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What structural feature on the surface of a plasma membrane allows cells to recognize one another?
Glycoproteins and glycolipids are structural features on the surface of the plasma membrane that allow cells to recognize one another. These molecules can act as cell identifiers by creating unique patterns that other cells can identify and respond to.
Which form of endocytosis involves a receptor?
Receptor-mediated endocytosis is the form of endocytosis that involves specific receptors on the cell membrane binding to ligands for internalization. This process allows for selective uptake of specific molecules into the cell.
What change does ACh cause in an ACh receptor?
Acetylcholine (ACh) binding to an acetylcholine receptor triggers a conformational change in the receptor protein, leading to the opening of an ion channel within the receptor. This allows specific ions, such as sodium or potassium, to flow across the cell membrane, resulting in changes in membrane potential and ultimately leading to cellular responses.
What feature of the inner membrane of the mitochondria allows this organelle to produced a great amount of energy?
a large surface area
What is a semi permeable membrane and how does it relate to cellular transport?
A semi-permeable membrane is a membrane which allows cells to pass through it. The cells which make up the membrane of the inside of the cheek of the human mouth, for example, are semi-permeable. This allows things, like nicotine for example, to be absorbed through the membrane walls while the walls maintain structural integrity.
When a receptor protein in a cell membrane acts as a enzyme the receptor protein does what?
When a receptor protein acts as an enzyme, the receptor protein activates a second messenger that acts as a signal molecule within the cell. Resources: HOLT Biology Textbook - 9th grade edition Chapter 4, Cells and Their Environment.
What characteristic does it called when the cell membrane allows only certain molecules and ions to enter or exit the cell?
Selective permeability is the characteristic of the cell membrane that allows only certain molecules and ions to enter or exit the cell. This feature helps regulate the internal environment of the cell by controlling what substances can pass through.
What type of sensory receptor allows detection of light and vision?
photoreceptors
Cell membrane performs a number of critical functions for the?
The cell membrane regulates the passage of molecules in and out of the cell, provides structural support, and allows cells to communicate with their environment. It also serves as a barrier to protect the cell's internal environment.
Every cell is surrounded by a thin membrane. What is the main function of this cell membrane?
It has a structural function that is to maintain the structural integrity of the cell and prevent all of the intracellular material from being outside.It has a physiologic/biochemical function also, and that is to regulate what enters and leaves the cell (it is semi permeable), and it also has receptors that react with substances and this is how messages are passed to and from cells.
What feature of the mitochondrion allows isolation of the proton gradient?
The inner mitochondrial membrane is the key feature that allows the isolation of the proton gradient in mitochondria. It is highly impermeable to ions and small molecules, which enables the establishment and maintenance of the electrochemical gradient (proton motive force) across the membrane. This gradient is crucial for ATP synthesis as protons flow back into the mitochondrial matrix through ATP synthase during oxidative phosphorylation.
When a neuron responds to a particular neurotransmitter by opening gated ion channels the neurotransmitter is serving as which part of the signal pathway?
The neurotransmitter functions as the ligand that binds to the receptor on the neuron's membrane, causing a conformational change that opens the ion channels. This allows ions to flow into or out of the neuron, resulting in a change in its membrane potential and ultimately transmitting the signal.
