Cardiovascular System Activity
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Georgia Military College Valdosta Campus *
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Course
202
Subject
Medicine
Date
Apr 3, 2024
Type
docx
Pages
6
Uploaded by GrandSteel1488
1-Which of the following is true for ventricular diastole?
A)
The ventricles contract.
B) Myocardial perfusion occurs during this period
C) Represented as the P wave in the ECG
D) All the above statements are not true
2-The ventricles begin to fill during ventricular diastole.
a)
True
b) False
3-The atria never need to contract due to passive ventricular filling.
a)
True b) False
4-Which of the following is the highest pressure exerted by the blood as it travels through arteries?
a)
Systolic
b)
Diastolic
5- Put in order the sequence for the spreading of the electrical signal (action potential) through the heart:
__1
___SA Node ___2
___AV node __4
___Purjinke Fibers __3
__AV Bundle
6- Consider the following scenario:
Carly is a sedentary 20-year-old female with a resting heart rate of 70 bpm. This afternoon, when she is done working for the day, she puts on running shoes and goes for a 30 min jog. Right after she stops, she immediately checks her heart rate (135 bpm) and realizes she is drench in sweat. a)
During the exercise, which parts of the body was receiving the most blood flow? Which areas had a decrease in blood flow? The most blood flow goes to the skin and leg muscles.
The GI tract, kidneys, and brain has the largest decrease in blood flow.
b) What factors caused the increase in heart rate during exercise?
Extrinsic Neural Control
c) What is Carly’s heart rate max?
135 BPM or 194 BPM
d) What happens to her blood pressure during the exercise?
Blood Pressure Increased
e) What happens to her cardiac output during exercise?
Cardiac Output Increased, because of stroke value and heart rate
7- Select the best parameter to match each explanation.
Cardiac Output - 3
Blood Pressure - 4
Blood Flow - 5
Stroke Volume - 2
Heart rate - 1
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8- Select the best answer for the question
Amber is a swimmer on her high school swim team. Her specialty is the 500-yd freestyle. After a long drive, her team finally arrived at an away meet, and Amber was very hungry. She and a few friends found a fast food place, and Amber downed a burger, fries, and a shake 30 to 45 min before her event. She figured that the food would give her energy to compete. To her surprise, she finished a
distant sixth, instead of her usual top-three finish. Which of the following explains Amber’s sixth-place finish? a.
Reduced gravity in the water caused blood to pool in Amber's legs, reducing the volume of blood returning to her heart.
b.
Blood was diverted to Amber's gastrointestinal system to aid digestion and absorption of her lunch. Less blood was available to supply oxygen to Amber's muscles during this endurance.
c.
The Valsalva maneuver that occurred each time Amber did a flip turn caused an increase in intrathoracic pressure and a reduction in venous return.
d.
The supine position reduced Amber's cardiac output and lowered her skin blood flow, resulting in less oxygen transport to her muscles and a higher core temperature that caused premature fatigue.
e.
More blood was directed to Amber's skin prior to her event. Therefore, less blood was left for
her muscles, thereby hindering performance.
9- Select the best answer for the question
Brandon is a 25-year-old recreational long-distance runner. He competes regularly, mostly for the fun
of it and to keep himself motivated to train. Today he ran 10K in 35 °C (95 °F) heat. His time was unusually slow. Which of the following explains Brandon’s unusually slow time? a.
Gravity caused blood to pool in the legs, reducing the volume of blood returning to the heart. Heart rate responds by increasing to maintain cardiac output.
b.
Blood was diverted to the system that was placing a high demand. Less blood was available to supply oxygen to muscles during this long-distance event.
c.
Use of the Valsalva maneuver causes enormous increase in intrathoracic pressure. Subsequent blood pressure increase occurs because of body’s effort to overcome high internal pressure.
d.
Blood does not pool in the lower extremity in a supine position, allowing for easy blood flow return to the heart and resulting in a higher stroke volume. Performing upright exercise, stroke volume must increase to compensate for the force of gravity.
e.
More blood is directed to the skin. Less blood was left for muscles, thereby hindering performance.
10- Select the best answer for the question
Ben is a competitive weightlifter at his university. He is studying exercise physiology and asked a med student to take his blood pressure immediately after performing the clean and jerk at 80% of his 1RM. Ben was shocked when the blood pressure reading was 250/120. Which of the following explains Ben’s blood pressure reading? a.
Gravity caused blood to pool in the legs, reducing the volume of blood returning to the heart. Heart rate responds by increasing to maintain cardiac output.
b.
Blood was diverted to the system that was placing a high demand. Less blood was available to supply oxygen to muscles during this long-distance event.
c.
Use of the Valsalva maneuver causes enormous increase in intrathoracic pressure. Subsequent blood pressure increase occurs because of the body’s effort to overcome high internal pressure.
d.
Blood does not pool in the lower extremity in a supine position, allowing for easy blood flow return to the heart and resulting in a higher stroke volume. Performing upright exercise, stroke volume must increase to compensate for the force of gravity.
e.
More blood is directed to the skin. Less blood was left for muscles, thereby hindering performance.
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