IB Biology Topic B3.2.12 Exchange of Substances Between Tissue Fluid and Cells in Tissues Revision Notes (HL)

IB Biology Topic B3.2.12 Exchange of Substances Between Tissue Fluid and Cells in Tissues Revision Notes (HL) | RevisionDojo

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Tissue Fluid: The Internal Environment Where Cells Exchange Substances

Tissue fluid is the medium that bathes every cell, and it is where cells exchange materials with the blood.
Oxygen and nutrients pass from the fluid into cells, while carbon dioxide and wastes pass out into the fluid.

Tissue fluid forms when plasma is filtered out of capillaries, so its makeup follows closely from the makeup of plasma.

Plasma: The Source Fluid That Tissue Fluid Comes From

Definition

Plasma

The liquid component of blood, consisting mostly of water, proteins, and other substances.

Plasma makes up about 55% of blood and carries nutrients, gases, hormones, and waste.
It is mostly water (about 90%), with these key components dissolved in it:
1. Water: the main component, acting as a solvent and transport medium.
2. Plasma proteins: albumin, globulins, and fibrinogen, which stay in the blood and generate osmotic pressure.
3. Nutrients: glucose, amino acids, and lipids.
4. Electrolytes: sodium, potassium, chloride, and calcium.
5. Wastes: urea, creatinine, and carbon dioxide.
6. Hormones: chemical messengers that regulate body functions.

Tip

Albumin is the key protein for holding water in the blood by osmosis.

What Tissue Fluid Contains: Plasma Minus the Large Proteins

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Tissue Fluid: The Internal Environment Where Cells Exchange Substances

Tissue fluid is the medium that bathes every cell, and it is where cells exchange materials with the blood.
Oxygen and nutrients pass from the fluid into cells, while carbon dioxide and wastes pass out into the fluid.

Tissue fluid forms when plasma is filtered out of capillaries, so its makeup follows closely from the makeup of plasma.

Plasma: The Source Fluid That Tissue Fluid Comes From

Definition

Plasma

The liquid component of blood, consisting mostly of water, proteins, and other substances.

Plasma makes up about 55% of blood and carries nutrients, gases, hormones, and waste.
It is mostly water (about 90%), with these key components dissolved in it:
1. Water: the main component, acting as a solvent and transport medium.
2. Plasma proteins: albumin, globulins, and fibrinogen, which stay in the blood and generate osmotic pressure.
3. Nutrients: glucose, amino acids, and lipids.
4. Electrolytes: sodium, potassium, chloride, and calcium.
5. Wastes: urea, creatinine, and carbon dioxide.
6. Hormones: chemical messengers that regulate body functions.

Tip

Albumin is the key protein for holding water in the blood by osmosis.

What Tissue Fluid Contains: Plasma Minus the Large Proteins

Definition

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A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic B3.2.12: Exchange of Substances Between Tissue Fluid and Cells in Tissues Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Tissue Fluid: The Internal Environment Where Cells Exchange Substances

Plasma: The Source Fluid That Tissue Fluid Comes From

What Tissue Fluid Contains: Plasma Minus the Large Proteins

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Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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Tissue Fluid: The Internal Environment Where Cells Exchange Substances

Plasma: The Source Fluid That Tissue Fluid Comes From

What Tissue Fluid Contains: Plasma Minus the Large Proteins

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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