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BIO 202 PhysioEx Lab Report Exercise 6: Cardiovascular Physiology Activity 1: Investigating the Refractory Period of Cardiac Muscle

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PhysioEx Lab Report Exercise 6: Cardiovascular Physiology Activity 1: Investigating the Refractory Period of Cardiac Muscle Name: Morris Date: 20 February 2026 Session ID: Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1 The cardiac muscle is capable of which of the following? You correctly answered: autorhythmicity. 2 Phase 2 of the cardiac action potential, when the calcium channels remain open and potassium channels are closed, is called the You correctly answered: plateau phase. 3 Which of the following is true of the cardiac action potential? You correctly answered: The cardiac action potential is longer than the skeletal muscle action potential. 4 The main anatomical difference between the frog heart and the human heart is that the frog heart has You correctly answered: a single, fused ventricle. Experiment Results Predict Questions 1 Predict Question 1: When you increase the frequency of the stimulation, what do you think will happen to the amplitude (height) of the ventricular systole wave? Your answer: The amplitude will increase. 2 Predict Question 2: If you deliver multiple stimuli (20 stimuli per second) to the heart, what do you think will happen? Your answer: neither wave summation nor tetanus

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Institution
Central Arizona College
Course
BIO 202 (BIO202)

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2/20/26, 11:45 AM PhysioEx Exercise 6 Activity 1



PhysioEx Lab Report
Exercise 6: Cardiovascular Physiology
Activity 1: Investigating the Refractory Period of Cardiac Muscle
Name: Morris
Date: 20 February 2026
Session ID:

Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.

1 The cardiac muscle is capable of which of the following?

You correctly answered: autorhythmicity.

2 Phase 2 of the cardiac action potential, when the calcium channels remain open and
potassium channels are closed, is called the

You correctly answered: plateau phase.

3 Which of the following is true of the cardiac action potential?

You correctly answered: The cardiac action potential is longer than the skeletal muscle
action potential.

4 The main anatomical difference between the frog heart and the human heart is that the frog
heart has

You correctly answered: a single, fused ventricle.


Experiment Results
Predict Questions
1 Predict Question 1: When you increase the frequency of the stimulation, what do you think
will happen to the amplitude (height) of the ventricular systole wave?

Your answer: The amplitude will increase.

2 Predict Question 2: If you deliver multiple stimuli (20 stimuli per second) to the heart, what
do you think will happen?

Your answer: neither wave summation nor tetanus.

Stop & Think Questions

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Institution
Central Arizona College
Course
BIO 202 (BIO202)

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Uploaded on
February 24, 2026
Number of pages
3
Written in
2025/2026
Type
Exam (elaborations)
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Questions & answers

Subjects

  • autorhythmicity
  • exercise 6 cardiovascular physiology
  • activity 1 investigating the refractory period of
  • the cardiac muscle is capable of which of the foll
  • phase 2 of the cardiac action potential when t
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