the afferent arterioles, which is a branch of the renal artery, supplies blood to the glomerulus
the afferent arteriole has a wider diameter than the efferent arteriole
this difference in diameter of afferent and efferent vessels causes high pressure leading to ultra filtration
the walls of the blood capillaries are one cell thick hence glucose, amino acids, vitamins,
hormones, salts, cratinine, urea and water filter into Bowman’s capsule to form glomerular filtrate
white blood cells, red blood cells, plasma proteins (such as globulin) and platelets are too large to pass through the capillary walls hence remain in blood capillary
the filtrate flows into proximal convoluted tubule where amino acids, vitamins and all glucose are selectively reabsorbed back into the blood stream
many mitochondria provide energy for reabsorption of these substances against a concentration gradient by active transport
the glomerular filtrate ?ows into the loop of Henle
water in the descending loop moves by osmosis into the blood capillaries
sodium chloride is actively pumped from the ascending arm of the loop of Henle into the blood capillaries
the glomerular filatrate ?ows into the distal convoluted tubule
water and salts are reabsorbed from distal convoluted tubule into blood capillaries
the glomerular filtrate ?ows into collecting tubule (duct) from where more Water is reabsorbed into blood stream
antiduretic hormone in?uences the amount of Water reabsorbed depending on osmotic pressure of blood
the glomerular filtrate from collecting duct, now referred to as urine, is emptied into pelvis and ureter into bladder and out of body through urethra
urine consists of excess water, slats and nitrogenous wastes
Mohaissack answered the question on October 5, 2017 at 14:21
- State the functions of the liver(Solved)
State the functions of the liver
Date posted: October 5, 2017. Answers (1)
- State three functions of cuticle found in plant leaves(Solved)
State three functions of cuticle found in plant leaves
Date posted: October 5, 2017. Answers (1)
- What is the role of lungs in excretion?(Solved)
What is the role of lungs in excretion?
Date posted: October 5, 2017. Answers (1)
- Explain how the mammalian skin is adapted to its functions(Solved)
Explain how the mammalian skin is adapted to its functions
Date posted: October 5, 2017. Answers (1)
- List excretory organs and products of mammals(Solved)
List excretory organs and products of mammals
Date posted: October 5, 2017. Answers (1)
- Describe excretion in unicellular organisms(Solved)
Describe excretion in unicellular organisms
Date posted: October 5, 2017. Answers (1)
- State the excretory products of plants and some of their uses to humans(Solved)
State the excretory products of plants and some of their uses to humans
Date posted: October 5, 2017. Answers (1)
- Why do plants lack complex excretory structures like those of animals?(Solved)
Why do plants lack complex excretory structures like those of animals?
Date posted: October 5, 2017. Answers (1)
- Describe how excretion takes place in green plants(Solved)
Describe how excretion takes place in green plants
Date posted: October 5, 2017. Answers (1)
- (a)What is the function of the objective lens in a light microscope? (b)Give one advantage of using a light microscope over that of electron microscope.(Solved)
(a) What is the function of the objective lens in a light microscope?
(b) Give one advantage of using a light microscope over that of electron microscope
Date posted: October 5, 2017. Answers (1)
- Explain why excretion is necessary in plants and animals(Solved)
Explain why excretion is necessary in plants and animals
Date posted: October 5, 2017. Answers (1)
- Define the following terms: (i) Excretion (ii)Secretion (iii) Egestion (iv)Homeostasis(Solved)
Define the following terms
(i)Excretion
(ii)Secretion
(iii)Egestion
(iv)Homeostasis
Date posted: October 5, 2017. Answers (1)
- Mention the types of experiments carried out for respiration(Solved)
Mention the types of experiments carried out for respiration
Date posted: October 5, 2017. Answers (1)
- Explain the disadvantages of anaerobic respiration(Solved)
Explain the disadvantages of anaerobic respiration
Date posted: October 5, 2017. Answers (1)
- Why does anaerobic respiration of a given substrate yield a smaller amount of energy than aerobic respiration?(Solved)
Why does anaerobic respiration of a given substrate yield a smaller amount of energy than aerobic respiration?
Date posted: October 5, 2017. Answers (1)
- State functions of DNA molecule(Solved)
State functions of DNA molucule
Date posted: October 5, 2017. Answers (1)
- What is respiratory quotient(RQ)?(Solved)
What is respiratory quotient(RQ)?
Date posted: October 5, 2017. Answers (1)
- State the economic importance of anaerobic respiration(Solved)
State the economic importance of anaerobic respiration
Date posted: October 5, 2017. Answers (1)
- How does movement in plants differ from that of animals?(Solved)
How does movement in plants differ from that of animals?
Date posted: October 5, 2017. Answers (1)
- Why does lactic acid level reduce after exercise?(Solved)
Why does lactic acid level reduce after exercise?
Date posted: October 5, 2017. Answers (1)