The Excretory System (liver/skin)

Question 1

what is excretion

Answer 1

removal of waste chemicals produced by body

Question 2

explain excretion through the liver

Answer 2

breakdown of excess protein which cant be stored

Question 3

what is deamination in the liver

Answer 3

enzymes in the liver remove the amino group from amino acids
the amino group becomes ammonia and then urea
the remaining amino acids becomes carbohydrate used for energy

Question 4

what are the two other livery processes

Answer 4

1. detoxifies alochols and other drugs

2. hemoglobin in red blood cells are broken down in the liver to produce BILE PIGMENTS which are pooed out

Question 5

explainexcretion through skin

Answer 5

a protective layer that helps regulate body temp and secretes substances

Question 6

what does sweat contain

Answer 6

water, urea, NaCl, lactic acid

Question 7

what are the 4 functions of the urinary system

Answer 7

1. excretion of waste
2. elimination of foreign substance (urea)
3. regulation of water in body (bacteria)
4. controls the concentration of compounds in extracellular fluid

Question 8

what is urea and simply explain how it is excreted

Answer 8

the broken down proteins of food

urea is carried in the bloodstream to the kidney’s where it is filtered and then expelled

Question 9

what are the 4 factors that make the kidney a good exchange surface

Answer 9

1. tubules provide large SA for exchange
2. moist surface of glomereulus
3. one cell thick
4. large capillary network (maintains diffusion graident of substance moving into blood)