BIOL 4100 EXAM 5 REVIEW QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE
3 views 0 purchase
Module
BIOL4100
Institution
BIOL4100
BIOL 4100 EXAM 5 REVIEW QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE
Primary messengers may belong to what classes of molecules?
Proteins, Steroids, Fatty acid derivatives, Amino acid derivatives, Gases
Juxtacrine signaling
is mediated by cell to cell contacts
Endocrine...
involves secretion of the hormone into the blood stream
Paracrine signaling
depends on local mediators and acts on neighboring cells
Autocrine signaling
is when secreted mediator regulates the cell that secreted it
Notch signaling is an example of
a. paracrine signaling
b. autocrine signaling
c. endocrine signaling
d. juxtacrine signaling
d. juxtacrine signaling
Adrenaline signaling is an example of
a. autocrine signaling
b. juxtacrine signaling
c. endocrine signaling
d. paracrine signaling
, c. endocrine signaling
Describe mechanism of cell response to progesterone.
Is response gradual or all-or-none on the tissue level? (1pt)
Is response gradual or all-or-none on the level of individual cells? (1pt)
Explain how response on the cellular level results in reponse on the tissue level
(2 pts).
There is a gradual response on the tissue level and an all or none response on the
cellular level. The way I think of it is like grains of sand in a jar. The grains of sand are
the individual cells and the height of the sand in the jar represents the gradual
response. So basically, the cells either have the progesterone or they do not. When
they do have it, they add to the gradual response being created in the tissue.
Explain concept of the feedback loop in signaling networks.
Explain how positive feedback loop operates (1pt). Provide example of the
positive feedback loop (1 pt).
Explain how negative feedback loop operates (1pt). Provide example of the
negative feedback loop (1 pt).
Positive Feedback Loop: stimulus --> A --> B --> A --> B and so on. Basically whatever
is being made causes more of the same to be produced.
Negative Feedback Loop: stimulus --> A --> B --> 0 Basically, the negative feedback
goes against what the stimulus produces and prevents more from being made.
Feedback loops are very important in the MAP kinase pathway. The production of ERK
is positive for the activation of Raf. The production of ERK is negative for the GRB2
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 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 NurseAdvocate. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £8.10. You're not tied to anything after your purchase.
