09:30Blood Vessels, Part 1 - Form and Function: Crash Course Anatomy & Physiology #27CrashCourse383views6rank
04:59Blood Vessels: Structures and Functions – Physiology | Lecturio NursingLecturio Nursing225views4rank
06:22Structure of Blood Vessels | Layers of the Vessel Wall | Blood Vessel HistologyByte Size Med216views3rank
Multiple ChoiceThe vessel layer that has a direct role in vasoconstriction is the __________.1068views4rank
Multiple ChoiceWhich of the following is the correct sequence of layers in the vessel wall from superficial to deep?1061views6rank
Multiple ChoiceReduction in the lumen diameter of a blood vessel as the smooth muscle contracts is known as __________.1242views9rank
Multiple ChoiceWhich of the layers of an artery wall is regulated by the sympathetic nervous system and many hormones?1098views12rank
Textbook QuestionWhich of the following would not result in the dilation of the terminal arterioles and upstream arterioles in systemic capillary beds? a. a decrease in local tissue O₂ content, b. an increase in local tissue CO₂, c. a local increase in histamine, d. a local increase in pH.99views1rankHas a video solution.
Textbook QuestionThe structure of a capillary wall differs from that of a vein or an artery because a. it has two tunics instead of three, b. there is less smooth muscle, c. it has a single tunic—only the tunica intima, d. none of these.136viewsHas a video solution.
Textbook QuestionBlood flow in the capillaries is steady despite the rhythmic pumping of the heart because of the a. elasticity of the large arteries, b. small diameter of capillaries, c. thin walls of the veins, d. venous valves.140views1rankHas a video solution.
Textbook QuestionMultiple Choice More than one choice may apply. Which layer of the artery wall thickens most in atherosclerosis? a. Tunica media b. Tunica intima c. Tunica adventitia d. Tunica externa82views1rankHas a video solution.
Textbook QuestionDescribe neural and chemical (both systemic and local) effects exerted on the blood vessels when you are fleeing from a mugger. (Be careful, this is more involved than it appears at first glance.)81viewsHas a video solution.
Textbook QuestionWhen we are cold or the external temperature is low, most venous blood returning from the distal part of the arm travels in the deep veins where it picks up heat (by countercurrent exchange) from the nearby brachial artery en route. However, when we are hot, and especially during exercise, venous return from the distal arm travels in the superficial veins and those veins tend to bulge superficially in a person who is working out. Explain why venous return takes a different route in the second situation.71viewsHas a video solution.
Textbook QuestionMark the following statements as true or false. If a statement is false, correct it to make a true statement.c. The tunica media consists of smooth muscle cells innervated by vasomotor nerves.27viewsHas a video solution.
Textbook QuestionMark the following statements as true or false. If a statement is false, correct it to make a true statement.b. The tunica intima is composed of a sheet of endothelium, connective tissue, and the internal elastic lamina.31viewsHas a video solution.
Textbook QuestionCapillaries consist of:a. three thin tunics.b. only a thin tunica intima with a well-developed internal elastic lamina.c. a thin sheet of endothelium with a basal lamina.d. stratified epithelium.32viewsHas a video solution.
Textbook QuestionMark the following statements as true or false. If a statement is false, correct it to make a true statement.b. Increased concentrations of carbon dioxide and hydrogen ions and a decreased concentration of oxygen in the interstitial fluid cause local arteriolar constriction.32viewsHas a video solution.
Textbook QuestionMark the following statements as true or false. If a statement is false, correct it to make a true statement.e. The sympathetic nervous system causes vasodilation in the skin when body temperature decreases.35viewsHas a video solution.
Textbook QuestionCollagen vascular diseases weaken the collagen in the tunica externa of blood vessels. Predict the effects of such a disease.18viewsHas a video solution.