Multiple Choice
What type of neuron carries impulses from all parts of the body to the central nervous system?
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4. Tissues & Histology
Introduction to Nervous Tissue
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How do the DNA and genes in a muscle cell compare to the DNA and genes in a nerve cell?
A
Muscle cells and nerve cells contain the same DNA sequences but express different genes.
B
Muscle cells and nerve cells contain different DNA sequences.
C
Muscle cells have more DNA than nerve cells.
D
Nerve cells have unique genes not found in muscle cells.
Verified step by step guidance1
Understand that all cells in an organism typically contain the same DNA sequences. This is because they originate from the same fertilized egg and undergo mitosis, which replicates the DNA identically in each cell.
Recognize that the differentiation of cells, such as muscle cells and nerve cells, is due to the expression of different genes rather than differences in the DNA sequences themselves.
Learn that gene expression is regulated by various factors, including transcription factors and epigenetic modifications, which determine which genes are turned on or off in a particular cell type.
Consider the role of proteins in cell function. Different genes being expressed lead to the production of different proteins, which in turn give muscle cells and nerve cells their unique characteristics and functions.
Conclude that while muscle cells and nerve cells contain the same DNA sequences, they express different sets of genes, leading to their distinct roles in the body.
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