CF LL BIO HOW LIFE
3rd Edition
ISBN: 9781319536404
Author: Morris
Publisher: MAC HIGHER
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Chapter 9.2, Problem 5SAQ
Summary Introduction
Cell to cell communication takes place by sending as well as receiving chemical signals. Four players are involved in the communication between the two cells. They are signaling cell, a signaling molecule, a receptor plus the cell that responds. When the molecules involved in signaling binds with the receptor, activation of receptor takes place along with a series of reaction.
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Describe one way in which endocrine, paracrine, autocrine, and contact-dependent signaling pathways are similar to one another and one way in which they are different from one another.
How are autocrine and paracrine signaling different?
Which of the following statements is true?
Question 2 options:
a)
All cells will respond to the hormonal signal because hormones are broadcast throughout the body.
b)
The regulation of inflammatory responses at the site of an infection is an example of paracrine signaling.
c)
Paracrine signaling involves the secretion of stimuli into the bloodstream for distribution throughout the organism.
d)
The axons of neurons typically signal target cells using membrane-bound signaling molecules that act on receptors in the target cells.
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- What do steroid hormone signaling and receptor tyrosine kinase (RTK) signaling have in common? Their pathways involve G-proteins that are activated by GDP-GTP exchange. They both result in gene transcription. They both use the second messenger cAMP. The receptors are both enzymes.arrow_forwardName and explain 5 modes of hormonal/neuroendocrine and neuronal signaling. Choose one and describe in a great detail listing cells, receptors, organs, and pathway.arrow_forwardWhy can acetylcholine (or other signaling molecules) have so many different effects?arrow_forward
- What accounts for the specificity of a cellular response to a signal molecule?arrow_forwardCreate a diagram which illustrates the typical signaling mechanism of action of g protein coupled land possible routes of communication (autocrine etc.). Should show the specific molecules involved, the mechanisms of signal transduction and indicate the different pathways that are activated. It should include a specific example of a receptor, ligand and signalling pathway for each general class. Include as wide a variety of ligands and modes of action as you can. for a novel pathway.arrow_forwardIn terms of their relative duration of signaling, which of the following is the odd one out? O autocrine neural paracrine O neurohormonearrow_forward
- Why do peptide and steroid hormones bind different kinds of receptor, and how does this difference affect the resulting signaling pathways in the target cell?arrow_forwardWhat role, if any, do the noncanonical Wnt signaling pathways have inplanarian regeneration?arrow_forwardThis is a signaling pathway that involves a second messenger: epinephrine → G protein-coupled receptor → G protein → adenylyl cyclase → cAMP. Which one is known as the second messenger?arrow_forward
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Intro to Cell Signaling; Author: Amoeba Sisters;https://www.youtube.com/watch?v=-dbRterutHY;License: Standard youtube license