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What causes increased permeability of the endothelial-capsular membrane?
Wiki User
∙ 9y ago
Histamines
Wiki User
∙ 10y ago
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What causes edema that occurs during the inflammatory process?
Increased capillary permeability
Does hypercalcemia cause depression of the nervous system?
Yes, hypercalcemia (high levels of calcium in the blood) can cause depression of the nervous system. Excess calcium can interfere with the normal functioning of nerve cells, leading to symptoms such as confusion, fatigue, weakness, muscle aches, and depression. Treatment involves addressing the underlying cause and restoring calcium levels to normal range.
Why is cell membrane impermeable to organic anions?
The cell membrane is impermeable to most ions. An ion channel is needed for cations and anions to cross the membrane, thus they can't freely pass the plasma membrane. Axons of neurons lack specific permeability for anions - which might explain why your asking this question and why you think cells lack anionic permeability (which they don't). Ion channels in the axon have pores with high concentrations of negatively charged amino acids on the cellular and extracellular sides of the channel. This causes a repulsion of anion's while attracting cations, however being simple diffusion it's important not to suggest that the cations are being sucked out like a vacuum, the concentration gradient plays a predominant when dictating which ions and how fast they will be diffusion into our out of the cell.
What is the effect of heat on beetroot?
The effect of heat on beetroot is that the membrane becomes impacted. It causes the membrane to be more permeable.
What causes cell membrane to depolarize?
It's during the "rising phase" when the membrane potential becomes more positive.
Why does the permeability of blood vessels increase during acute inflammation?
vasodilation causes increased pressure within the blood vessel which causes gaps within endothelium to form-this allows for the increased permeability.
What causes edema that occurs during the inflammatory process?
Increased capillary permeability
What change takes place in the cell membrane if a signal molecule causes a transport protein to open?
A permeability change takes place.
What is the Principle of Loudspeaker?
Electric energy cause a membrane to move by turning into mechanical energy. The movement of the membrane causes the air pressure to besequentially increased and rarefied. This "train" of increased and rearefied air pressure propagates into the room, and if it strikes our ear drums we perceive it as sound.
Does hypercalcemia cause depression of the nervous system?
Yes, hypercalcemia (high levels of calcium in the blood) can cause depression of the nervous system. Excess calcium can interfere with the normal functioning of nerve cells, leading to symptoms such as confusion, fatigue, weakness, muscle aches, and depression. Treatment involves addressing the underlying cause and restoring calcium levels to normal range.
Why is selective permeability important?
Selecive permeability is important because it keeps cells functioning properly by letting only wanted molecules (solutes) in and unwanted solutes out. In addition to keeping the "bad stuff" out (e.g. bacteria, viruses), selective permeability is essential to the function of our nervous system. Without it, our neurons would not "fire". This is because selective permeability (think sodium potassium protein pump and active transport that requires ATP), creates a negative membrane potential. At rest potassium ions flow out but the membrane is impermeable to sodium ions. Neuron to neuron signaling occurs when there is a depolarization at an axon that causes the permeability to temporarily "switch" so that potassium and sodium ions can enter the cell. This triggers an action potential which jumps along nerve cells. This action potential is converted into a chemical signal as it triggers a calcium ion influx which in turns triggers the production and transportation of neurotransmitter-vesicles, and exocytosis into the synapse between neurons. Receptors on the adjacent neuron receive the neurotransmitter and the "signal" is communicated onwards. Protein pumps return levels of Na, K and CA to "resting" levels awaiting the next signal. Without selective permeability gradients of Na, K, CA and other ions could not be created to "drive" these and other processes. There is much more that can be said about selective permeability. It allows glycoproteins to sit in the cell membrane and act as antibodies and glycolipids to act as signals on the cell membrane. Proteins embedded in the cell membrane can change shape and respond to feedback loops controlling the influx and efflux of substances and maintaining homeostasis.
What causes water to go back into the earth?
gravity and soil permeability (spaces in between sand particles)
The combining of the neurotransmitter with the muscle membrane receptors causes the membrane to become permeable to sodium ions and blank of the membrane?
Depolarization
Why is cell membrane impermeable to organic anions?
The cell membrane is impermeable to most ions. An ion channel is needed for cations and anions to cross the membrane, thus they can't freely pass the plasma membrane. Axons of neurons lack specific permeability for anions - which might explain why your asking this question and why you think cells lack anionic permeability (which they don't). Ion channels in the axon have pores with high concentrations of negatively charged amino acids on the cellular and extracellular sides of the channel. This causes a repulsion of anion's while attracting cations, however being simple diffusion it's important not to suggest that the cations are being sucked out like a vacuum, the concentration gradient plays a predominant when dictating which ions and how fast they will be diffusion into our out of the cell.
What must occur first to trigger the skeletal muscle to generate an action potential and contract?
The correct one is "acetylcholine (ACh) causes temporary permeability to sodium"sodium ions rush into the cell (this is the wrong answer, so I found out the hard way). The correct one is "acetylcholine (ACh) causes temporary permeability to sodium"
When hinding of the neurotransmitters with muscle membrane receptors causes the membrane to become permeable to sodium resulting in the influx of sodium ions and what membrane?
action potential of the sarcolemma(the membrane)
The greater influx of sodium ions results in what of the membrane?
depolarization
