Cardiovascular Dynamics Quiz (L6)

What is the primary focus of cardiovascular dynamics?

• Heart rate

• Blood flow and its influencing factors

• Muscle contraction

• Nervous system

What does the term "blood viscosity" refer to in cardiovascular dynamics?

• The length of the blood vessel

• The thickness and stickiness of blood

• The heart rate

• The blood pressure

What does the term "systolic volume" refer to?

• Blood volume remaining in the heart after contraction

• Blood volume ejected from the heart

• Total blood volume in the body

• Blood volume in the veins

What type of relationship is observed between viscosity and blood flow rate?

• Linear

• Exponential

• Inverse exponential

• Quadratic

What effect does an increase in blood vessel length have on blood flow rate?

• Increases flow rate

• Decreases flow rate

• No effect

• Causes fluctuations

What happens to blood flow when the diameter of the blood vessel increases?

• It decreases

• It remains constant

• It increases

• It fluctuates

What happens to blood flow when the number of strokes per minute increases?

• It decreases

• It remains constant

• It increases

• It fluctuates

Tags

NGSS.HS-LS1-3

What condition increases the afterload in the heart?

• Aortic valve stenosis

• Mitral valve prolapse

• Pulmonary embolism

• Hypertension

What role do ions like calcium, potassium, and sodium play in the heart?

• They increase blood pressure

• They affect heart contractions

• They decrease heart rate

• They increase heart rate

What is the function of Purkinje fibers in the heart?

• Initiate rhythmic contraction

• Increase blood pressure

• Decrease heart rate

• Increase heart rate