BPK 110 Lecture Notes - Dietary Fiber, High-Protein Diet, Chopping And Channeling

49 views5 pages

goldgerbil543

11 Aug 2012

School

Simon Fraser University

Department

Biomedical Physio & Kines

Course

BPK 110

Professor

Gina Whitaker

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

Document Summary

2/3 intracellular (inside cells), 1/3 extracellular (outside cells) Water moves by osmosis to achieve proper solute concentrations. Blood pressure (the amount of force exerted by the blood against the walls of arteries), which moves water through blood vessels and into tissues. Water intake is about 2950ml or 12. 5 cups per day. Water output is also about 2950ml or 12. 5 cups per day. Adequate water levels maintain blood volume, which helps maintain blood pressure. Maintaining blood pressure is critical for nutrient delivery. Water levels are maintained by regulating water intake and output. Water output is regulated at the kidneys by 3 hormones: antidiuretic hormone (adh, angiotensin ii, aldosterone. Thirst is a powerful urge but often lags behind the need for water, we don"t or can"t always drink when we are thirsty therefore thirst alone cannot be relied on to maintain water balance. The kidneys are responsible for maintaining water balance by regulating output in urine.

Related Questions

1.Approximately, what percent of your body is composed of water

2. How is water distributed between the extracellular and

intracellular fluid compartments?

3. Which main hormones are involved in fluid regulation?

4.Where is most of the sodium and potassium found inside of the body?

5. Which micronutrients are needed for blood cell formation & blood clotting?

During hemorrhagic shock in which blood pressure is decreased, which of the regulatory mechanisms is most important is increasing cardiac output to help maintain blood pressure?

indigocod65

1) This is a thermodynamics questions

In your body, normal osmolarity of blood serum is just under 0.3 molar. Because cell membranes are permeable to water, the osmolarity of intracellular fluid is approximately equal to that of extracellular fluid (though the intracellular and extracellular composition in terms of specific ions and proteins is quite different). As an aside, measurement of osmolarity of serum is an important clinical test used to check for dehydration or other imbalances of water and electrolytes.

a) In the supplemental information, the osmosis example presented involves sucrose as a solute, but the van't Hoff equation also applies for other solutes. Using this formula (â = cRT, where â is the excess pressure), calculate the osmotic pressure associated with 0.3 molar concentration of osmolytic particles (e.g., ions, proteins, or other dissolved particles) in contact with pure water through a semi-permeable membrane at physiological temperature of 310 K. Express your results in atmospheres of pressure (1 atmosphere of pressure is 1.0x10⁵ Pascal, where 1 Pascal is a Newton/m²).

b) A biological cell membrane is a bilayer of phospholipid molecules, only a few nanometers thick, and can basically be thought of much like a soap bubble, except immersed in aqueous solution. If cells are placed in pure water, they often swell and burst in just a few minutes. Explain why this would happen.

grayporcupine495

BPK 110 Lecture Notes - Dietary Fiber, High-Protein Diet, Chopping And Channeling

Document Summary

Get access

Related Documents

BPK 110 Lecture Notes - Lecture 8: Angiotensin, Vasoconstriction, Extracellular Fluid

BPK 110 Lecture Notes - Lecture 8: Vasopressin, Cramp, Phytic Acid

BPK 110 Lecture Notes - Lecture 8: Iodised Salt, Copper Deficiency, Micronutrient Deficiency

Related Questions