Gastrointestinal Flashcards

1
Q

What does the enzyme renin do?

A

Converts angiotensinogen into angiotensin 1

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2
Q

What converts angiotensin I into angiotensin II?

A

Angiotensin converting enzyme

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3
Q

Which organ releases renin?

A

Kidneys

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4
Q

What does angiotensin II cause?

A

Vasoconstriction of blood vessels
Stimulates the secretion of vasopressin/ADH
Stimulates release of adrenaline, noradrenaline and aldosterone from hte adrenal gland

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5
Q

What does aldosterone do?

A

Affects kidneys:
Sodium retention
Water retention
Potassium excretion. More water= higher vol = higher blood pressure

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6
Q

Name the molecules involved in the renin-angiotensin-aldosterone system.

A

Angiotensinogen –> Angiotensin I –> Angiotensin II

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7
Q

What converts angiotensinogen to angiotensin I?

A

Renin

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8
Q

Angiotensin II stimulates of adrenaline and noradrenaline. What is the reason for this?

A

To cause vasoconstriction of blood vessels to decrease vol and increase BP

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9
Q

Where is aldosterone secreted from?

A

The adrenal cortex

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10
Q

What is the effect of vasopressin?

A

Also known as ADH. Causes water retention by increasing the number of aquaporins in the collecting ducts of kidneys so more water is reabsorbed.

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11
Q

What is renin released in result of?

A

Low blood volume in the collecting ducts in the kidney

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12
Q

Where is angiotensin converting enzyme released from?

A

Lungs

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13
Q

What structure does angiotensin II act on?

A

Adrenal gland

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