The Human Excretory System

Author:Mary Jones & Geoff Jones
Upper Secondary: IGCSE
IMPORTANT

Important Questions on The Human Excretory System

HARD
IMPORTANT

Copy and complete these sentences, using some of the words in the list. You may use each word once, more than once or not at all.

Absorption, amino acids, digestion, dioxide, fatty acids, ingestion, kidneys, liver, lungs, metabolism, monoxide, respiration, stomach, urea, urine, waste products

Excretion involves the removal of _______ ________ of _______ from the body. Carbon _______ is produced by all cells during _____ and is excreted by the ______. Urea is produced in the ______ from excess _______ _______ and is excreted by the ________, dissolved in water to form ____.

 

HARD
IMPORTANT

The diagram below shows what happens during filtration in the glomerulus of a kidney.

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(f) Explain what happens to molecules in the filtrate before urine leaves the kidney. 

HARD
IMPORTANT

The diagram below shows what happens during filtration in the glomerulus of a kidney.

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Explain how filtration differs from the processes of which molecules move through the membrane? 

MEDIUM
IMPORTANT

The diagram below shows what happens during filtration in the glomerulus of a kidney.

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(d) Name the molecules that pass out of the blood plasma.

HARD
IMPORTANT

Explain the difference between each of the following pairs of terms.

  1. Urine and urea.

HARD
IMPORTANT

Explain the difference between each of the following pairs of terms.

  1. Ureter and urethra.

HARD
IMPORTANT

List three substances which are reabsorbed from the nephron into the blood.

HARD
IMPORTANT

Name two substances found in the blood which you would not find in the fluid inside a renal capsule.

HARD
IMPORTANT

Why is this high blood pressure needed in glomerulus?

HARD
IMPORTANT

How is a blood pressure built up in a glomerulus?

HARD
IMPORTANT

Which blood vessels bring blood to the kidneys?

HARD
IMPORTANT

What happens to the excess protein you eat?