Excretion Assignment

  1. 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

2

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

Absorbing water vapour from the air

Allowing gaseous waste products to leave the plant

Producing chlorophyll for photosynthesis

3

Which substance is excreted from the lungs?

Water vapour

Urea

Excess salt

4

What does urine contain?

Water and urea only

Water and salts only

Water, urea and salts

5

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

The collecting duct

The ureter

The urethra

6

Where is the glomerulus found?

Around a convoluted tubule

In the loop of Henle

In the Bowman’s capsule

7

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

8

Where does selective reabsorption of glucose happen in the kidney nephron?

In the proximal (first) convoluted tubule

In the distal (second) convoluted tubule

In the collecting duct

9

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

10

Which blood vessels supply the kidneys?

The hepatic arteries

The renal arteries

The pulmonary arteries

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