The Circulatory System BLOOD VESSELS AND CIRCULATION correctly answered 2023 passed

The Circulatory System BLOOD VESSELS AND CIRCULATIONarteries - correct answer carry blood away from the heart; more muscular than veins and appear more circular in tissue sections; blood flow pulses, has high and low blood pressure points veins - correct answer carry blood to the heart; greater blood capacity for blood containment than arteries; blood flow is steady, continuous low blood pressure; have valves to ensure the one way flow of blood veins are referred to as capacitance vessels - correct answer they expand easily to accommodate an increased volume of blood capillaries - correct answer connect the smallest arteries to the smallest veins; exchange vessels of the cardiovascular system; made of basal lamina and endothelium tunica interna - correct answer internal lining of vessel walls; called the endothelium; secretes chemicals that stimulate dilation or constriction; form valves of veins types of arteries - correct answer conducting (biggest ones- right out of the heart; expand during ventricle contraction and relax during disystole); distributing (provide blood to organs); resistance smallest arteries - correct answer arterioles aneurysm - correct answer a weak, bulging point in the wall of a heart chamber or blood vessel that presents a threat of hemmorage carotid sinuses - correct answer baroreceptors; located near the branch of the common carotid arteries carotid bodies - correct answer chemoreceptors that monitor the change in blood composition aortic bodies - correct answer chemoreceptors; located in the aortic arch near the arteries to the head and arms continuous capillaries - correct answer occur in most tissues such as skeletal muscle pericytes - correct answer wrap around continuous capillaries and can contract to regulate blood flow through the capillaries; regulate blood flow through the capillaries, and contribute to vessel growth and repair fenestrated capillary - correct answer have pores that allow for rapid passage of small molecules; in kidney, small intestines, endocrine cells, choroid plexuses of the brain sinusoids (discontinuous capillary) - correct answer irregular blood-filled spaces in the liver, bone marrow, spleen and some other organs; proteins and blood cells can pass through these capillaries glossopharyngeal nerve - correct answer sensory signals travel from the carotid bodies to the brainstem via this cranial nerve sensory structures in arterial walls - correct answer chemoreceptors, baroreceptors vagus nerve - correct answer sensory signals travel from the aortic bodies to the brainstem via this cranial nerve basal lamina - correct answer non-cellular, pertinacious material that surrounds the capillary endothelial cells and separates it from adjacent connective tissue tight junctions - correct answer in continuous capillaries, the endothelium forms a continuous tube held together by these junctions postcapillary venules - correct answer smallest of the veins; receive blood directly from the capillaries; often surrounded by pericytes