Excretion

Question 1

Define Excretion

Answer 1

Its the process in which the waste is released from the body in the right amount

Question 2

Give examples of Catabolic and Anabolic activities

Answer 2

Catabolic: Tissue Respiration, Deamination of proteins and amino acids to form urea.
Anabolic: Formation of new protoplasm from amino acids, Glucose>Glycogen in liver and muscles

Question 3

Explain catabolic and anabolic activities in terms of molecular breaking and forming

Answer 3

In catabolic activities, the breakdown of molecules is done (complex>simple) whereas in anabolic, the formation of molecules is done (simple>complex)

Question 4

What does metabolic activity produce?

Answer 4

It produces waste products that must me removed

Question 5

Differentiate between Egestion and Excretion

Answer 5

Egestion: Removal of undigested waste from alimentary canal, matter egested is feces and the organs involved are: anus and sometimes the mouth
Excretion: Metabolic waste products and toxic materials are removed from the organs (sweat), matter excreted is sweat, urine and carbon dioxide and the organs involved are: the urethra, skin or the mouth

Question 6

State the main components of the mammalian urinary system

Answer 6

-Pair of kidneys
-Pair of ureter
-Urethra

Question 7

State the points about the location of the Kidneys

Answer 7

-Pair of kidneys
-Abdominal cavity
-Each side of vertebral column
-Lies above waist line
-Left kidney is higher than the right

Question 8

State the points about the structure of the kidney

Answer 8

-Outer-dark region> Cortex
-Inner region> Medulla
-16-20 number of Pyramids
-Origin of ureter> Renal Pelvis
-Depression in kidney> Hilus

Question 9

State the functions of the kidney

Answer 9

-Removing urea
-Excess salts and water from blood

Question 10

State the structure of nephron

Answer 10

-Renal corpuscle>Glomerulus & Bowman’s Capsule
-Renal tubules>Proximal convoluted tubule, Loop of Henle & Distal convoluted tubule