History Bookmarks People Window Help × Quiz: unit 4 Lecture uiz ((G Describe the

Question

History Bookmarks People Window Help × Quiz: unit 4 Lecture uiz ((G Describe the path and functix acconline.instructure.com/courses/nz98/quizzes/n50194/take G which of the following state, G Which of the following statements is true of valves in veins? @ they are associated with venous sinuses 0 they are most abundant in limbs they contract to propel blood forward O they prevent blood pressure in veins from dipping below that of arteries DQuestion 8 0.5 pts The vessel layer which is responsible for vasoconstriction is the O tunica intima O tunica media O tunica externa D Question 9 0.5 pts Osmotic pressure is created by the presence in a fluid of small diffusible molecules that easily move through the capillary membrane. O True O False 10

Explanation / Answer

1. as the valves of veins prevent the backflow of the blood , therefore the option "D" is correct.

2. as the tunica media maintains the blood pressure and the circulation so, the smooth mucsles of tunica media can be stimulated to contract causing vasocontactions.

3. yes it is true as when each tissue requires the blood, the autoregulation that is balaced flow to tissue is requied which at that time is called as osmotic pressure.

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