Section 2-Excretion Flashcards
Where does the blood in the hepatic portal vein come from
The duodenum and ileum
Which blood vessel do the central veins in the liver lobules connect to
Hepatic vein
What are sinusoids
Capillaries that connect the hepatic artery and the hepatic portal vein the centre vein in the liver
Name three substances reabsorbed in the proximal convoluted tubule
Glucose Amino acid Vitamins Water Urea Salts
Why is it important that the afferent arteriole larger in diameter than the efferent arteriole
The blood in the glomerulus is under high pressure
High pressure forces liquid and small molecules in the blood out the capillary into renal capsule (ultrafiltration)
Which limb of the loop of henle is impermeable to water
Ascending limb
Explain why a longer loop of Henle allows more concentrated urine to be produced
More ions are actively pumped out into the medulla
Creates a low water potential
More water moves out of the nephron and collecting duct into capillaries
Giving concentrated urine
Which hormone is detected in a pregnancy test
hCG
A pregnancy test use antibodies bound to a blue bead. What colour will the test strip turn in a negative pregnancy test
No colour change
What effect do anabolic steroids have on muscle
Increase muscle mass
What technique is used to test a urine sample for the presence of anabolic steroids
Gas chromatography
How does gas chromatography work
Sample is vaporised
Passed through a column
Different substances move through the column at different speeds
Length of time taken varies
What causes respiratory acidosis
Result of high carbon dioxide levels in the blood
Carbon dioxide reacts to form carbonic acid in the blood
Makes blood acidic
Why does the liver have two supply of blood
Oxygenated blood via aorta and hepatic artery- aerobic respiration
From digestive system - to filter out toxic and excess products before the blood is transported around the body
Define excretion
The removal of waste products of metabolism from the body