EXCRETION IN PLANTS AND ANIMALS - POST ASSESSMENT

Why do plants produce carbon dioxide and oxygen?

• Carbon dioxide is a waste product of respiration and oxygen is a waste product of photosynthesis

• Carbon dioxide is a waste product of photosynthesis and oxygen is a waste product of respiration

• Carbon dioxide and oxygen are both waste products of photosynthesis

Which of the following is an important function of stomata in a leaf?

• Absorbing water vapor from the air

• Allowing gaseous waste products to leave the plant

• Producing chlorophyll for photosynthesis

Which substance is excreted from the lungs?

• Water vapor

• Urea

• Excess salt

What does urine contain?

• Water and urea only

• Water and salts only

• Water, urea and salts

Which tube in the urinary system goes from the kidney to the bladder?

• The collecting duct

• The ureter

• The urethra

Where is the glomerulus found?

• Around a convoluted tubule

• In the loop of Henle

• In the Bowman's capsule

What does the filtrate in the Bowman's capsule contain?

• Water, ions, urea and proteins

• Water, ions, urea and glucose

• Water, urea, ions and red blood cells

Where does selective re-absorption of glucose happen in the nephron ?

• In the proximal (first) convoluted tubule

• In the distal (second) convoluted tubule

• In the collecting duct

What happens if the blood plasma is too concentrated?

• Less ADH is released, causing more water to be reabsorbed in the nephrons

• More ADH is released, causing less water to be reabsorbed in the nephrons

• More ADH is released, causing more water to be reabsorbed in the nephrons

Which blood vessels supply the kidneys?

• The hepatic arteries

• The renal arteries

• The pulmonary arteries