Vascular System Quiz

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15 Questions

Which blood vessels carry blood from the heart to the tissues?

Arteries

What are arterioles?

Small arteries that connect to capillaries

What is the role of capillaries in the circulatory system?

To exchange substances between the blood and body tissues

What do venules connect?

Capillaries to veins

What is the role of veins in the circulatory system?

To convey blood from the tissues back to the heart

Which of the following is the primary function of capillaries?

To exchange nutrients and wastes between the blood and tissue cells

Which of the following is true about capillary walls?

They are composed of only a single layer of cells

What is the most important method of capillary exchange?

Simple diffusion

What is the role of venules in the cardiovascular system?

To drain blood from the capillaries into the veins

What is the role of valves in veins?

To prevent the backflow of blood

Which hormone(s) can affect blood pressure and blood flow by altering cardiac output, changing systemic vascular resistance, or adjusting the total blood volume?

Angiotensin II

What is autoregulation?

The ability of a tissue to automatically adjust its own blood flow to match its metabolic demand for a supply of O2 and nutrients and the removal of wastes

Which artery is most commonly used to feel the pulse?

Radial artery

What is the normal resting pulse (heart) rate?

70 to 80 beats per minute

What is the normal blood pressure of a young adult male?

120/80 mm Hg

Study Notes

Blood Vessels and Circulation

  • Arteries carry blood from the heart to the tissues.
  • Arterioles are small arteries that branch off from larger arteries and lead to capillaries.
  • Capillaries play a crucial role in the circulatory system by allowing oxygen and nutrients to diffuse from the blood into the tissues and waste products to diffuse from the tissues into the blood.

Venules and Veins

  • Venules connect capillaries to larger veins.
  • Veins are responsible for carrying blood back to the heart from the tissues.

Capillary Function

  • The primary function of capillaries is to facilitate the exchange of oxygen, nutrients, and waste products between the blood and tissues.
  • Capillary walls are thin and permeable, allowing for the diffusion of substances across the capillary wall.
  • The most important method of capillary exchange is diffusion.

Venules and Veins

  • Venules play a crucial role in the cardiovascular system by returning blood from capillaries to the heart.
  • Valves in veins prevent backflow and ensure that blood flows in one direction, towards the heart.

Blood Pressure Regulation

  • Hormones such as epinephrine, norepinephrine, and vasopressin can affect blood pressure and blood flow by altering cardiac output, changing systemic vascular resistance, or adjusting the total blood volume.
  • Autoregulation is the ability of tissues to regulate their own blood flow despite changes in blood pressure.

Pulse and Blood Pressure

  • The radial artery is most commonly used to feel the pulse.
  • The normal resting pulse (heart) rate is 70-80 beats per minute.
  • The normal blood pressure of a young adult male is approximately 120/80 mmHg.

Test your knowledge on the roles of arteries, arterioles, and capillaries in the circulatory system. Learn how these blood vessels function to transport oxygen and nutrients to the tissues and remove waste products.

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