When comparing sodium and potassium, potassium diffuses faster through a cell membrane because it...
When comparing sodium and potassium, potassium diffuses faster through a cell membrane because it is larger so charge is distributed better. However, why does chloride passively diffuse almost a million times faster than potassium through a cell membrane?
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When comparing sodium and potassium, potassium diffuses faster through a cell membrane because it...
Like other osmoregulatory animals that live in marine environments, sharks maintain tissue concentrations of sodium, potassium,...
Like other osmoregulatory animals that live in marine environments, sharks maintain tissue concentrations of sodium, potassium, and chloride that are hypoosmotic to the seawater. In contrast to the bony marine fishes, however, sharks do not need to drink seawater. Why? High urea and trimethylamine oxide concentrations keep shark tissues slightly hyperosmotic relative to seawater, so water is absorbed passively. Sharks excrete large quantities of salt through their gills in exchange for water Sodium, chloride, and potassium do not influence water...
B3. Cell Membrane and Cell Transport a) What kind of solution should a cell be placed...
B3. Cell Membrane and Cell Transport a) What kind of solution should a cell be placed in for it to become lysed? [1 mark] b) Give an example of a transmembrane protein. [1 mark] c) Which form of membrane transport does NOT require the expenditure of energy by the cell? [1 Mark] d) Given a cell with concentration of solutes in the environment lesser than the concentration of solutes in the surrounding fluid.. i. the extracellular fluid is said to...
When a current passes through the body, it is mainly carried by positively charged sodium ions...
When a current passes through the body, it is mainly carried by positively charged sodium ions (Na+) with charge +e and negatively charged chloride ions (Cl−) with charge −e. In a given electric field, these two kinds of ions do not move at the same speed; the chloride ions move 50% faster than the sodium ions. Part A If a current of 190 μA is passed through the leg of a patient, how many chloride ions pass a cross section...
_____membranes proteins are associated with the bilayer through interactions with other membrane component on the surface...
_____membranes proteins are associated with the bilayer through interactions with other membrane component on the surface of the membrane. Net movement of particles from a region where they are more concentrated to a region where they are law concentrated is called Diffusion of water through a selectively permeable membrane down its own concentration gradient It called A solution with an equivalent concentration of water and hence the tame osmotic pressure as the fluid inside the cell is said to be...
1. In both the sodium iodide test and the silver nitrate test, why does 2-bromobutane react faster...
1. In both the sodium iodide
test and the silver nitrate test, why does 2-bromobutane react
faster than 2-chlorobutane?
Bromine is a better leaving group since it is a weaker base than
chlorine is.
2. a. Why does benzyl chloride react under both
SN1 and SN2 conditions?
Benzyl
chloride is a primary alkyl halide, hence reactive under SN2
conditions.
The
primary carbocation formed due to the departure of Cl- is
stabilized by the pi electrons in the benzene ring.
b. Why is...
#2 please In this part, we will explore electrostatics as it relates to the nerve cell,...
#2 please
In this part, we will explore electrostatics as it relates to the nerve cell, a critical electrostatic device for almost all life. We will use a rather simplified picture of the nerve cell, and treat it as a parallel plate capacitor. Although oversimplified, this model does correctly describe the underlying physics. As shown in the diagram below, the nerve cell is a fluid-filled tube (the axon) that is surrounded by another fluid. The nerve cell wall (membrane) separates...
1.Bacteriorhodopsin is a protein that has 7 alpha helices embedded in the cell membrane. As such,...
1.Bacteriorhodopsin is a protein that has 7 alpha helices embedded in the cell membrane. As such, how many start-transfer and stop-transfer sequences would it need? 7 start transfer sequences, 6 stop transfer sequences 7 of each, in alternating fashion 4 start transfer sequences and 3 stop transfer sequences 7 start transfer sequences 2. The role of GTP hydrolysis by the Signal Recognition Particle during cotranslational translocation to the ER is to release the SRP after docking to the translocon so...
Michelle suffers from kidney disease because of severe strep throat she contracted as a child. When...
Michelle suffers from kidney disease because of severe strep throat she contracted as a child. When her kidneys stopped functioning, Michelle was placed on a 4-h dialysis treatment three times a week. When she arrives at the dialysis clinic, her weight, temperature, and blood pressure are taken, and blood tests are done to determine the level of electrolytes and urea in her blood. In the dialysis center, tubes to the dialyzer are connected to the catheter she has had implanted....
During the aerobic metabolism of glucose, glucose is ____________. Reduced to form water Oxidized to form...
During the aerobic metabolism of glucose, glucose is ____________. Reduced to form water Oxidized to form water Reduced to form CO2 Oxidized to form CO2 Which of the following describes the equation: FAD + XH2 à FADH2 + X. FAD is reduced to FADH2 It is a coupled reduction – oxidation reaction XH2 is oxidized to X All of the above Which of the following is FALSE about glycolysis? The initial steps of glycolysis requires energy derived from the splitting...
As a reader, let us assume that this information is relevant to you because of your...
As a reader, let us assume that this information is relevant to you because of your line of work: How would this document make more sense to you? What could make it easier to understand, or less copious for you to read? As a writer, what would you like your audience to know or to understand? Why should they care about this information and associated data? What can you do to avoid them becoming tired, bored, or uninterested in what...
B3. Cell Membrane and Cell Transport a) What kind of solution should a cell be placed in for it to become lysed? [1 mark] b) Give an example of a transmembrane protein. [1 mark] c) Which form of membrane transport does NOT require the expenditure of energy by the cell? [1 Mark] d) Given a cell with concentration of solutes in the environment lesser than the concentration of solutes in the surrounding fluid.. i. the extracellular fluid is said to...
_____membranes proteins are associated with the bilayer through interactions with other membrane component on the surface of the membrane. Net movement of particles from a region where they are more concentrated to a region where they are law concentrated is called Diffusion of water through a selectively permeable membrane down its own concentration gradient It called A solution with an equivalent concentration of water and hence the tame osmotic pressure as the fluid inside the cell is said to be...
1. In both the sodium iodide
test and the silver nitrate test, why does 2-bromobutane react
faster than 2-chlorobutane?
Bromine is a better leaving group since it is a weaker base than
chlorine is.
2. a. Why does benzyl chloride react under both
SN1 and SN2 conditions?
Benzyl
chloride is a primary alkyl halide, hence reactive under SN2
conditions.
The
primary carbocation formed due to the departure of Cl- is
stabilized by the pi electrons in the benzene ring.
b. Why is...
#2 please
In this part, we will explore electrostatics as it relates to the nerve cell, a critical electrostatic device for almost all life. We will use a rather simplified picture of the nerve cell, and treat it as a parallel plate capacitor. Although oversimplified, this model does correctly describe the underlying physics. As shown in the diagram below, the nerve cell is a fluid-filled tube (the axon) that is surrounded by another fluid. The nerve cell wall (membrane) separates...
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