27 Questions
What does the '120' in a blood pressure of 120/80 refer to?
Systolic pressure
Which structures would be subject to the lowest blood pressure?
Vena cava
Why is it advantageous to have blood move slowly in the capillaries?
It provides time for substances to be exchanged between blood and tissue fluids
A waitress standing for hours and crossing her legs may increase the chances of having blood accumulate in her:
Veins
Which blood vessels have the thickest muscular layer?
Arteries
What is the main function of capillaries in the circulatory system?
Exchanging oxygen and nutrients with tissues
Which layer of blood vessels helps in the regulation of blood pressure?
Tunica media
In what part of the heart does the process of red blood cell formation occur?
Myocardium
Which heart valve is responsible for preventing backflow from the aorta?
Aortic valve
Which condition is characterized by the presence of an opening in the atrial septum?
Atrial septal defect
What is the role of the AV node in response to lower levels of oxygen?
Sends faster signals to the SA node
During the administration of a strong current by a paramedic with paddles, what is the primary objective?
Restart ventricular contractions that have completely stopped
In a hypothetical experiment where blood flow is shared between two dogs, if one dog is stressed causing a rapid increase in heart rate, what happens to the heart rate of the second dog?
Increases due to sympathetic stimulation via the blood
What is the term for abnormal, dilated blood vessels that occur due to weakening in the blood vessel wall valve?
Phlebitis
What effect does the hormone epinephrine have on the heartbeat?
Inhibits the heartbeat
What role does the brain play in relation to the heartbeat?
Stimulates or depresses heart rate based on activity and stress
In which association is the pairing NOT correct?
Albumin - fights infection
Why does the SA node send faster signals to the AV node when detecting lower levels of oxygen?
To ensure ventricles don't contract uncontrollably so the SA node can reestablish coordinated beat
Which of the following substances would NOT typically be found in the blood?
Glycogen
For 'artificial red blood cells' to be effective and safe, which property would be important?
Would bind to iron molecules and other artificial blood units
Which statement about hemoglobin is NOT true?
Normally found free in the plasma
What determines whether an artery or vein is defined as such?
Whether they leave or enter the heart
If arteries and veins were defined by oxygenation status, which pair would need to be switched?
Pulmonary artery and vein
Which phenomenon is described in the text when pressing your thumb against the thick portion of your hand?
Temporary color change without depression
What is the most likely explanation for the thumbprint leaving an indented area on swollen feet?
Fluid accumulation in tissues from capillary pressure
What effect does pressing the skin have on blood vessels based on the text?
Forces blood into surface capillaries
Why does the thumbprint leave no depression upon removal according to the text?
Quick return of blood to capillaries
Test your knowledge on the different types of blood vessels and their roles in the cardiovascular system. Identify which vessels carry blood away from the heart, understand the structure and functions of arteries, veins, capillaries, and more.
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