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What is the ability of certain hormones to attach to a cell determined by?
receptor molecules in the cell membrane
The ability of certain hormones to attach to a cell is primarily determined by the?
receptor molecules in the cell membrane
What type of membrane proteins have an exposed site on the outer cell surface that can attach to a ligand?
The type of membrane proteins that have an exposed site on the outer cell surface to attach to a ligand are called receptor proteins. These proteins are specifically designed to bind to signaling molecules, such as hormones or neurotransmitters, which can initiate a cellular response. Receptor proteins play a crucial role in cell communication and signaling pathways.
Hormones attach to plasma membrane proteins called?
Hormones attach to plasma membrane proteins called receptors. These receptors can trigger signaling pathways within the cell when activated by the hormone binding.
Explain the mechanism of action of nonsteroid hormones?
All non steroid hormones are proteinacious and can't enter cell .they attach with fixed membrane receptor which activates an enzymes that activates a second messenger i.e. cAMP that carries message in side cell .
The receptors for catecholamine and polypeptide hormones are found?
on the outer surface of the target cell
A protein on the surface of HIV can attach to what proteins on the surface of healthy human cells?
HIV's surface protein, gp120, can attach to CD4 receptors on healthy human cells. This interaction allows HIV to enter and infect the cell by binding to the CCR5 or CXCR4 co-receptors on the cell surface.
Why does a virus only attach to only one cell?
A virus attaches to a specific cell because it has proteins on its surface that can only bind to receptors on that specific cell. This binding is necessary for the virus to enter the cell and replicate. This specificity is determined by the structure of the virus and the receptors on the cell surface.
Steroid hormones bind to receptor on the surface cell?
Steroid hormones do not bind to receptors on the surface of the cell; instead, they pass through the cell membrane due to their lipid-soluble nature. Once inside the cell, they bind to intracellular receptors, often located in the cytoplasm or nucleus. This hormone-receptor complex then interacts with DNA to regulate gene expression, ultimately influencing various cellular processes. This mechanism allows steroid hormones to exert their effects on target tissues more directly than hormones that bind to surface receptors.
Can hormones enter a cell through endocytosis?
No, hormones typically do not enter a cell through endocytosis. Instead, hormones bind to receptors on the cell surface, triggering a signaling cascade that influences cellular functions. This process allows cells to respond to hormonal signals without the need for the hormone to enter the cell.
Where are the receptors for water soluble hormones?
Receptors for water-soluble hormones are primarily located on the surface of target cells, embedded in the cell membrane. These receptors are typically proteins that interact with the hormone, triggering a cascade of intracellular signaling pathways. Because water-soluble hormones cannot easily cross the lipid bilayer of the cell membrane, their binding to surface receptors is essential for conveying their effects inside the cell.
Is it true that proteins at the inner surface of the plasma membrane attach the membrane to the cell's support structure making the cell rigid?
Your question is unclear, but a cell is supported by the cytoskeleton.
