ok help with my anatomy homework...im really trying just two mulitple choice please?

Question

Which of the following evens would cause a decrease in mean arterial blood pressure?
A. and increase in ADH production
B. release of atrial natriuretic factor
C.constriction of blood vessels in the skin
D. activation of the renin-angiotensin mechanism
E. an increase in aldosterone production

Which of the following statements regarding regulation of local blood flow is true?
A. increased metabolic rate in a tissue increases capiallary blood flow into the tissue
B. Blood flow throug capillaries is continous
C. Contraction of precapillary sphincters will increase blood flow to a capillary bed.
D. Increased levels of CO2 increase the contraction of precapillary sphincters
E. Tissue need for oxygen and amino acids will cause precapillary sphincters.
Thanks

Answer 1

1st question:
-A: NO. ADH causes Retention of water, and this causes and increase in BP.
-B:YES, cos this factor is a hormone, relased by atrial myocytes in order to lower blood pressure when it is too high.
-C:NO, cos there would be an increase in BP.
-D: renin-angiotensin: NO, bacause renin-angiotensin causes vasoconstriction of arterioles, so an increase in mean BP in the body.
-E: NO, because aldosterone is a sodium saver, that means sodium is not eliminated in the urine. As sodium is retained, water is retained too, and BP would increase, not decrease.

2nd question
A: YES, when the tissue is active, precapillary sphincters dilate, and more blood reaches the tissue.
B:I don't know.
C:NO Contraction of a PCS would cause a decrease BF to a capillary bed.
D:NO, cos increased levels of CO2 cause dilation of the sphincter, so more blood can reach the tissues.
E: What is that? You didn't write the end of the question. In any case, when tissues need more O2 and AAs, the precapillary sphincter will relax, so that more blood would reach the tissues, transporting O2 and AAs.

Answer 2

all of your possibilities are astounding. i'd ought to take E) you're taking a lengthy walk into the barren region. You sit down there for a lengthy time period on a sandstone outcropping. It slowly receives darkish. You watch the barren region fauna come alive and then, because the daylight is going down, they commence to pop up. the celebs! You sit down there and your eyes slowly modify. In an hour or so, it really is darkish, truly darkish. You look up and it really is as in case you grew wings and ascended into the heavens. the celebs are so huge and look so close that you attain out to the contact them. The clusters in Scorpio and Sagittarius are so vibrant you could't tell the position one ends and the different starts. Your heart virtually stops. you comprehend that there'll not at all ever be everywhere else in the international as comforting as this position in this second.

Answer 3

Its clearly NOT multiple choice

A+B+E

A+C+D+E