Question

cell differentiation
below is a picture of a blood cell and a neuron (nerve cell).
neuron
red blood cell

1. give an example of how a cells structure relates to its function
2. embryonic stem cells are unspecialized. explain what this means.
3. how do cells become specialized

Explanation:

1. Neuron: The neuron has long extensions (axons and dendrites). The dendrites receive signals from other neurons, and the axon transmits electrical impulses over long distances. This structure is ideal for its function of transmitting nerve signals throughout the body. Red Blood Cell: It is biconcave and lacks a nucleus. The biconcave shape increases the surface - area - to - volume ratio for efficient gas exchange (absorbing oxygen and releasing carbon dioxide), and the lack of a nucleus makes more space for hemoglobin (the protein that carries oxygen).
2. Embryonic stem cells are unspecialized in the sense that they have not yet committed to a particular cell lineage. They have the potential to differentiate into any type of cell in the body (pluripotent). They do not have a specific structure or function like a fully - differentiated cell (such as a neuron or red blood cell). They can divide and give rise to more stem cells or start the process of differentiation into specialized cells.
3. Cells become specialized through a process called cell differentiation. During development, signals (such as chemical signals from surrounding cells or the extracellular environment) cause changes in gene expression. Certain genes are turned on or off. For example, in a cell that will become a neuron, genes related to neuron - specific proteins (such as neurotransmitter receptors and ion channels) are activated, while genes for other cell - type - specific functions (like hemoglobin production in red blood cells) are repressed. This differential gene expression leads to the development of a cell's specific structure and function.

Answer:

1. Neuron: Long extensions (axons and dendrites) for signal transmission. Red Blood Cell: Biconcave shape (for gas exchange) and no nucleus (more space for hemoglobin).
2. Embryonic stem cells have no specific structure/function and can become any body cell (pluripotent).
3. Through cell differentiation (signals cause differential gene expression).