Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
Which cytoskeletal element mediates cell crawling?

Transcribed Image Text:**Cytoskeletal Components and Their Sizes**
The diagram illustrates three main types of cytoskeletal filaments, each characterized by distinct diameters and structures:
1. **Microtubules**
- **Color:** Purple
- **Structure:** Tubular
- **Diameter:** 25 nm
- **Description:** Microtubules are cylindrical structures that play a crucial role in providing mechanical support, shaping the cell, and facilitating intracellular transport.
2. **Actin Filaments (Microfilaments)**
- **Color:** Green
- **Structure:** Twisted double strands
- **Diameter:** 7 nm
- **Description:** Actin filaments are the thinnest among the cytoskeletal components and are essential for cell movement and stability. They are involved in muscle contraction and changes in cell shape.
3. **Intermediate Filaments**
- **Color:** Blue
- **Structure:** Rope-like fibers
- **Diameter:** 10 nm
- **Description:** Intermediate filaments provide structural support and mechanical strength to cells. They help maintain the integrity of the cell architecture and resist tension.
This representation helps visualize the varied structural roles of the cytoskeleton within the cell.
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