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The efflux of potassium ions is maintained by passive potassium channels.
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What passive channels are likely found in the Pacinian corpuscle?
The efflux of potassium ions is maintained by passive potassium channels.
What passive channels are likely found in the membrane of olfactory receptor?
In the membrane of olfactory receptor neurons, passive channels such as cyclic nucleotide-gated channels and calcium-activated chloride channels are commonly found. These channels play a role in odorant detection by allowing ions like Na+ and Ca2+ to flow into the cell in response to odorant binding, which triggers the neuronal signal cascade.
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.
Can partition coefficient influence passive diffusion rate?
Yes, the partition coefficient can influence passive diffusion rate by determining how easily a molecule can move across a membrane. A higher partition coefficient typically means the molecule is more likely to dissolve in the lipid bilayer of the membrane, thus facilitating faster passive diffusion. Conversely, a lower partition coefficient can slow down passive diffusion.
What effect does the opening of the potassium channels have on the charge difference across the neuron's membrane?
Opening of potassium channels allows potassium ions to move out of the neuron, leading to hyperpolarization by increasing the negative charge inside the neuron. This action increases the charge difference across the membrane, known as the resting membrane potential, making the neuron less likely to fire an action potential.
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.
Which word is likely to be used if someone is extremely passive?
Bovine could be a word used to describe someone who is extremely passive.
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.
What effect will opening more of these channels have on the excitability of a neuron?
Opening more ion channels, particularly those that allow sodium (Na+) or calcium (Ca2+) ions to enter the neuron, will increase the excitability of the neuron by depolarizing the membrane potential. This makes it more likely for the neuron to reach the threshold needed to generate an action potential. Additionally, increased excitability can lead to enhanced neurotransmitter release and neuronal communication. Conversely, opening more potassium (K+) channels may decrease excitability by hyperpolarizing the membrane.
What structure is the statement below most likely referring to A large glucose molecule requires facilitated diffusion but an oxygen molecule does not?
A large glucose molecule requires facilitated diffusion but an oxygen molecule does not is a semipermeable membrane.
Where in the membrane does facilitated diffusion occur?
Diffusion will most likely to occur where there is a high concentration of gas or water then the particles distibute evenly to the area of low concentration. for example if you could smell a turkey cooking in the oven from upstairs without anyone telling you.
What are special doorways in the cell membrane?
Proteins are too large to move across the phospholipid bilayer of the cell membrane so therefore require help getting into (or out of) the cell. Proteins may be brought across the cell membrane by endocytosis - they may then be broken down into amino acid building blocks (by fusion of the endocytotic vesicles with the proteolytic enzyme containing lysosomes) which can then be used by the cell or moved out of the cell by transmembrane transport proteins.
