ASCP Domain 1: Circulatory System Welcome to your ASCP Domain 1: Circulatory System 1. ASCP: Circulatory System What is the primary function of the tunica media layer in blood vessels? A. Provides a barrier to control the diffusion of substances B. Facilitates the exchange of nutrients and waste products C. Regulates blood vessel diameter and blood flow D. Anchors the vessel to surrounding structures None 2. ASCP: Circulatory System In the context of the circulatory system, which of the following best describes the function of baroreceptors? A. Detect changes in the chemical composition of blood B. Monitor the oxygen level in the blood C. Sense changes in blood pressure D. Regulate the heart rate None 3. ASCP: Circulatory System The opening and closing of the heart valves are primarily regulated by: A. Hormonal signals from the endocrine system B. The autonomic nervous system C. Changes in blood pressure within the heart chambers D. Electrical impulses from the sinoatrial node None 4. ASCP: Circulatory System Which artery supplies oxygenated blood to the myocardium? A. Pulmonary artery B. Aorta C. Coronary artery D. Carotid artery None 5. ASCP: Circulatory System During the cardiac cycle, the term "diastole" refers to: A. The contraction phase of the heart B. The relaxation phase of the heart C. The period when the semilunar valves are open D. The phase when the atrioventricular valves are closed None 6. ASCP: Circulatory System The Frank-Starling law of the heart describes the relationship between: A. Heart rate and arterial pressure B. Stroke volume and myocardial contractility C. Ventricular filling and stroke volume D. Blood viscosity and resistance None 7. ASCP: Circulatory System Which of the following blood vessels carries deoxygenated blood? A. Pulmonary veins B. Aorta C. Coronary arteries D. Pulmonary arteries None 8. ASCP: Circulatory System The process by which nutrients and gases pass through the capillary walls is known as: A. Osmosis B. Active transport C. Diffusion D. Filtration None 9. ASCP: Circulatory System Which of the following factors would increase peripheral resistance in blood vessels? A. Decreased blood viscosity B. Vasodilation C. Decreased length of the blood vessel D. Vasoconstriction None 10. ASCP: Circulatory System The primary pacemaker of the heart, responsible for setting the rhythm of cardiac contractions, is the: A. Atrioventricular node B. Sinoatrial node C. Bundle of His D. Purkinje fibers None 1 out of 10 Time is Up! Time's up
