ch 20 smartbook missed questions Flashcards
the basal ______ is the non-cellular, proteinaceous material that surrounds the capillary endothelium and separates it from adjacent connective tissue
lamina
choose all that make up the capillary wall
endothelium
basal lamina
in some places short vessels called _______ link arterioles to capillaries or provide shortcuts that bypass the capillaries
metarterioles
in continuous capillaries the endothelium forms a continous tube gel together by ______ junctions
tight
choose all function of the arterial sense organs
monitor blood chemistry
monitor blood pressure
continous capillaries
most tissues
ex. skeletal muscle
fenestrated capillaries
organs that engage in rapid absorption or filtration of small molecules
ex. small intestine, kidenys
sinusoids
areas where large proteins and cells need to enter or leave the bloodstream
ex. liver, spleen
the basal lamina is a thin layer composed of which of the following
proteins and carbs
which statement is true about pericytes
it is thought they can contract and regulate blood flow
the diameter of some capillaries is even smaller than the diameter of a RBC
true
capillaries that are especially important in organs that engage in rapid absorption or filtration are called ______ capillaries
fenestrated
which term refers to short vessels that link arterioles to capillaries
metarterioles
irregular blood-filled spaces in the liver, bone marrow, spleen, and some other organs are called _______
sinusoids
the terms continous, fenestrated, and discontinous are used to describe the 3 types of what
capillaries
which may regulate blood flow through the capillaries, and contribute to vessel growth and repair
pericytes
capillaries are organized into networks called which of the following
capillary beds
which type of capillary is especially important in organs that engage in the rapid absorption or filtration of small molecules such as the intestine and kidney
fenestrated
which capillaries have filtration pores that allow small molecules to pass through their endothelial cells
fenestrated
large molecules such as clotting proteins and albumin synthesized by the liver enter the blood through which of the following
sinusoids
which is a function of precapillary sphincters
regulate blood flow to various areas
in continous capillaries the endothelium forms a continous tube held together by _____ junctions
tight
the type of blood vessel regarded as capacitance vessels are
veins
what best defines a capillary bed
a network of capillaries supplied by a single arteriole or metarteriole
post capillary venules are the smallest type of
vein
blood flow into capillary bed is regulated by smooth muscle structures called _____ sphincters which surround the openings to the capillaries
precapillary
rank the types of veins from smallest to largest
- post capillary venules
- muscular veins
- medium veins
- venous sinuses
- large veins
which type of venule receives blood from the post capillary venules
muscular
which are regarded as the capacitance vessels because they expand easily to accommodate an increased volume of blood
veins
valves that direct blood towards the heart are formed by infoldings of which layer of the vein wall
tunica interna
where is smooth muscle found in large veins
in all 3 tunics
which type of vessel receives blood from capillaries directly or by way of the distal ends of the thoroughfare channels
postcappilary venules
veins that have become permanently distended and colvulted due to a loss of competence of the evenous valves are known as _________ veins
varicose
Large veins have diameters greater than which of the following
10 mm
How many layers of smooth muscle do muscular venules have
1 or 2
