Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

2. Cell Chemistry & Cell Components

Osmosis

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Osmosis

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1:47 minutes

Problem 3

Textbook Question

What two conditions must be present for osmosis to occur?Integral membrane proteins are anchored in lipid bilayers.

Verified step by step guidance

Identify the definition of osmosis: Osmosis is the movement of water molecules across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Determine the first condition for osmosis: There must be a semipermeable membrane that allows only certain molecules, such as water, to pass through while blocking others, like solute molecules.

Determine the second condition for osmosis: There must be a concentration gradient, meaning there is a difference in solute concentration on either side of the membrane, which drives the movement of water.

Understand the role of integral membrane proteins: These proteins are embedded within the lipid bilayer of cell membranes and can assist in the transport of molecules across the membrane, but they are not directly involved in osmosis.

Conclude that osmosis specifically requires a semipermeable membrane and a concentration gradient, while integral membrane proteins are more related to facilitated diffusion and active transport.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Osmosis

Osmosis is the passive movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration. This process aims to equalize solute concentrations on both sides of the membrane, and it is crucial for maintaining cellular homeostasis.

Selectively Permeable Membrane

A selectively permeable membrane allows certain molecules or ions to pass through while blocking others. For osmosis to occur, the membrane must permit water molecules to move freely while restricting solute particles, creating the necessary concentration gradient that drives the movement of water.

Concentration Gradient

A concentration gradient refers to the difference in the concentration of a substance across a space. In the context of osmosis, a gradient exists when there is a disparity in solute concentrations on either side of a membrane, prompting water to move toward the area of higher solute concentration to achieve equilibrium.