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Questions and Answers
What is the main function of the tunica media in arteries?
What is the main function of the tunica media in arteries?
- Allow low-resistance conduction of blood
- Control flow into capillary beds
- Smooth out blood pressure fluctuations
- Active in vasoconstriction (correct)
Which type of artery contains more smooth muscle and less elastic tissue?
Which type of artery contains more smooth muscle and less elastic tissue?
- Muscular arteries (correct)
- Veins
- Arterioles
- Elastic arteries
What is the function of arterioles in the circulatory system?
What is the function of arterioles in the circulatory system?
- Deliver blood to body organs
- Lead to major branches near the heart
- Smooth out blood pressure fluctuations
- Control blood flow into capillary beds (correct)
Which type of capillaries allow only a single red blood cell to pass at a time?
Which type of capillaries allow only a single red blood cell to pass at a time?
Where can you find pericytes in capillaries?
Where can you find pericytes in capillaries?
Which arteries have large lumens that allow low-resistance conduction of blood?
Which arteries have large lumens that allow low-resistance conduction of blood?
Which layer of blood vessels is composed of smooth muscle and elastic fibers that are regulated by the sympathetic nervous system?
Which layer of blood vessels is composed of smooth muscle and elastic fibers that are regulated by the sympathetic nervous system?
What is the main function of the tunica externa in blood vessels?
What is the main function of the tunica externa in blood vessels?
Which type of arteries carries blood away from the heart to all parts of the body except the lungs?
Which type of arteries carries blood away from the heart to all parts of the body except the lungs?
The structure of capillaries mainly consists of which of the following?
The structure of capillaries mainly consists of which of the following?
Which layer of blood vessels is responsible for synthesizing blood cells?
Which layer of blood vessels is responsible for synthesizing blood cells?
Which type of artery carries blood from the heart to the lungs for oxygenation?
Which type of artery carries blood from the heart to the lungs for oxygenation?
What is a key characteristic of continuous capillaries found in the skin and muscles?
What is a key characteristic of continuous capillaries found in the skin and muscles?
Where are fenestrated capillaries most commonly found in the body?
Where are fenestrated capillaries most commonly found in the body?
What is the primary function of sinusoids in the body?
What is the primary function of sinusoids in the body?
Which structure regulates blood flow into true capillaries in a capillary bed?
Which structure regulates blood flow into true capillaries in a capillary bed?
How are venules different from postcapillary venules?
How are venules different from postcapillary venules?
What distinguishes continuous capillaries of the brain from those in the skin and muscles?
What distinguishes continuous capillaries of the brain from those in the skin and muscles?
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