THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Endoplasmic Reticulum
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Golgi Bodies
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Nucleus
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Mitochondrion
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Detailed explanation-1: -Second messengers are typically present at low concentrations in resting cells and can be rapidly produced or released when cells are stimulated.
Detailed explanation-2: -Second messengers are molecules that relay signals received at receptors on the cell surface-such as the arrival of protein hormones, growth factors, etc.-to target molecules in the cytosol and/or nucleus.
Detailed explanation-3: -The other messenger is inositol trisphosphate (IP3), a molecule that leaves the cell membrane and diffuses within the cytosol. IP3 binds to IP3 receptors, channels that release calcium from the endoplasmic reticulum.
Detailed explanation-4: -DAG and IP3 are second messengers that can act independently or in unison. DAG activates protein kinase C and IP3 binds to a receptor on the endoplasmic reticulum to release calcium from intracellular stores.