Homeostatic Mechanisms That Maintain Body Fluid Levels
Body fluids are maintained at a constant level by several homeostatic mechanisms:
Osmosis- is the diffusion of water through a selectively permeable membrane known as a plasma membrane. Water is highly polar it is repelled by the lipid core (nonpolar) of the plasma membrane but can easily pass through the aquaporins created by the proteins in the membrane, so osmosis is happening all the time as water moves into and out of cells.
Diffusion- Is where ions move away from an area where they are more concentrated to an area where they are less concentrated, all ions contain kinetic energy and as they move around randomly at high speeds they collide forcing them to change direction with each collision
Active Transport- requires protein carriers that join together reversibly with the substances to be transported across the membrane using (ATP) to energize its protein carriers also known as solute pumping
Ref:Marieb, Elaine, N, Essentials of Human Anatomy and Physiology, Pearson, International, Edn, 9th, 2009, ppg, 76,78
Which is the most important electrolyte for the maintenance of osmosis pressure and volume in the extracellular fluid (ECF) compartment?
The most important electrolyte is sodium which is necessary for nerve impulse conduction and maintains body fluid balances.
Ref: Herlihy, Barbara, Elsevier, Saunders, The human body in Health and Illness, Edn, 4, pg, 466
Which is the main intracellular ion that maintains intracellular fluid osmotic pressure
The main intracellular ion is potassium which is a hormone regulated by the aldosterone that stimulates the distal tubule of the kidney that will excrete the potassium into the urine.
Ref: Herlihy, Barbara, Elsevier, Saunders, The human body in Health and Illness, Edn, 4, pg, 466
Activity 2.1
Mary who is 94 years old has been put in a bath with water that was to hot and has received burns to 36% of her body of varying depths
Why is dehydration and electrolyte imbalance a danger?
Osmosis- is the diffusion of water through a selectively permeable membrane known as a plasma membrane. Water is highly polar it is repelled by the lipid core (nonpolar) of the plasma membrane but can easily pass through the aquaporins created by the proteins in the membrane, so osmosis is happening all the time as water moves into and out of cells.
Diffusion- Is where ions move away from an area where they are more concentrated to an area where they are less concentrated, all ions contain kinetic energy and as they move around randomly at high speeds they collide forcing them to change direction with each collision
Active Transport- requires protein carriers that join together reversibly with the substances to be transported across the membrane using (ATP) to energize its protein carriers also known as solute pumping
Ref:Marieb, Elaine, N, Essentials of Human Anatomy and Physiology, Pearson, International, Edn, 9th, 2009, ppg, 76,78
Which is the most important electrolyte for the maintenance of osmosis pressure and volume in the extracellular fluid (ECF) compartment?
The most important electrolyte is sodium which is necessary for nerve impulse conduction and maintains body fluid balances.
Ref: Herlihy, Barbara, Elsevier, Saunders, The human body in Health and Illness, Edn, 4, pg, 466
Which is the main intracellular ion that maintains intracellular fluid osmotic pressure
The main intracellular ion is potassium which is a hormone regulated by the aldosterone that stimulates the distal tubule of the kidney that will excrete the potassium into the urine.
Ref: Herlihy, Barbara, Elsevier, Saunders, The human body in Health and Illness, Edn, 4, pg, 466
Activity 2.1
Mary who is 94 years old has been put in a bath with water that was to hot and has received burns to 36% of her body of varying depths
Why is dehydration and electrolyte imbalance a danger?