Table of contents

1. Overview of Cell Biology2h 49m
2. Chemical Components of Cells1h 14m
3. Energy1h 33m
4. DNA, Chromosomes, and Genomes2h 31m
5. DNA to RNA to Protein2h 31m
6. Proteins1h 36m
7. Gene Expression1h 42m
8. Membrane Structure1h 4m
- The Lipid Bilayer
  38m
- Membrane Proteins
  25m
9. Transport Across Membranes1h 52m
10. Anerobic Respiration1h 5m
11. Aerobic Respiration1h 11m
12. Photosynthesis52m
13. Intracellular Protein Transport2h 18m
14. Cell Signaling1h 28m
15. Cytoskeleton and Cell Movement1h 39m
16. Cell Division3h 5m
17. Meiosis and Sexual Reproduction50m
18. Cell Junctions and Tissues48m
19. Stem Cells13m
- Stem Cells
  13m
20. Cancer44m
21. The Immune System1h 6m
22. Techniques in Cell Biology1h 41m

1. Overview of Cell Biology

Overview of Tissue Structures

Cell Biology

1. Overview of Cell Biology

Overview of Tissue Structures

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Multiple Choice

Which of the following statements about cellular layouts in tissues is correct?

Connective tissues are characterized by closely packed cells and little extracellular material.

Epithelial tissues are composed of tightly packed cells with minimal extracellular matrix.

Muscle tissues consist of loosely arranged cells separated by large amounts of extracellular matrix.

Nervous tissues are primarily made up of extracellular fibers with few cells.

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Verified step by step guidance

Step 1: Begin by understanding the characteristics of the four major tissue types: epithelial, connective, muscle, and nervous tissues. Each type has distinct structural and functional properties.

Step 2: Analyze the first statement: 'Connective tissues are characterized by closely packed cells and little extracellular material.' This is incorrect because connective tissues are typically characterized by sparse cells embedded in a large amount of extracellular matrix, which provides structural support.

Step 3: Evaluate the second statement: 'Epithelial tissues are composed of tightly packed cells with minimal extracellular matrix.' This is correct because epithelial tissues form protective barriers and are composed of closely packed cells with very little extracellular material between them.

Step 4: Examine the third statement: 'Muscle tissues consist of loosely arranged cells separated by large amounts of extracellular matrix.' This is incorrect because muscle tissues are composed of tightly packed cells (muscle fibers) that are specialized for contraction, with minimal extracellular matrix.

Step 5: Assess the fourth statement: 'Nervous tissues are primarily made up of extracellular fibers with few cells.' This is incorrect because nervous tissues are primarily composed of neurons and glial cells, with very little extracellular matrix or fibers.