Year 8 Science – Living Systems: Body Systems 1
Practise linking the structure of body systems to their functions, predicting the effects of disorders, and reading simple data on heart rate, magnification and koala numbers. 20 questions. 25 minutes.
The inside wall of the small intestine is covered in tiny finger-like folds called villi. What is their main job?
Capillaries have walls only one cell thick. How does this help the circulatory system?
Choose the word that completes the blank.
Because the stomach is built from several different tissues working together, it is classed as a single 1.
Blank 1: tissue · organ · cell
A celery stalk stands in red dye for three hours. A cut across the stem then shows red dots in a ring. What do the red dots show?
A student views a leaf cell at a total magnification of 400× using a 10× eyepiece lens. What is the magnification of the objective lens?
Circle 2 words in the sentence below.
Click the two words that name the organ that absorbs water from undigested food and forms faeces.
mouth→stomach→smallintestine→largeintestine
How many more beats per minute does the heart make when sprinting than when jogging?
| Activity | Heart rate (beats per minute) |
|---|---|
| Resting | 70 |
| Walking | 95 |
| Jogging | 130 |
| Sprinting | 170 |
Choose the word that completes each blank.
In coeliac disease the 1 lining the small intestine are damaged, so the body absorbs 2 nutrients.
Blank 1: villi · alveoli · kidneys
Blank 2: more · just as many · fewer
During an asthma attack the airways in the lungs become narrower. Which effect is most likely?
Which order shows the path of oxygen from the air outside the body to a muscle cell?
Choose the word that completes each blank.
In the lungs, oxygen 1 from the air in the alveoli into the blood. The alveoli are well suited to this because their walls are 2.
Blank 1: diffuses · is pumped · is digested
Blank 2: thick · muscular · thin
By how many did the koala count fall from 1990 to 2020?
| Year | Koalas counted in a region |
|---|---|
| 1990 | 5000 |
| 2000 | 4200 |
| 2010 | 3100 |
| 2020 | 2300 |
Sam donates one of her two kidneys to her brother. What is the most likely effect on Sam's body?
Circle 1 word in the sentence below.
Click the introduced predator that has caused native Australian mammals to decline.
foxeskoalasrabbitsthylacines
Choose the word that completes each blank.
Muscle cells use glucose and oxygen to release energy, which also produces water and 1. This process is called cellular 2.
Blank 1: urea · carbon dioxide · oxygen
Blank 2: breathing · respiration · digestion
Extreme heat kills the eucalyptus trees in part of a koala's range. What is the most likely effect on koalas there?
Fatty deposits partly block an artery supplying a person's heart muscle. What is the most likely result?
Choose the word that completes the blank.
Onion skin cells stained with iodine show a cell wall and a nucleus, but they have no 1, which are green and found in leaf cells.
Blank 1: vacuoles · cell walls · chloroplasts
A student fills Visking tubing with glucose and starch solution and places it in water. Later the water contains glucose but no starch. Which idea does this model support?
Circle 2 words in the sentence below.
Besides the kidneys, click the two organs that remove metabolic wastes from the body.
lungsstomachskinoesophagus