You need to login first

Login information

Haven't yet registered?

×
* * * *

Support Us

If you found our community helpful, your small donation will continue to help us reach more students around the globe. You may also like us on Facebook or follow us on Twitter.
Pages: 1     Go Down
  New Topic  |  Print  
PhysioEx 9.0 Exercise 3 Activity 8 Answers (1-5)
Read 6368 times | 6 Replies | Average Rating: Not Rated Yet
lamar
Lancelet
*
Posts: 4
Points: 65
Rep:  +0   -0


For a more comfortable homework help experience, try HomeworkClinic.com.
PhysioEx 9.0 Exercise 3 Activity 8 Review Sheet (1-5 Answers)
I had trouble with these so I found the answers worth sharing  Wink :

1.   The number of synaptic vesicles released increases when the stimulus intensity increases.

2.   There is no neurotransmitter release from the axon terminal when there are no calcium ions in the extracellular solution. Exocytosis of the synaptic vesicles is calcium dependent.

3.   Only a few were released with low Ca2+.

4.   The neurotransmitter release was less when magnesium was added.

5.   When magnesium is added to the extracellular fluid it blocks the calcium channels and inhibits the release of neurotransmitter.

Report this PostReport Abuse
replies
Reply# 1
*
Posts: 7905
Points: 4521
Rep:  +345   -11

3 years ago

What were the questions that lead to these answers? Now we're playing jeopardy aren't we Too Funny



Report this PostReport Abuse
 
Reply# 2
Posts: 4
Points: 65
Rep:  +0   -0

3 years ago

They are from the PhysioEx 9.0 Exercise 3 Review sheet for Activity 7. There are only five questions in this section that I have answered above.

-cheers



Report this PostReport Abuse
Reply# 3
*
*
Posts: 487
Points: 3495
Rep:  +41   -0

3 years ago

Here is what I had...questions are included.

1. When the stimulus intensity is increased, what changes: the number of synaptic vesicles released or the amount of
neurotransmitter per vesicle?
Your answer:
The number of synaptic vesicles released increases as the stimulus intensity increases.
2. What happened to the amount of neurotransmitter release when you switched from the control extracellular fluid to the
extracellular fluid with no Ca2+ ? How well did the results compare with your prediction?
Your answer:
Because the exocytosis of the synaptic vesicles is Ca2+- dependent, when the extracellular fluid contained no Ca2+, no
neurotransmitter was released.
3. What happened to the amount of neurotransmitter release when you switched from the extracellular fluid with no Ca2+
to the extracellular fluid with low Ca2+ ? How well did the results compare with your prediction?
Your answer:
When Ca2+ ions were added to the extracellular fluid, a small amount of neurotransmitter was released.
4. How did neurotransmitter release in the Mg2+ extracellular fluid compare to that in the control extracellular fluid? How
well did the result compare with your prediction?
Your answer:
The neurotransmitter release was less when magnesium was added.
5. How does Mg2+ block the effect of extracellular calcium on neurotransmitter release?
Your answer:
Mg. will be oxidized to Mg2+. So instead of having Ca being the reducing agent, Mg will take its place. That is how blocking occurs.



Report this PostReport Abuse
 
Reply# 4
*
Posts: 7905
Points: 4521
Rep:  +345   -11

3 years ago

Thank you Trin



Report this PostReport Abuse
 
Reply# 5
Posts: 2
Points: 46
Rep:  +0   -0

A year ago

This helped so much thank you!



Report this PostReport Abuse
Reply# 6
Posts: 9
Points: 51
Rep:  +0   -0

A year ago

What did you get through the Activity Lab itself, not for the Review section?  I'm having trouble with the lab itself and not the Review.



Report this PostReport Abuse
Pages: 1     Go Up New Topic Print
 
Related Topics
Replies Author Last post
3
Replies
General Biology | Started by LML9404 | Views: 5970
Last post Last post by duddy
3 years ago
1
Reply
General Biology | Started by shari360 | Views: 12222
Last post Last post by duddy
3 years ago
35
Replies
Anatomy and Physiology | Started by Foriiiiz | Views: 23503
Last post Last post by capataincat
3 months ago
1
Reply
Anatomy and Physiology | Started by bctyson | Views: 1428
Last post Last post by bio_man
A year ago
Note: This topic is currently locked from adding new posts. Only administrators and moderators can reply. If you'd like to contribute to this topic, start a new thread and make reference to this one. Otherwise, contact a moderator for more options.