Right Atrium Function

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What is the primary function of the right atrium in the heart?

To pump oxygenated blood to the lungs

To receive deoxygenated blood from the body (correct)

To regulate blood pressure

To filter waste from the blood

What is the characteristic of the blood that is returned to the right atrium?

Poor in oxygen (correct)

Rich in oxygen

Low in carbon dioxide

High in carbon dioxide

Where is the blood pumped to after it leaves the right ventricle?

The inferior vena cava

The superior vena cava

The aorta

The pulmonary artery (correct)

What is the primary purpose of the blood being pumped to the lungs?

To re-oxygenate and remove carbon dioxide (B) Signup and view all the answers

What is the direction of blood flow in the heart, in relation to the right atrium and ventricle?

From atrium to ventricle to lungs (B) Signup and view all the answers

What type of capillaries are primarily found in skeletal muscles, finger, gonads, and skin?

Continuous capillaries (C) Signup and view all the answers

What is the approximate diameter of fenestrations in endothelial cells?

60-80 nm (C) Signup and view all the answers

What can pass through the fenestrations in fenestrated capillaries?

Small molecules and limited amounts of protein (A) Signup and view all the answers

What is the function of fenestrations in fenestrated capillaries?

To allow components to bypass endothelial cells (C) Signup and view all the answers

What is the term for the small openings in endothelial cells?

Fenestrations (B) Signup and view all the answers

What is the primary function of the size of muscular arteries?

To differentiate them from elastic arteries (A) Signup and view all the answers

In which layer of the artery is the internal elastic layer (IEL) located?

Between the tunica intima and tunica media (A) Signup and view all the answers

What is characteristic of the elastin sheet in muscular arteries compared to elastic arteries?

It is thinner and more reduced (C) Signup and view all the answers

What is the primary function of the internal elastic layer (IEL) in muscular arteries?

The function is not specified in the text (C) Signup and view all the answers

Which of the following is a characteristic unique to elastic arteries?

A thicker sheet of elastin (A) Signup and view all the answers

What type of tissue surrounds the blood vessels and nerves that supply the heart?

Adipose tissue (D) Signup and view all the answers

What is the primary function of the adipose tissue in the pericardial cavity?

To cushion the heart and reduce friction (C) Signup and view all the answers

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 (B) Signup and view all the answers

What is the purpose of the pericardial cavity?

To reduce friction between the heart and the surrounding tissues (D) Signup and view all the answers

What is the relationship between the blood vessels and nerves that supply the heart and the epicardium?

They are surrounded by the epicardium (A) Signup and view all the answers

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 (B) Signup and view all the answers

Which of the following features of capillaries facilitates the exchange of substances between the blood and tissues?

Large diameter and thin walls (C) Signup and view all the answers

What is the classification of capillaries based on the features of the endothelium and the basal lamina?

Continuous, fenestrated, and sinusoidal (C) Signup and view all the answers

Which type of capillary has a fenestrated endothelium, allowing for rapid exchange of molecules?

Fenestrated capillaries (C) Signup and view all the answers

What is the main function of the basal lamina in capillaries?

To provide structural support (A) Signup and view all the answers