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Extracellular
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What types of ligands enter by receptor-mediated endocytosis?
Ligands that enter cells via receptor-mediated endocytosis include hormones, growth factors, and various proteins. These ligands bind to specific cell surface receptors, triggering internalization into the cell through invagination of the plasma membrane and formation of vesicles.
Can insulin pass through a lipid bilayer?
Insulin cannot pass through a lipid bilayer by simple diffusion due to its large size and hydrophilic nature. Instead, it requires specific transport mechanisms, such as receptor-mediated endocytosis, to enter cells. Insulin binds to its receptors on the cell surface, triggering a cascade of events that allow glucose uptake and other cellular responses.
Where is the receptor for cortisol found?
Receptors of protein hormones are present in plasma membrane but for steroid hormones no membrane receptors are needed as they can enter cell membrane , mobile receptors pic steroid hormones from cell membrane and carry them to nucleus .
Some hormones enter cells via?
Some hormones enter cells via membrane receptors that undergo conformational changes when the hormone binds to them. This binding activates intracellular signaling pathways that can lead to changes in gene transcription and ultimately influence cell function.
Acetylcholine binds to its receptor in the sarcolemma and triggers .?
Acetylcholine binds to its receptors on the sarcolemma, leading to the opening of ion channels that allow sodium ions (Na+) to enter the muscle cell. This influx of sodium ions depolarizes the sarcolemma, generating an action potential. The action potential then travels along the T-tubules, ultimately triggering the release of calcium ions from the sarcoplasmic reticulum, which initiates muscle contraction.
Some hormones enter cells via what?
Some hormones enter cells via specific hormone receptors located on the cell membrane. Once the hormone binds to its receptor, it triggers a series of intracellular signaling cascades that ultimately lead to a cellular response.
When a substance wants to enter the cell it binds to what?
When a substance wants to enter a cell it goes through the cell membrane in a process called endocytosis.
How does insulin facilitate the transport of glucose into the cell?
Insulin binds to specific receptors on the cell membrane, triggering a series of chemical reactions that result in the activation of glucose transporters. These transporters then move to the cell membrane and allow glucose to enter the cell, where it can be used for energy production or stored for later use.
What process does cholesterol enter the cell?
Cholesterol enters the cell through receptor-mediated endocytosis. It binds to specific receptors on the cell membrane, forming a complex that is then taken into the cell through endocytosis. Once inside, the cholesterol is released and can be used for various cellular functions.
What hormones can enter the target cell and bind to receptors in the nucleus?
Steroid hormones, such as estrogen and testosterone, are able to enter the target cell and bind to receptors in the nucleus. These hormones are lipid-soluble, allowing them to pass through the cell membrane and directly interact with nuclear receptors to regulate gene transcription.
What hormone can enter the target cell and bind to receptors in the nucleus?
steriod hormones - since they are lipophilic and fusses with the membrane to enter teh cell.
Do extrinsic proteins act as cell receptors?
yes, for things like hormones. they are only situated on the outside of the plasma membrane- unlike intrinsic proteins which act as channel, or hydrophillic pores which allow charged molecules to enter the cell.
