Connecttoets
28 important questions on Connecttoets
Epinephrine inhibits salivary gland activity and muscle cell contraction in the airways, yet stimulates glycogen release in muscle cells and heart muscle cell contraction. How could one hormone have opposing effects on different organs?
Cells in the different tissues would have epinephrine receptors coupled to different signaling pathways.
A mutation in a G-protein prevents the alpha-subunit from dissociating from the beta/gamma-subunit. What effect will this have on the pathway in which the G-protein is involved?
The ligand that activates the G-protein linked receptor is ...
- Higher grades + faster learning
- Never study anything twice
- 100% sure, 100% understanding
For my 1st exam I got a C. Then, I started looking for ways to learn better and I came across Study Smart. Since then I have scored a A+, A, A- and another A. I highly recommend it to everyone who wants to hear it. I am so happy with it!!
I was struggling to finish all my first-year subjects for 3 years. Then I discovered Study Smart, which helped me to finish all of them within 3 months.
Because of StudySmart, things are going well in many ways. Before, I always had study stress and no time for anything. Now I feel calm and confident (because of the program). I used to score a B, now I usually score an A or A+.
Hey Chris, I really want to thank you very much for developing the platform, I usually got around C for my exams, now I scored an A+, an A and a A- !!
Since using Study Smart, my average has increased significantly. I even completed a statistics course with a A+ while I'm bad at statistics. I took on extra courses this year, because of Study Smart. Thanks so much!
Ever since I started studying with StudySmart I passed all my exams !!! No more re-sits!! At first, I was happy with a pass and now I only get good grades. Many thanks!
I aced all the courses I studied with Study Smart. For law, I first scored a D, and now an A! I’m 100% sure that I’ll pass all the courses I study with Study Smart.
I always thought I studied well. My grades were fine. I could never have imagined that applying these study skills would have such a huge and direct impact on my grades, my speed and the pleasure I have in learning.
For the first time, I finally feel totally confident about the way I learn. I have the perfect overview and make great progress in terms of speed and the grades I get. Thanks, Chris!
I immediately started to enjoy learning again, and my grades soared. All of a sudden, everything went better. I highly recommend Study Smart to all students..
Being able to create my materials online made the process of studying so much smoother and quicker. I no longer have to spend a huge amount of my time on creating my summaries.
At first, my notes were a mess. Now I use Study Smart to take my notes in a perfectly structured way. It helps me to save a lot of time and do other things I enjoy.
Students that study with Study Smart get better grades. The system applies all the learning methods in such a way that both well-performing students and students who struggle perform much better.
Hi Chris, I would like to thank you very much. Last year I scored C on a course, and this year I got an A+ thanks to your method! Thank you very much!
The largest effect is that my child is more enthusiastic about school! Every parent wants their children to be happy at school, Study Smart made it happen.
In high school, I failed several exams, and that has really changed now. I actually needed this tool very much back then. Since I started studying with StudySmart, I haven't had any D's. My average score is now an A and those are results I would have never had in the past
With my old method, I passed only 3 out of 8 courses. Since I started taking my notes digitally in Study Smart, I have passed all my courses on the first try. For me, StudySmart takes away the stress of wondering if I will pass or not.
Thanks to StudySmart, I passed all my exams, and with better grades than before! On top of that, I have mastered a very good study method now, which I am confident will help me earn my degree.
When inactive, the alpha subunit of the G-protein is bound to ...
As a result of the ligand binding to its site on the G-protein-linked receptor,
If a ligand were stuck in the G-protein-linked receptor, what would be the effect to the cell?
When the acetylcholine receptor sites are not occupied
the sodium channels remain closed.
Why is it possible for Na+ to enter the cell when the channel is open?
Nicotine is a molecule that is chemically similar to acetylcholine and binds to the same receptors. What affect will nicotine have on the cell shown in the animation?
Whicg signaling molecules crosses the cell membrane the easiest?
The inhibitor of an intracellular signal receptor is defective, such that even when stimulated by a signal molecule, the inhibitor stays bound to the receptor. What effect will this have on the signaling pathway?
The alpha subunit can repeatedly dissociate from and associate with the remainder of the G-protein as long as the ligand is bound to the receptor.
TRUE OF FALSE
Inactivation of the alpha subunit occurs when its own phosphorylase activity removes a phosphate from the GTP. TRUE/FALSE
A mutation has occurred, disabling Ca2+ channels in the endoplasmic reticulum so that they can no longer open. The action of which molecule will this mutation this most affect?
If adenylyl cyclase gets 'stuck on', what will be the result to the cell?
In some cases, just a few hormone molecules binding to the surface of a cell can trigger a very large response because...
A substrate binding to an enzyme is most similar to a signal molecule binding to a
When a cell makes a cell membrane bound growth factor that binds to receptors on neighboring cells causing them to proliferate, this is an example of
When sodium ions move from one cardiac muscle cell to an adjacent cell, causing them to contract in unison, this is an example of
Diabetics can be given the ____ insulin which binds to receptors on cells throughout the body increasing glucose uptake.
What do G-protein coupled, enzyme-linked, and ligand-gated ion channel receptors have in common?
When epidermal growth factor binds to its _____________, the receptor phosphorylates itself, triggering a signal transduction pathway.
A phosphatase is capable of dephosphorylating molecules. What would this enzyme do in a signal transduction pathway that used a kinase cascade?
What do enzyme-linked receptors and growth factor receptors have in common?
Both possess kinase activity when bound to a hormone.
Some anticancer drugs block signal transduction pathways activated by growth factors. Which of the following would be a good target for such a drug?
Smooth muscle cells in the airways relax while those in the blood vessels contract in response to the hormone epinephrine. What would you expect to be different in these two types of cells exposed to epinephrine?
The molecule directly responsible for breaking down cAMP to inactive AMP is
The production of second messengers in signal transduction offers at least two advantages, speed and
Try our study magic for free
a PDF, study it super fast
- No sign up, email or credit card needed!
- AI makes unlimited flashcards
- Get unlimited quizzes and tests
- Ask AI anything
- No sign up, email or credit card needed!
- Have and keep perfect overview
- Make flashcards, notes and mind maps
- Review, test and score!
The question on the page originate from the summary of the following study material:
- A unique study and practice tool
- Never study anything twice again
- Get the grades you hope for
- 100% sure, 100% understanding
