You need to login first

Login information

Haven't yet registered?

×
* * * *

Donate

Your donation is safe and helps support the issues and causes you care about most.
Pages: 1  Down
  New Topic  |  Print  
Physioex 9.0 Exercise 6 Cardiovascular Physiology Activities 1 & 2
Read 4071 times | 1 Replies | Average Rating: Not Rated Yet
jnodland13564
Lancelet
*
Posts: 2
Points: 45
Rep:  +0   -0

Joined: Aug, 2012


Seeking a more comfortable homework help environment? Homework Clinic
Does anyone have the answer to Physioex 9.0 Exercise 6 Cardiovascular Physiology Activities 1 & 2 questions 1-16?? anything would be greatly appreciated!!! Thanks!!

ACTIVITY 1:  Investigating the Refractory Period of
Cardiac Muscle
1.   Which of the following types of muscle tissue can depolarize spontaneously in the absence of any external stimulation:
a.   Skeletal muscle
b.   Smooth muscle    
c.   Cardiac muscle
d.   All of the above
2.   Look at Figure 6.1, the cardiac action potential.  The period of time between the beginning of the cardiac action potential and the approximate middle of phase 3 is the __________________ refractory period of cardiac muscle.
3.   In this simulation, when you delivered several single stimuli very rapidly, you saw a double peak.  The second peak is called an ______________.
4.   True or False:  In order for the heart to function the most effectively in pumping blood, the ventricles must contract and then relax fully with each beat.
5.   Explain why the larger waves seen on the oscilloscope represent ventricular contractions.
6.   Explain why the amplitude of the wave did not change when you increased the frequency of the stimulation.  (HINT: Relate your response to the refractory period of the cardiac action potential.)
7.   Why is it only possible to induce an extra systole during relaxation.
8.   Explain why wave summation and tetanus are not possible in cardiac muscle tissue.
ACTIVITY 2:  Examining the Effect of Vagus Nerve Stimulation
9.   Cranial nerve 10, the vagus nerve, is an important part of which nervous system…the sympathetic or parasympathetic?

10.   True or False:  Both the sympathetic nervous system and the parasympathetic nervous system can cause the heart rate to change and affect the strength of contraction of the heart. 
11.   In this simulation, at rest the frog heart was “beating” at ______ beats/minute.  After stimulation with the vagus nerve at 50 times/minute, the heart rate ___________.
12.   Both the vagus nerve and a branch of the sympathetic nervous system innervate the
a.   heart muscle.
b.   sinoatrial (SA) node.
c.   bundle of His.
d.   Purkinje fibers.
13.   Explain the effect that extreme vagus nerve stimulation had on the heart.
14.   The SA node of the heart is located in the muscle of the ______  _______.  (HINT:  Which chamber?)
15.   Describe how the sympathetic and parasympathetic nervous systems work together to regulate the heart rate.
16.   What do you think would happen to the heart rate if the vagus nerve were surgically cut?

LoggedReport this PostReport Abuse

Reply# 1
*
Posts: 7651
Points: 2724
Rep:  +343   -8

Physioex 9.0 Exercise 6 Cardiovascular Physiology Activities 1 & 2
Aug 29, 2012

Best to follow the forum rules and post one question per thread. Otherwise you won't get the attention of trusted members.



Report this PostReport Abuse
Pages: 1    Up
  New Topic  |  Print  
 
Related Topics
Replies Author Last post
1
Reply
PhysioEx 8.0 Exercise 6 Frog Cardiovascular Physiology in Anatomy and Physiology
Started by Caitlyn | Views: 6491
Last post Last post by abc123
Nov 3, 2011
2
Replies
PhysioEx 8.0 Exercise 5 (Cardiovascular Dynamics), Activities 5 & 6--Plz Help! in Anatomy and Physiology
Started by Caitlyn | Views: 1978
Last post Last post by Caitlyn
Nov 10, 2011
3
Replies
PhysioEx 8.0 Exercise 5 (Cardiovascular Dynamics), Activities 5 & 6--Plz Help! in Anatomy and Physiology
Started by Caitlyn | Views: 6823
Last post Last post by tpeters76
Mar 14, 2012
0
Replies
SOLVED PhysioEx 9.0 Exercise 6 CARDIOVASCULAR PHYSIOLOGY in Anatomy and Physiology
Started by deatrix | Views: 46
Last post Last post by deatrix
Apr 18, 2014
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.