Blood Vessels and Circulation System Quiz

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What is the order of blood flow starting from the aorta?

Venules, capillaries, veins

Arterioles, capillaries, venules

Arteries, arterioles, capillaries (correct)

Veins, arteries, arterioles

Why do arteries and arterioles have thicker walls compared to veins?

To allow for easier blood flow

To create more space for blood

Due to higher pressure from pumped blood (correct)

To lower the blood pressure

What are vasa vasorum responsible for?

Stopping backflow in veins

Stopping backflow in arteries

Supplying nutrients to large blood vessels (correct)

Supplying nutrients to small blood vessels

What is the function of nervi vasorum?

Control contraction and dilation of blood vessels (A) Signup and view all the answers

Which layer of a blood vessel contains muscles for vasoconstriction and vasodilation?

Tunica media (A) Signup and view all the answers

What is the function of the external elastic membrane in blood vessels?

Separates tunica media from tunica externa (C) Signup and view all the answers

What is the main factor that affects blood pressure the quickest and most noticeably?

Vessel diameter (B) Signup and view all the answers

Where in the circulatory system is the most noticeable slowdown of blood flow?

At the artery to arteriole junction (D) Signup and view all the answers

Which hormone is released by the kidneys in response to decreased blood volume and signals water reabsorption to maintain fluid volume and blood pressure?

Antidiuretic Hormone (ADH) (C) Signup and view all the answers

What molecule is responsible for allowing fluid to move from tissues to capillaries due to osmotic pressure?

Dissolved molecules (A) Signup and view all the answers

What happens during filtration in the capillaries?

Molecules move from high pressure in capillaries to low pressure in tissue (D) Signup and view all the answers

What regulates vascular homeostasis through control of vascular tone in the tunica media?

The nervous system via sympathetic and parasympathetic control (A) Signup and view all the answers

What is the function of the precapillary sphincters?

Allowing blood flow into capillaries (C) Signup and view all the answers

What hormone stimulates hematopoiesis, leading to an increase in blood volume, viscosity, and pressure?

Erythropoietin (EPO) (A) Signup and view all the answers

Which type of capillary is associated with being part of the blood-brain barrier?

Continuous capillary (B) Signup and view all the answers

What is the main cause of hypovolemic shock?

Dehydration (B) Signup and view all the answers

What is the primary function of veins in the circulatory system?

Preventing backflow of blood (C) Signup and view all the answers

Which pump function helps counteract gravity and improve blood flow especially in the legs?

Skeletal muscle pump (B) Signup and view all the answers

What is the main difference between elastic arteries and muscular arteries?

Elastic arteries are found nearer the heart (D) Signup and view all the answers

Which enzyme converts angiotensin 1 into angiotensin 2?

ACE (B) Signup and view all the answers

Which measure is an indicator of ventricular contraction in the cardiovascular system?

Systolic blood pressure (B) Signup and view all the answers

What is the term for a condition characterized by insufficient blood flow and often accompanied by hypoxia?

Ischemia (D) Signup and view all the answers

What is the function of the metarteriole in the circulatory system?

Regulating blood flow to capillary beds (B) Signup and view all the answers

Which factor has a direct impact on vascular resistance in the circulatory system?

Blood viscosity (C) Signup and view all the answers

What is the formula to calculate Mean Arterial Pressure (MAP)?

MAP = Systolic BP + Pulse Pressure / 3 (A) Signup and view all the answers

What is the role of compliance in maintaining normal blood pressure?

Compliance helps expand compartments due to increases in amount (A) Signup and view all the answers