25 Questions
What is the primary function of the right atrium in the heart?
To receive deoxygenated blood from the body
What is the characteristic of the blood that is returned to the right atrium?
Poor in oxygen
Where is the blood pumped to after it leaves the right ventricle?
The pulmonary artery
What is the primary purpose of the blood being pumped to the lungs?
To re-oxygenate and remove carbon dioxide
What is the direction of blood flow in the heart, in relation to the right atrium and ventricle?
From atrium to ventricle to lungs
What type of capillaries are primarily found in skeletal muscles, finger, gonads, and skin?
Continuous capillaries
What is the approximate diameter of fenestrations in endothelial cells?
60-80 nm
What can pass through the fenestrations in fenestrated capillaries?
Small molecules and limited amounts of protein
What is the function of fenestrations in fenestrated capillaries?
To allow components to bypass endothelial cells
What is the term for the small openings in endothelial cells?
Fenestrations
What is the primary function of the size of muscular arteries?
To differentiate them from elastic arteries
In which layer of the artery is the internal elastic layer (IEL) located?
Between the tunica intima and tunica media
What is characteristic of the elastin sheet in muscular arteries compared to elastic arteries?
It is thinner and more reduced
What is the primary function of the internal elastic layer (IEL) in muscular arteries?
The function is not specified in the text
Which of the following is a characteristic unique to elastic arteries?
A thicker sheet of elastin
What type of tissue surrounds the blood vessels and nerves that supply the heart?
Adipose tissue
What is the primary function of the adipose tissue in the pericardial cavity?
To cushion the heart and reduce friction
Which of the following statements about the epicardium is TRUE?
It is a region where the blood vessels and nerves that supply the heart are located
What is the purpose of the pericardial cavity?
To reduce friction between the heart and the surrounding tissues
What is the relationship between the blood vessels and nerves that supply the heart and the epicardium?
They are surrounded by the epicardium
What is the primary function of capillaries that allows for the exchange of oxygen, nutrients, and waste products between the blood and tissues?
Facilitation of diffusion and ultrafiltration
Which of the following features of capillaries facilitates the exchange of substances between the blood and tissues?
Large diameter and thin walls
What is the classification of capillaries based on the features of the endothelium and the basal lamina?
Continuous, fenestrated, and sinusoidal
Which type of capillary has a fenestrated endothelium, allowing for rapid exchange of molecules?
Fenestrated capillaries
What is the main function of the basal lamina in capillaries?
To provide structural support
Learn about the right atrium's role in the heart's circulation process, including receiving deoxygenated blood and pumping it to the lungs for re-oxygenation.
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