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What cell determine cell activities?
The binding of a hormone to a receptor is the first step. Target cell activation by hormone-receptor interaction depends equally on 3 factors. First the blood levels of the hormone, second ,relative numbers of receptors for that hormone on or in the target cells and the third ,strength of the binding between the hormone cell and the receptors.
Which type of hormone receptor-plasma membrane bound or intracellular- would be expected to provide the most long lived response to hormone binding and why?
Intracellular receptor responses would be longer since they create a hormone-receptor complex which stimulates the production of mRNA, which then creates proteins. This complex must be degraded over time. Also, the entire process takes longer. Intracellular receptor responses would be longer since they create a hormone-receptor complex which stimulates the production of mRNA, which then creates proteins. This complex must be degraded over time. Also, the entire process takes longer.
Which of the choices below is not a factor required for target cell activation by hormone receptor interaction?
Protein synthesis is not a factor required for target cell activation by hormone receptor interaction. The essential factors include binding of the hormone to its receptor, conformational changes in the receptor, and activation of intracellular signaling pathways.
What membrane protein is responsible for binding hormones that can switch on a cell?
The membrane protein responsible for binding hormones that can switch on a cell's response is typically a hormone receptor. These receptors are often found on the surface of the cell membrane and can activate signaling pathways inside the cell in response to hormone binding.
Why is the shape of hormone receptors so important in the human body?
The shape of hormone receptors is crucial because it determines the binding specificity between the hormone and the receptor. When a hormone attaches to its specific receptor, it triggers a signaling cascade that regulates various physiological processes in the body. The specific shape ensures that only the correct hormone can bind to the receptor, leading to a specific biological response.
How is hormone specificity achieved?
each hormone receptor only binds to one hormone
What is the first step in epinephrine signaling?
The first step in epinephrine signaling is the binding of epinephrine to its receptor on the cell membrane, typically a G protein-coupled receptor. This binding initiates a cascade of intracellular signaling events that ultimately lead to the desired physiological response.
What feature of target cells allows hormonal action?
Target cells have specific receptors on their surface that can bind to hormones. These receptors are typically highly specific, allowing the hormone to deliver its message only to cells that have the appropriate receptor. Once the hormone binds to the receptor, it triggers a series of intracellular events that ultimately lead to the desired cellular response.
What determines if a cell is a target cell for a particular hormone?
If the signal molecule is able to fit through the cell membrane, it will bind to an intracellular receptor, if it cannot pass through the cell membrane, it will bind to an external membrane-surface receptor.
What membrane proteins is responsible for binding hormones that can trigger changes in the cells activity?
The membrane proteins responsible for binding hormones and triggering changes in cell activity are called hormone receptors. These receptors are typically located on the cell membrane and can be categorized into different types based on their structure and mechanism of action. Upon hormone binding, these receptors initiate signal transduction pathways that lead to specific cellular responses.
Do Hormones bind to receptor proteins with high capacity and low affinity?
Hormones do not bind to receptors with high capacity. The major defining properties of a hormone-receptor interaction, and what determines the strength of response is binding affinity and efficacy.
What are two ways in which the chemical message of a hormone is converted into a cell response inside the cell?
One way is through binding of the hormone to a receptor on the cell surface, leading to the activation of intracellular signaling cascades. Another way is by the hormone entering the cell and interacting with receptors within the cytoplasm or nucleus to alter gene expression and protein synthesis.
