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Channel linked receptors bind to neurotransmitters. (also called ion channels and ligand gated ion channels) A ligand is the signal molecule i.e the neurotransmitter.
Hormones bind to intracellular receptors because hormones are non polar and can cross the cell's plasma membrane. (also called cytoplasmic receptors)
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Is a protein that forms an ion channel through a membrane is most likely to be a peripheral protein a trans membrane protein a phospholipid an enzyme or an entirely outside the phospholipid?
A protein that forms an ion channel through a membrane is most likely to be a transmembrane protein. Transmembrane proteins span the lipid bilayer, allowing them to create channels for ions to pass through the membrane. Peripheral proteins are typically found on the surface of the membrane and do not form channels.
What substances would most likely require a protein to facilitate its diffusion across a cell membrane?
Quick answer: glucose Explanation: Any substance that the membrane selects against requires integral proteins to cross the membrane. B/c the lipid bilayer is selectively permeable, not all substances can pass through it by diffusion or osmosis. However, when the cell requires a substance that it's membrane does not easily allow to pass through, it must enter via the proteins in the membrane. They can either be carrier proteins or protein channels depending on the substance. One example of a substance which requires facilitated diffusion is glucose.
Which molecule is most likely to cause osmosis in the body?
A molecule that is not able to freely pass through the cell membrane is most likely to cause osmosis in the body. For example, large molecules like proteins or ions such as sodium or potassium can cause osmosis by creating an imbalance in solute concentration on either side of the membrane, leading to water movement across the cell membrane.
What can you conclude about the cell membrane structure if liquid soluble molecules move across the membrane?
It can be concluded that if the liquid soluble molecules move more readily across the membrane then the membrane must be made of lipids. When two parts are made of similar material then they will be more likely to allow other particles like them to pass.
A network of cytoplasmic fibers rods and granules that can collect proteins and secrete them outside the cell?
This is likely describing the endomembrane system in a cell, consisting of the endoplasmic reticulum (ER), Golgi apparatus, and vesicles. Proteins synthesized in the ER are transported to the Golgi apparatus for processing and packaging. Vesicles then carry these proteins to the cell membrane for secretion outside the cell.
Is a protein that forms an ion channel through a membrane is most likely to be a peripheral protein a trans membrane protein a phospholipid an enzyme or an entirely outside the phospholipid?
A protein that forms an ion channel through a membrane is most likely to be a transmembrane protein. Transmembrane proteins span the lipid bilayer, allowing them to create channels for ions to pass through the membrane. Peripheral proteins are typically found on the surface of the membrane and do not form channels.
What would happen if the plasma membrane were composed solely of phospholipids and no proteins?
Without proteins, the plasma membrane would not be able to perform essential functions such as transport, cell signaling, and cell adhesion. Proteins are crucial for allowing specific molecules to pass through the membrane and for communication between the cell and its environment. Without proteins, the cell would likely not survive or function properly.
What substances would most likely require a protein to facilitate its diffusion across a cell membrane?
Quick answer: glucose Explanation: Any substance that the membrane selects against requires integral proteins to cross the membrane. B/c the lipid bilayer is selectively permeable, not all substances can pass through it by diffusion or osmosis. However, when the cell requires a substance that it's membrane does not easily allow to pass through, it must enter via the proteins in the membrane. They can either be carrier proteins or protein channels depending on the substance. One example of a substance which requires facilitated diffusion is glucose.
What are the bumps seen on the fractured surface of the membrane of a freeze-fractured bilayer?
The bumps seen on the fractured surface of a freeze-fractured bilayer are likely the lipid bilayer itself. When the bilayer is fractured, the hydrophobic interior of the membrane exposes lipid molecules, which appear as bumps on the fractured surface. Additionally, proteins embedded in the membrane can also contribute to the bumps seen on the fractured surface.
What is the name of the organelle that moves proteins and other substances through the cell?
The endoplasmic reticulum are transport tubes made of membrane that move proteins and other materials through the cell, most likely sending them towards the Golgi apparatus/body.
Why are there more ribosomes in a hormone-producing cell than a skin cell?
Hormones are usually made out of proteins and lipids. Ribosomes make proteins. Skin is also protein. But most likely, more hormones are made in a hormone-producing cell (called an endocrine cell) in a faster turnover than a skin cell. Thus, there would need to be more ribosomes in the endocrine cell.
Which molecule is most likely to cause osmosis in the body?
A molecule that is not able to freely pass through the cell membrane is most likely to cause osmosis in the body. For example, large molecules like proteins or ions such as sodium or potassium can cause osmosis by creating an imbalance in solute concentration on either side of the membrane, leading to water movement across the cell membrane.
Cell membranes are asymmetrical which is a most likely explanation?
Cell membrane proteins are determined as the membrane is being packaged in the ER and Golgi. or The two sides of a cell membrane face different environments and carry out different functions.
What can you conclude about the cell membrane structure if liquid soluble molecules move across the membrane?
It can be concluded that if the liquid soluble molecules move more readily across the membrane then the membrane must be made of lipids. When two parts are made of similar material then they will be more likely to allow other particles like them to pass.
If the fatty acids of the cell membrane were completely saturated a cell would?
If the fatty acids of the cell membrane were completely saturated, the membrane would become more rigid and less fluid. This rigidity could impair the membrane's ability to facilitate the movement of proteins and other molecules, negatively affecting cell communication and transport processes. Additionally, the overall functionality of membrane-bound enzymes and receptors would likely be compromised, impacting cellular activities.
Which structure is water most likely to pass through in the cell?
Water is most likely to pass through the cell membrane via specialized protein channels known as aquaporins. These integral membrane proteins facilitate the rapid and selective transport of water molecules across the lipid bilayer, allowing for efficient regulation of water balance in the cell. Additionally, water can also diffuse through the membrane, albeit at a slower rate, due to its small size and polarity.
A network of cytoplasmic fibers rods and granules that can collect proteins and secrete them outside the cell?
This is likely describing the endomembrane system in a cell, consisting of the endoplasmic reticulum (ER), Golgi apparatus, and vesicles. Proteins synthesized in the ER are transported to the Golgi apparatus for processing and packaging. Vesicles then carry these proteins to the cell membrane for secretion outside the cell.
