A and P 2 Chapter 19 Blood Vessels -- Long Term Regulation
In the direct renal mechanism, what happens if blood volume or Blood pressure increases?
If blood volume or Blood pressure increases then kidney tubules increase their speed. In addition, because the tubules can't handle all of the increased work, more of the fluid leaves the body as urine.
What happens to BP if there is an increase in blood volume?
If there is increase in blood volume then there is an increase in Blood Pressure
What happens to BP if there is a decrease in blood volume?
if there is a decrease in blood volume then there is a decrease in Blood Pressure
In the steps of the indirect renal mechanism: As arterial Pressure decreases, the Kidneys release renin into the blood. The renin cleaves angiotensinogen turning it into Angiotensin I. The angiotensin converting Enzyme (ACE) converts angiotensin I into angiotensin II. The angiotensin II then acts in four ways to stabilize arterial BP and extracellular fluid volume. What four ways does the angiotensin II act to stabilize Arterial BP and extracellular fluid volume?
1. It stimulates the adrenal cortex to secrete aldosterone 2. it stimulates the posterior pituitary to relase ADH 3. It stimulates the hypothalamus which triggers its thirst centers encouraging increase water intake 4. Angiotensin II is a potent vasoconstrictor in and of itself which increases BP by increasing peripheral resistance
Describe the steps of the indirect renal mechanism: As arterial Pressure decreases, the Kidneys release renin into the blood. The renin cleaves angiotensinogen turning it into Angiotensin I. The ____________ converts ______________into __________. The _____________then acts in four ways to stabilize arterial BP and extracellular fluid volume.
Angiotensin converting enzyme, angiotensin I, angiotensin II, angiotensin II
Describe the steps of the Indirect Renal Mechanism.
As arterial Pressure decreases, the Kidneys release renin into the blood. The renin cleaves angiotensinogen turning it into Angiotensin I. The angiotensin converting Enzyme (ACE) converts angiotensin I into angiotensin II. The angiotensin II then acts in four ways to stabilize arterial BP and extracellular fluid volume.
Long term regulation means regulation of ______ _____ where ______ mechanisms, primarily the _________ are the intermediary.
Blood volume, renal, kidneys
In the direct renal mechanism, what happens if blood volume or Blood pressure decreases?
If Blood Pressure or Volume is low, water is conserved and then returned to the bloodstream.
In the direct renal mechanism, do hormones play a role?
No. the direct renal mechanism alters blood independently of hormones
Blood Pressure can be regulated indirectly via the ________ ________ _______ __________.
Renin-angiotensin aldosterone mechanism
What does renal mean?
The kidneys
Renal mechanisms act both __________ and __________ to maintain long term mechanisms of BP control
directly, indirectly
Describe the steps of the indirect renal mechanism: As arterial Pressure decreases, the Kidneys release _______into the blood. The renin _______angiotensinogen turning it into ___________. The __________ _________ _________ (ACE) converts angiotensin I into angiotensin II. The angiotensin II then acts in four ways to stabilize arterial BP and extracellular fluid volume.
renin, cleaves, angiotensin I, angiotensin converting enzyme
