Body Fluids and Biomolecules

From the study guide

Course Outline

  1. Chemical Basis of Life
  2. Blood Composition and Plasma
  3. Blood Cells and Haematocrit
  4. Electrolytes and Fluid Balance
  5. Solutes and Osmotic Effects
  6. Water Properties and Pressure
  7. Pulmonary Surfactant
  8. Carbohydrates and Proteins

1. Chemical Basis of Life

Essential Points

  • More than 95% of a living organism is composed of oxygen, carbon, hydrogen, and nitrogen.

Memory Hook

OCHN: oxygen, carbon, hydrogen, nitrogen

2. Blood Composition and Plasma

Key Concepts & Definitions

  • Blood: Composed of formed elements suspended in a liquid called plasma.

★ Must-know

  • Plasma accounts for 55–60% of blood and contains water, inorganic salts, and proteins.

📌 Plasma is the fluid in which blood cells are suspended, whereas serum is the fluid remaining after blood has clotted and lacks platelets and fibrinogen.

Further detail

  • Carbon dioxide is a waste product of cellular respiration and can stimulate respiration when arterial carbon dioxide levels rise.

Memory Hook

Plasma carries suspended cells; serum remains after clotting

3. Blood Cells and Haematocrit

Key Concepts & Definitions

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Practice quiz preview

1. The effects of pulmonary surfactant on alveolar mechanics include:

2. Concerning globular and fibrous proteins, which statements are accurate?

3. Concerning haematocrit, which statements accurately describe the measurement?

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Flashcard preview

Which four elements compose over 95% of living organisms?

Oxygen, carbon, hydrogen, and nitrogen.

What is blood composed of?

Formed elements suspended in plasma.

What percentage of blood does plasma constitute?

55–60%.

What components does plasma contain?

Water, inorganic salts, and proteins.

What distinguishes plasma from serum?

Serum lacks platelets and fibrinogen after clotting.

What is plasma in relation to blood cells?

The fluid in which blood cells are suspended.

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Frequently asked questions

What does the Body Fluids and Biomolecules study guide cover?

It covers the core concepts of Body Fluids and Biomolecules, organized by topic with the key definitions, explanations and takeaways, so it's easier to learn and remember.

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How many questions are in the Body Fluids and Biomolecules quiz?

The practice quiz has 18 multiple-choice questions, each with an explanation. Use it to check what you know and find your gaps.

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How do I study Body Fluids and Biomolecules with flashcards?

There are 46 flashcards on Body Fluids and Biomolecules, with a question on the front and the answer on the back. Try to recall each answer before you flip, and let spaced repetition bring back the ones you miss.

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