.
- They also contribute to the formation of nerve cells in the dorsal root ganglia, which are crucial for transmitting sensory information to the spinal cord.
- Neuroblasts give rise to neurons in the sympathetic ganglia, which are involved in the autonomic nervous system's fight-or-flight responses.
- Additionally, they form nerve cells in the parasympathetic ganglia associated with cranial nerves III (oculomotor), VII, IX (glossopharyngeal), and X.
SPONGIOBLASTS
- Spongioblasts are responsible for developing the pia and arachnoid matter, layers of the leptomeninges that protect the central nervous system.
- They also differentiate into Schwann cells, which form the myelin sheath around peripheral nerves, aiding in faster nerve signal transmission.
CHROMAFFIN CELLS
- Chromaffin cells are located in the suprarenal medulla (adrenal medulla) and are essential for the production of catecholamines, such as adrenaline and noradrenaline.
- These cells also give rise to cells found in carotid and aortic bodies, specialized structures involved in monitoring blood oxygen and carbon dioxide levels.
MELANOCYTES
- Melanocytes are specialized pigment cells located in the skin, responsible for producing melanin, which gives color to the skin and protects against ultraviolet radiation.
BRANCHIAL ARCHES
- Certain bones of the face develop from the branchial arches, structures present during embryonic development that contribute to the formation of various skeletal components in the head and neck region.
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Description
Test your knowledge on neuroblasts, spongioblasts, and chromaffin cells. This quiz covers their functions and the types of nerve cells that arise from them, focusing on cranial nerves and meninges. Challenge yourself with multiple-choice questions!
