This summary is a summary of Chapter 9 of Biology A Global Apprach. This discusses cell signaling.
This summary is divided into sections as indicated in the book.
I got an 8.5 for cell biology, hopefully you too! :)
⚠ Cells register signals en uses them to respond to it. This is called cell
signaling.
Evolution of Cell Signaling
For yeast cells, there are two mating types (sex types), a and 𝛂. Each type
secretes a specific factor that binds only to receptors on the other type of cell.
When these signals bind to the other cell, they can fuse together. This forms
a /𝛂 cells which contain genes of both cells.
Local and Long-Distance Signaling
Multicellular organism usually communicate via signaling molecules targeted
for cells that may or may not be immediately adjacent. Eukaryotic cells may
communicate via local signaling:
Both animal and plant cells have cell junctions that directly connect the
cytoplasm of adjacent cells.
Celbiologie 1
, Animal cells may communicate via direct contact between membrane
bound cell-surface molecules, in a process called cell-cell recognition.
In paracrine signaling, molecules travel short distances to another cell.
Growth factors are compounds that stimulate nearby target cells to
grow and divide.
Synaptic signaling is more specialized and occurs in the nervous
system. An electrical signal along a nerve cell triggers the secretion of
neurotransmitters.
Plant and animals use hormones for long-distance signaling. Hormonal
signaling is also called endocrine signaling, specialized cells release
hormones, which travel through the blood stream to target cells.
Plant hormones sometimes travel in plant vessels but often reach target
cells by moving through cells by diffusion.
Concept 9.2 Reception
Celbiologie 2
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller dewyvanlexmond. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.43. You're not tied to anything after your purchase.
