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Increased permeability of the endothelial-capsular membrane can be caused by factors such as inflammation, trauma, or infection. These conditions can disrupt the tight junctions between endothelial cells, leading to leakage of fluid and proteins from the blood vessels into the surrounding tissues.
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What causes edema that occurs during the inflammatory process?
Increased capillary permeability
Release of the chemical histamine causes?
Release of histamine causes dilation of blood vessels, increased vascular permeability, and smooth muscle contraction. This can result in symptoms such as itching, redness, swelling, and bronchoconstriction depending on the location of release and the receptors it activates.
Does hypercalcemia cause depression of the nervous system?
Yes, hypercalcemia causes nervous system depression - the opposite of (see below) According to the Human Anatomy and Physiology Textbook by Marieb, hypocalcemia causes neuron excitation and if severe enough, leads to tetany and then paralysis. this is because both serum calcium and intracellular calcium are increased. The reason hypocalcemia causes neuron excitation (contrary to the above logic) is because a decrease in extracellular calcium concentration increases the neuron membrane's permeability to sodium and allows sodium to easily depolarize the neuron's membrane and cause an action potential. Additionally The membrane threshold becomes refractory to depolarization thus many of the symptoms are related to the loss of cell membrane excitability. How extracellular calcium controls sodium membrane permeability is another question.
Why is cell membrane impermeable to organic anions?
The cell membrane is impermeable to organic anions because they are large, negatively charged molecules that cannot easily pass through the hydrophobic interior of the lipid bilayer. Additionally, organic anions may require specific transport proteins or channels to facilitate their movement across the membrane.
What cause the membrane potential of a neuron?
Opening or closing of ion channels at one point in the membrane produces a local change in the membrane potential, which causes electric current to flow rapidly to other points in the membrane.
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
Release of the chemical histamine causes?
Release of histamine causes dilation of blood vessels, increased vascular permeability, and smooth muscle contraction. This can result in symptoms such as itching, redness, swelling, and bronchoconstriction depending on the location of release and the receptors it activates.
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.
What change takes place in the cell membrane if a signal molecule causes a transport protein to open?
When a signal molecule activates a transport protein on the cell membrane, it undergoes a conformational change that opens a channel or alters its affinity for the molecule it transports. This allows specific substances to move across the membrane, facilitating cellular communication and maintaining homeostasis.
Does hypercalcemia cause depression of the nervous system?
Yes, hypercalcemia causes nervous system depression - the opposite of (see below) According to the Human Anatomy and Physiology Textbook by Marieb, hypocalcemia causes neuron excitation and if severe enough, leads to tetany and then paralysis. this is because both serum calcium and intracellular calcium are increased. The reason hypocalcemia causes neuron excitation (contrary to the above logic) is because a decrease in extracellular calcium concentration increases the neuron membrane's permeability to sodium and allows sodium to easily depolarize the neuron's membrane and cause an action potential. Additionally The membrane threshold becomes refractory to depolarization thus many of the symptoms are related to the loss of cell membrane excitability. How extracellular calcium controls sodium membrane permeability is another question.
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?
The combining of the neurotransmitter with the muscle membrane receptors causes the membrane to become permeable to sodium ions and depolarization of the membrane. This depolarization triggers an action potential that leads to muscle contraction.
Why the double bond in unsaturated fatty acid chain cause bend and what is the effect of that bend on the overall function of lipid?
The double bond in unsaturated fatty acid chains causes a kink or bend in the chain due to the inability of the cis double bond to freely rotate. This kink prevents unsaturated fatty acids from packing tightly together, leading to increased fluidity in lipid membranes. This increased fluidity affects the flexibility and permeability of the membrane, influencing various cellular processes such as transport and signaling.
Why is selective permeability important?
Selective permeability is important because it allows the cell to control what substances enter and leave the cell, maintaining internal conditions necessary for cell survival. This helps in nutrient uptake, waste removal, and signal transduction, ensuring proper cell function.
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)
