IB Biology Topic D2.3.7 Medical Applications of Isotonic Solutions Revision Notes (SL/HL)

IB Biology Topic D2.3.7 Medical Applications of Isotonic Solutions Revision Notes (SL/HL) | RevisionDojo

Written by official IB examiners

Why Medicine Relies on Isotonic Solutions

Isotonic solutions match the solute concentration of body cells, so the cells neither swell nor shrink.
This makes them safe for direct contact with cells and tissues.

Intravenous Fluids Rehydrate Without Damaging Cells

Intravenous (IV) fluids rehydrate patients, deliver medications, and help maintain blood pressure.
The most common isotonic IV fluid is normal saline, which is 0.9% sodium chloride (NaCl).

Prevents cell damage: red blood cells and other cells keep their normal shape and function.
Maintains blood volume: it helps stabilise blood pressure and circulation during procedures or dehydration.

Example

Normal saline is isotonic to human blood, so it is safe to infuse directly into the bloodstream.

Organ Transplantation Uses Isotonic Solutions to Preserve Organs

During transplantation, organs must be preserved outside the body.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Why Medicine Relies on Isotonic Solutions

Isotonic solutions match the solute concentration of body cells, so the cells neither swell nor shrink.
This makes them safe for direct contact with cells and tissues.

Intravenous Fluids Rehydrate Without Damaging Cells

Intravenous (IV) fluids rehydrate patients, deliver medications, and help maintain blood pressure.
The most common isotonic IV fluid is normal saline, which is 0.9% sodium chloride (NaCl).

Prevents cell damage: red blood cells and other cells keep their normal shape and function.
Maintains blood volume: it helps stabilise blood pressure and circulation during procedures or dehydration.

Example

Normal saline is isotonic to human blood, so it is safe to infuse directly into the bloodstream.

Organ Transplantation Uses Isotonic Solutions to Preserve Organs

During transplantation, organs must be preserved outside the body.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic D2.3.7: Medical Applications of Isotonic Solutions Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Why Medicine Relies on Isotonic Solutions

Intravenous Fluids Rehydrate Without Damaging Cells

Organ Transplantation Uses Isotonic Solutions to Preserve Organs

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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Why Medicine Relies on Isotonic Solutions

Intravenous Fluids Rehydrate Without Damaging Cells

Organ Transplantation Uses Isotonic Solutions to Preserve Organs

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account