30 Questions
Which phase of the cardiac cycle is characterized by the heart cells being at rest and the ventricles filling up with blood?
Diastole
What is the equation for stroke volume (SV)?
SV = EDV - ESV
Which factor affects stroke volume by representing the degree of stretching experienced by the heart muscle cell during diastole?
Preload
What happens to end-diastolic volume (EDV) and end-systolic volume (ESV) when you start exercising?
EDV rises, ESV drops
What is the average stroke volume (SV) per beat?
About 70 mL
Which factor affects the amount of blood returning to the heart and is influenced by gravity?
Venous return
What happens to stroke volume (SV) when the end-diastolic volume (EDV) increases and the end-systolic volume (ESV) decreases?
Stroke volume increases
Which of the following factors causes an increase in stroke volume during exercise?
Venous return
What is the equation for calculating ejection fraction?
SV/EDV
Which of the following is responsible for increasing heart rate during exercise?
Sympathetic nervous system
What is the equation for calculating cardiac output (Q)?
Q = SV x HR
Which of the following is true about systolic blood pressure (SBP) during exercise?
It increases
What is the equation for calculating mean arterial pressure (MAP)?
MAP = ⅓ SBP + ⅔ DBP
What is the pulse pressure if the systolic blood pressure (SBP) is 120 mmHg and the diastolic blood pressure (DBP) is 80 mmHg?
93.3 mmHg
According to Poiseuille's Law, which of the following factors does NOT influence blood flow rate?
Length of tubing
Which of the following statements about vasodilation is correct?
Vasodilation is influenced by hormones, metabolites, and shear stress
What is the relationship between flow, pressure, and resistance according to the equation Q = \frac{P},{R}?
Flow is directly proportional to pressure and inversely proportional to resistance
Which of the following factors does NOT affect blood flow distribution?
Blood pressure
What is the relationship between viscosity, shear stress, and shear rate according to the equation \eta = \frac{\tau},{\dot{\gamma}}?
Viscosity is directly proportional to shear stress and inversely proportional to shear rate
During static exercise, which of the following factors does NOT contribute to decreased stroke volume?
Pressor response
Which of the following statements about blood flow distribution is correct?
The skeletal muscles receive the highest percentage of blood flow during maximal aerobic exercise
Which type of exercise, static or dynamic, is associated with a greater increase in heart rate?
Dynamic
During dynamic exercise, why is there not much increase in blood flow until the muscle relaxes?
Because the blood vessels are occluded
Which gender has higher cardiac output (Q) and heart rate (HR), but lower stroke volume (SV) at the same absolute work rate?
Females
Which gender has a smaller heart size, males or females?
Females
Which parameter is higher in males: red blood cell (RBC) count or hematocrit (Hb)?
Red blood cell (RBC) count
In aging individuals, which parameter tends to be smaller and which tends to be higher at the same absolute heart rate (HR): stroke volume (SV) and heart rate (HR)?
SV smaller, HR higher
In older individuals, is resting blood pressure (BP) higher or lower compared to younger individuals?
Higher
In older individuals, is exercise blood pressure (BP) higher or lower compared to younger individuals?
Higher
Which type of exercise, static or dynamic, allows a bigger volume of blood to be pumped around the body?
Dynamic
Test your knowledge of the relationship between pressure, flow, and resistance in blood vessels with this quiz. Explore concepts such as Poiseuille's Law and the influence of vessel diameter on flow. Learn how changes in pressure and resistance affect blood flow in the body.
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