37 Questions
Which of the following factors can cause an increase in cardiac output?
Increased heart rate
What is the immediate role of baroreceptors in regulating blood pressure?
They sense changes in blood pressure and initiate afferent signaling to the brain
Which part of the nervous system is responsible for slowing down heart rate?
Parasympathetic nervous system
Which part of the nervous system is responsible for increasing heart rate?
Sympathetic nervous system
What is the primary role of the brainstem in regulating cardiac output?
Processing afferent and CNS input into efferent output
Which of the following is tonically active?
Baroreceptors
What is the primary role of the baroreflex in maintaining homeostasis of mean arterial pressure (MAP)?
Initiating a complex series of actions
Which of the following is responsible for regulating vascular resistance?
Blood vessels
Which of the following is sensed by baroreceptors to regulate blood pressure?
Mean arterial pressure
What is the primary role of the vagus nerve in regulating heart rate?
Slowing down heart rate
Which of the following is the correct equation for mean arterial blood pressure (MAP)?
MAP = CO X TPR
What determines the blood flow in the systemic circulation?
Mean arterial pressure
What is the role of total peripheral resistance (TPR) in arterial pressure?
TPR raises arterial pressure
What determines the cardiac output?
Stroke volume and heart rate
What is stroke volume?
The amount of blood pumped out by the left ventricle in one beat
What is heart rate?
The number of heartbeats in one minute
What tends to be the case for small animals in terms of stroke volume and heart rate?
Small animals have smaller stroke volume and faster heart rate
What is the driving force for blood flow in the systemic circulation?
Mean arterial blood pressure (MAP)
Cardiac output is solely determined by changes in heart rate.
False
An increase in oxygen demand during exercise leads to an increase in stroke volume.
True
Mean arterial blood pressure (MAP) is regulated by both the heart and blood vessels.
True
Baroreceptors in the periphery sense changes in blood pressure.
True
The brainstem integrates input from the baroreceptors and CNS to regulate cardiac output.
True
Parasympathetic signaling through the vagus nerve increases heart rate.
False
Sympathetic signaling through the sympathetic trunk ganglion increases stroke volume.
True
Small animals tend to have higher stroke volume and lower heart rate.
False
Total peripheral resistance (TPR) plays a role in regulating arterial pressure.
True
The baroreflex is responsible for maintaining homeostasis of mean arterial pressure (MAP).
True
True or false: The left ventricle generates pressure for the pulmonary circulation.
False
True or false: High pressure in the large systemic arteries is linked to ventricular relaxation.
False
True or false: The mean arterial blood pressure (MAP) is equal to cardiac output divided by total peripheral resistance.
False
True or false: Blood pressure in major arteries does not oscillate.
False
True or false: The driving force for blood flow is determined by the absolute pressure.
False
True or false: Arterial pressure is determined by cardiac output multiplied by total peripheral resistance.
True
True or false: Blood inflow into arteries increases arterial blood volume and lowers arterial pressure.
False
True or false: Total peripheral resistance is determined by capillary flow and resistance of arteries.
True
True or false: Cardiac output is determined by stroke volume and heart rate.
True
Test your knowledge on the relationship between left ventricular pressure, arterial blood pressure, and blood flow in the systemic circulation with this quiz. Explore concepts such as pulsatile flow, mean arterial blood pressure (MAP), and how blood pressure affects overall blood flow.
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