Excretion MOCKS

Question 1

ADH

Answer 1

osmoregulation is control of body’s water content

• ADH is produced by pituitary gland
• Osmoreceptor cells lose water and shrink
• increase ADH production by pituitary gland
• ADH arrives at the collecting duct and binds to receptor
• increased permeability of cell membrane
• water moves from high water potential to low water potential

Question 2

Excretory products of lungs

Answer 2

Carbon dioxide

Question 3

Products of extraction in skin

Answer 3

Sweat- water/sodium ions

Question 4

Excretory products of kidneys

Answer 4

Urea

Question 5

Composition of urine

Answer 5

water, salts and urea

Question 6

How kidney carries out its role of excretion

Answer 6

The kidney produce urine by removing toxic waste products and excess water from the body. Urine formed in each kidney passes through the ureter, flows into bladder before finally being excreted through the urethra

Question 7

Ultrafiltration is

Answer 7

Filtration on a micro scale
During this process, small soluble molecules are filtered out of the blood and pass into the lumen (internal space) of the nephrons

Question 8

Glomerulus pressure

Answer 8

The diameter of the arteriole that brings blood to the glomerulus is greater than the diameter of the arteriole carrying blood away from the glomerulus
There is a build of hydrostatic pressure inside the glomerulus capillaries
Blood plasma is forced out of the glomerulus into the through the basement membrane

Question 9

Composition of glomerular filtrate

Answer 9

The Glomerular filtrate consists majorly of water and other constituents such as

• acids
• glucose, potassium, sodium
• urea