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
![**What is happening in #4?**
**Diagram Explanation:**
The image is an illustration of a cell membrane showing different transport mechanisms across the lipid bilayer.
1. **Section labeled (1):** Represents a section of the cell membrane, composed of a phospholipid bilayer.
2. **Left Transport (2 & 3):** Shows a small blue molecule passing through the membrane, indicating passive transport, likely simple diffusion or osmosis.
3. **Middle Transport (4 & 5):** Illustrates sodium ions (Na⁺) moving through a protein channel. This represents active transport, where ions are moved against their concentration gradient with energy input, marked by #4.
4. **Right Transport (6 & 7):** Shows larger orange molecules being moved through another protein channel, suggesting facilitated diffusion.
**Answer Options:**
- ○ passive transport - simple diffusion
- ○ active transport
- ○ passive transport - osmosis
- ○ passive transport - facilitated diffusion](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F163131d0-6037-42fc-9b0d-851f8190a8f9%2Ff26a6ae5-18bf-4e5b-aa79-08394208551f%2Fsqlyx3c_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**What is happening in #4?**
**Diagram Explanation:**
The image is an illustration of a cell membrane showing different transport mechanisms across the lipid bilayer.
1. **Section labeled (1):** Represents a section of the cell membrane, composed of a phospholipid bilayer.
2. **Left Transport (2 & 3):** Shows a small blue molecule passing through the membrane, indicating passive transport, likely simple diffusion or osmosis.
3. **Middle Transport (4 & 5):** Illustrates sodium ions (Na⁺) moving through a protein channel. This represents active transport, where ions are moved against their concentration gradient with energy input, marked by #4.
4. **Right Transport (6 & 7):** Shows larger orange molecules being moved through another protein channel, suggesting facilitated diffusion.
**Answer Options:**
- ○ passive transport - simple diffusion
- ○ active transport
- ○ passive transport - osmosis
- ○ passive transport - facilitated diffusion
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