urinary system part 3

28問 • 1年前

問題一覧

Which part of the nephron is 70% and 20% of Ca2+ being reabsorbed ?

PCT-70%, DCT-20%

What 5 hormones affect the extent of Na+, Cl-, Ca2+, and water reabsorption as well as K+ secretion by the renal tubules ?

angiotensin ll, antidiuretic hormone (ADH), aldosterone, atrial natriuretic peptide (ANP), parathyroid hormone (PTH)

What happens when blood pressure drops ?

liver secretes angiotensinogen (vasoconstriction)

What does renin do ?

releases cells in kidney, cleaves angiotensinogen into angiotensin l

What happens when aldosterone is released from adrenal glands ?

stimulates principle cells in the collecting ducts to reabsorb more calcium and chloride and secrete more potassium

What is ADH ?

decreases blood osmolarity

Where is ADH released ?

posterior pituitary gland

What does ADH regulate ?

regulates facultative water reabsorption by increasing water permeability of principle cells

Which part of the nephron does the ADH work on ?

last part of DCT and through collecting duct

When is the atrial natriuretic peptide hormone released ?

when a large increase in blood volume

When is the parathyroid hormone released ?

when there is low level of calcium in blood

Which part of the nephron does it affect ?

DCT

As filtrate travels down the descending loop of henle, does osmolarity increase or decrease ?

increases

As filtrate travels up the thick ascending loop of henle, does osmolarity increase or decrease ?

decreases

Which part of the juxtamedullary nephron is never permeable to water ?

thick ascending loop of henle

Which part of the nephron is not permeable to water unless ADH is present ?

collecting duct

If ADH is present, do you produce dilute or concentrated urine ?

concentrated urine

If ADH is absent, do you produce dilute or concentrated urine ?

dilute urine

What is the primary function of the PCT of the nephron ?

to reabsorb a lot of the stuff that has been filtered out of the blood

What is the primary function of the descending loop of henle ?

create a concentration gradient in the medulla of the kidney as water moves out and solutes stay in

What is the primary function of the ascending loop of henle ?

water isn’t able to move out and moves solutes out

What is the primary function of DCT ?

it’s fine tuning to making sure the final composition of urine is just right

Where is the most HCO3- (bicarbonate) filtered fluid reabsorbed ?

PCT

What type of reflex is responsible for the discharge of urine ?

micturition reflex

What are the layers of the urinary bladder and what structures make up each layer ?

mucosa- mucous membrane composed of transitional epithelium and underlying lamina propria, intermediate muscularis- consists of 3 layers of smooth muscle fibers, adventitia- superficial coat; areolar CT Over superior surface is serosa (layer of visceral peritoneum)

What percentage of glucose gets reabsorbed ?

100%

Which part of the nephron is glucose reabsorbed ?

PCT

What are the 3 layers of the ureters ?

mucosa, muscularis, adventitia

lymphatic system part 2

ユーザ名非公開 · 29問 · 1年前

lymphatic system part 2