Circulatory System

What is the primary reason for regulating blood pressure in the circulatory system?

• To prevent blood clotting in the vessels

• To maintain constant body tempeture

• To ensure adequate blood flow and nutrient deliver throughout the body.

• To increase heart rate during exercise.

White blood cells are also known as:

• Plasma

• Platelets

• Leukocytes

• Erythrocytes

What are the three primary ways the circulatory system contributes to homeostasis?

• Filtering waste, producing blood cells, and regulating blood pressure.

• Regulating body temperature, balancing pH and electrolytes, and maintaining fluid levels.

• Transporting oxygen, removing carbon dioxide, and producing hormones.

• Transporting nutrients, synthesizing proteins, and regulating heart rate.

What substances does blood transport in the circulatory system?

• Nutrients and hormones only

• Only oxygen and carbon dioxide

• Oxygen, carbon dioxide, hormones, nutrients, and waste products

• Waste products and glucose

What is the primary function of the atrioventricular valves in the heart?

• Facilitate blood flow from the ventricles to the arteries

• Regulate blood pressure in the heart

• Prevent back flow of blood between the atria and ventricles during contraction

• Control the heart rate

What are the two main functions of the circulatory system?

• Transport materials to maintain homeostasis

• Digest food and eliminate waste

• Support immune function and store nutrients

• Produce hormones and regulate temperature

How many chambers does the heart have, and what are they called?

• Two chambers: one atrium and one ventricle

• Four chambers: two atria and two ventricles

• Five chambers: three atria and two ventricle

• Three chambers: one atrium and two ventricle

What is the approximate percentage of blood volume that plasma constitutes?

• 45%

• 55%

• 60%

• 50%

What is the primary role of albumin in the blood?

• Clots blood

• Fights infection

• Transport oxygen

• Maintains osmotic pressure

Describe the significance of measuring the electrical activity of the heart through an ECG.

• measuring the electrical activity of the heart through an ECG is significant because it helps assess the heart's rhythm and function.

• The ECG provides information about the hearts size and shape.

• An ECG is used to measure blood pressure directly.

• ECG readings are primarily used to analyze blood flow in vessels.