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
Answer #15
Transcribed Image Text:Certainly! Here is the transcription and explanation of the text in the image for an educational website:
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**Transcription:**
14) One of the major categories of receptors in the plasma membrane functions by forming dimers, adding phosphate groups, and then activating relay proteins. Which type does this?
A) G protein-coupled receptors
B) Steroid receptors
C) Ligand-gated ion channels
D) Receptor tyrosine kinases
15) Quorum sensing or cell-to-cell communication between bacterial cells allows a population to
A) make a biofilm
B) excrete virulence factors
C) aggregate and differentiate in some species
D) all of the above
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**Explanation:**
- **Question 14** focuses on receptors in the plasma membrane that play a significant role in cell communication and signal transduction. Specifically, it describes receptors that form dimers and use phosphorylation to activate relay proteins. These are key characteristics of receptor tyrosine kinases.
- **Question 15** explores quorum sensing, a communication process used by bacteria. This process allows bacterial populations to coordinate activities such as biofilm formation, secretion of harmful factors, and aggregation or differentiation. The correct answer, D) all of the above, indicates that quorum sensing enables all these processes.
Both questions probe a student's understanding of cellular communication and receptor functions within biological contexts.
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