Excretory System

Question 1

Excretion

Answer 1

Removal of the wastes of metabolism from the body
Importance: most wastes are toxic and harmful to one’s health if allowed to accumulate. Removing wastes before the reach harmful concentrations is important

Question 2

Involvement of lungs in excretion process

Answer 2

Excretion of CO2 produced in cellular respiration

Question 3

Involvement of sweat glands in excretion process

Answer 3

Secrete sweat, largely water and by-products; salts, urea, lactic acid

Question 4

Involvement of alimentary canal in the excretion process

Answer 4

Passes out bile products

Question 5

Involvement of the kidneys in the excretion process

Answer 5

Maintains constant concentration of material in body fluid, removes the nitrogenous waste

Question 6

Urinary system structure names

Answer 6

• Kidneys
• Aorta
• Inferior vena cava
• Renal artery
• Renal vein
• Ureter
• Bladder
• Urethra

Question 7

Urinary system functions

Answer 7

• Kidneys: filters blood, removes waste
• Aorta: carry blood, high in waste
• Inferior vena cava: return from kidney, low in waste
• Ureter: transports urine
• Bladder: stores urine
• Urethra: releases urine (carries from bladder)

Question 8

Deamination

Answer 8

Amino acid group is removed from the amino acid

- occurs in liver with assistance of enzymes

Question 9

Ammonia and urea

Answer 9

• Ammonia is extremely toxic to the body, must therefore be converted to the less toxic substance urea
• Urea can then be excreted in the kidneys and in small amounts through sweat, nails and hair

Question 10

Glutamic acid

Answer 10

An amino acid broken down ammonia plus another acid. Ammonia is a by-product of this reaction