the following is true for a peptide hormone? It... is able to pass through the cell membrane 2O can act directly in the nucleus to stimulate protein synthesis has a slower response time than a steroid hormone O utilizes a second messenger system.
the following is true for a peptide hormone? It... is able to pass through the cell membrane 2O can act directly in the nucleus to stimulate protein synthesis has a slower response time than a steroid hormone O utilizes a second messenger system.
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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Transcribed Image Text:---
### Multiple Choice Questions on Endocrine System
#### QUESTION 28
**Which of the following is true for a peptide hormone? It...**
- ☐ is able to pass through the cell membrane
- ☐ can act directly in the nucleus to stimulate protein synthesis
- ☐ has a slower response time than a steroid hormone
- ☑ utilizes a second messenger system
#### QUESTION 29
**What does a "second messenger" do?**
- ☐ It responds to a steroid hormone and carries the message into the cytoplasm of the receiving cell.
- ☑ It responds to a peptide hormone and carries the message into the cytoplasm of the receiving cell.
- ☐ It travels across the cell membrane of the receiving cell and triggers protein formation.
- ☐ It acts as a negative feedback on the receiving cell.
#### QUESTION 30
**Which of the following sets represents organs that are all derived from the mesoderm?**
- ☐ Blood vessels, muscles, bones
- ☐ Large intestine, skin, cecum
- ☐ Stomach, bones, muscle
- ☑ Nerves, muscles, stomach
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**Explanation of Concepts:**
1. **Peptide Hormones:**
- Peptide hormones, unlike steroid hormones, cannot pass through the cell membrane. They utilize a second messenger system to relay their signal inside the cell. This allows for a quick and specific response.
2. **Second Messenger:**
- A second messenger is a molecule that relays signals received at receptors on the cell surface. It is particularly involved in the mechanism of peptide hormone action. For instance, when a peptide hormone binds to its receptor on the cell surface, a second messenger inside the cell is activated to carry the message further into the cytoplasm.
3. **Mesoderm Derived Organs:**
- The mesoderm is one of the three primary germ layers in early embryonic development. It gives rise to a variety of tissues and structures, including the muscles, cardiovascular system, skeletal structures, and certain internal organs like parts of the stomach lining.
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