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

Prokaryotic & Eukaryotic Cells

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Prokaryotic & Eukaryotic Cells

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Problem 1

Textbook Question

In what way do the membranes of a eukaryotic cell vary?a. Phospholipids are found only in certain membranes.b. Certain proteins are unique to each membrane.c. Only certain membranes of the cell are selectively permeable.d. Only certain membranes are constructed from amphipathic molecules.

Verified step by step guidance

Identify the main components of eukaryotic cell membranes, which include phospholipids, proteins, and carbohydrates.

Understand that phospholipids are a fundamental component of all eukaryotic cell membranes, making option a incorrect.

Recognize that each membrane within a eukaryotic cell can have a unique set of proteins that determine its specific functions, supporting option b.

Recall that all cell membranes are selectively permeable to maintain homeostasis, which makes option c incorrect.

Know that amphipathic molecules, such as phospholipids, are a universal feature of cell membranes, making option d incorrect.

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Key Concepts

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

Membrane Composition

Eukaryotic cell membranes are primarily composed of phospholipids, which form a bilayer that is fundamental to membrane structure. However, the specific types and proportions of phospholipids can vary between different membranes, influencing their properties and functions. This variation is crucial for the distinct roles that each membrane plays within the cell.

Membrane Proteins

Membrane proteins are integral to the function of cell membranes, serving roles in transport, signaling, and structural support. Each membrane can contain unique proteins that are tailored to its specific functions, such as receptors or channels. This diversity allows for specialized interactions and processes to occur in different cellular compartments.

Selective Permeability

Selective permeability refers to the ability of a membrane to regulate the passage of substances in and out of the cell. Not all membranes exhibit the same level of permeability; for instance, the plasma membrane is selectively permeable, allowing certain molecules to pass while blocking others. This property is essential for maintaining homeostasis and facilitating cellular communication.