NPA Anatomy & Physiology of the Circulatory System 1 — Questions and Answers
Question 1: Which vein is most commonly preferred as the first choice for routine venipuncture in the antecubital area?
- Basilic vein
- Median cubital vein (Correct answer)
- Cephalic vein
- Median antebrachial vein
Correct answer: Median cubital vein
The median cubital vein is the preferred first choice for venipuncture because it is large, well-anchored, and less likely to roll or bruise.
Question 2: Which chamber of the heart pumps deoxygenated blood to the lungs via the pulmonary artery?
- Left ventricle
- Left atrium
- Right atrium
- Right ventricle (Correct answer)
Correct answer: Right ventricle
The right ventricle pumps deoxygenated blood through the pulmonary artery to the lungs for oxygenation.
Question 3: What is the primary function of valves found in veins?
- Regulate blood pressure
- Prevent backflow of blood (Correct answer)
- Increase blood flow velocity
- Filter cellular waste products
Correct answer: Prevent backflow of blood
Venous valves prevent the backflow of blood, helping it return to the heart against gravity.
Question 4: Which layer of a blood vessel wall contains smooth muscle cells and is responsible for vasoconstriction and vasodilation?
- Tunica intima
- Tunica externa
- Tunica media (Correct answer)
- Endothelium
Correct answer: Tunica media
The tunica media is the middle layer of blood vessels, composed of smooth muscle that controls vessel diameter through contraction and relaxation.
Question 5: What is the antecubital fossa?
- The inner wrist area near the radial artery
- The triangular area on the inner aspect of the elbow (Correct answer)
- The space between the cephalic and basilic veins on the forearm
- The area on the dorsal side of the hand
Correct answer: The triangular area on the inner aspect of the elbow
The antecubital fossa is the triangular depression located on the anterior (inner) aspect of the elbow, which is the primary site for venipuncture.
Question 6: Which type of blood vessel is responsible for the exchange of oxygen, nutrients, and waste products between blood and tissues?
- Arteries
- Veins
- Capillaries (Correct answer)
- Venules
Correct answer: Capillaries
Capillaries are the smallest blood vessels and the site of gas, nutrient, and waste exchange between blood and surrounding tissues.
Question 7: The largest artery in the human body is the:
- Femoral artery
- Pulmonary artery
- Carotid artery
- Aorta (Correct answer)
Correct answer: Aorta
The aorta is the largest artery in the body, arising directly from the left ventricle and distributing oxygenated blood to the systemic circulation.
NPA Anatomy & Physiology of the Circulatory System 1
Which vein is most commonly preferred as the first choice for routine venipuncture in the antecubital area?