PHGY 210 Lecture : PHGY210- Lecture 38- Dr. Takano.docx

15 views6 pages

magentacricket108

14 May 2012

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Responses to acidosis (high h+ concentration: sufficient h+ are secreted to reabsorb all the filtered hco3, still more h+ are secreted and this contributes new hco3 these h+ are excreted bound to non-hco3. 2-: tubular glutamine metabolism and ammonium excretion are enhanced, which also contributes new hco3. Than usual are added to the plasma, thereby compensating for the acidosis. The urine is highly acidic (lowest attainable ph = 4. 4). Responses to alkalosis (low h+ concentration: rate of h+ secretion is inadequate to reabsorb all the filtered hco3. , so the significant amounts of hco3: there is little or no h+ secretion on non-hco3. Urinary buffers: tubular glutamine metabolism and ammonium excretion are decreased, so that little or no new hco3. Is contributed to the plasma from this source. Will decrease, thereby compensating for the alkalosis. The urine is highly alkaline (ph > 7. 4).

Related Questions

Two goats at Port Hopeless, Ontario accidentally get into a fieldcontaining radioactive grass. The goat "Aristophanes" eats twice asmuch grass as the goat "Demetrius". However Aristophanes'metabolism is 1.5 times faster than that of Demetrius and theingested isotope has in this case a biological decay constant whichis directly proportional to metabolism. If the biological decayconstant is 0.10 day-1 in Demetrius, how long will it be until thetwo goats contain the same concentration of isotope? Assume thatthe physical half life is very long compared to the biological halflives.

Ans: 14 days

A "pulse oximeter" operates by using light and a photocelltomeasure oxygen saturation in arterial blood. The transmissionoflight energy as it passes through a solution oflight-absorbingmolecules is described by the Beer-Lambert law,given below, whichgives the decrease in intensity I in terms of thedistance L thelight has traveled through a fluid with aconcentration C of thelight-absorbing molecule.

I =I₀10^-ÎµCLorlog₁₀(I / I₀)=-ÎµCL

The quantity Îµ is called the extinctioncoefficient, andits value depends on the frequency of the light.(It has units ofm²/mol.) Assume that the extinctioncoefficient for 660nm light passing through a solution ofoxygenated hemoglobin isidentical to the coefficient for 940 nmlight passing throughdeoxygenated hemoglobin. Assume also that 940nm light has zeroabsorption (Îµ = 0) inoxygenated hemoglobin and 660 nmlight has zero absorption indeoxygenated hemoglobin. If 31% oftheenergy of the red source and 78% of theinfrared energy istransmitted through the blood, determine thefraction of hemoglobinthat is oxygenated.

Your response is within 10% of the correctvalue. This may be due toroundoff error, or you could have amistake in your calculation.Carry out all intermediate results toat least four-digit accuracyto minimize roundofferror.%

I was usingthis as a guide but I get the same answer anditswrong:/answers-mar-09/physics/urgent-need-help-please-a-pulse-oximeter-operates-by-using-light-and-a-photocell-to_514319.aspx

Hi this is the introduction that I have written for my poster. Myposter is on the following URL (please have a look!).

http://i55.tinypic.com/e0g0w5.jpg

Please correct the introduction for any scientific or grammaticalerrors and give me your suggestions about this section as well asthe overall poster. Thanks

This is very important so if you are not good at it pleasedon't answer.

Here is the introduction :

Have you ever thought about why would thrilling rides getyou excited, make your heart racing orsometimes even make you start screaming from the depths of yourcore, forming a bead of sweat on your forehead?

Well, the answer lies in physics. These rides demonstratevery good examples of the physics laws and concepts involved innature and their affect on us in real life applications.

Height, weightlessness, high velocity, hugeacceleration, the sudden impulse and themomentary change in momentum, the work being done and the suddenchange in energy are all factors that contribute inmaking a thrilling ride an exciting one. Those factorsmake adrenalin concentrations in our body system increasecausing higher blood pressure thus stimulating theheart.. They also make the rider in a lot ofuncertainty and unexpected visual cues.

An example of a thrilling ride is the Giant Drop which isa freefall ride involving the drawing of an eight seat carriage bytwin cables to the top of the tower. After one minute full ofanxiety, the riders are plummeted down a height of 39 stories(almost 115m) then brought to a halt within meters from the groundby a sophisticated magnetic braking system.

PHGY 210 Lecture : PHGY210- Lecture 38- Dr. Takano.docx

Document Summary

Get access

Related Documents

PHGY 210 Lecture Notes - Lecture 33: Nephron, Hyperkalemia, Hypokalemia

PHGY 210 Lecture Notes - Glutamine, Collecting Duct System, Extracellular Fluid

PNB 2265 Lecture Notes - Lecture 24: Formaldehyde, Extracellular Fluid, Glutamine

Related Questions