Transport systems in plants and animals Flashcards Preview

AQA Further Biology > Transport systems in plants and animals > Flashcards

Flashcards in Transport systems in plants and animals Deck (23)
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0
Q

What are the 4 chambers of the heart?

A

Left and right atria and ventricles

1
Q

Where does each circuit of a double circulatory system go?

A

Lungs and all the other organs of the body

2
Q

Which blood vessel leaves the left ventricle?

A

Aorta

3
Q

Which blood vessel leaves the right ventricle?

A

Pulmonary artery

4
Q

What do heart valves do?

A

Prevent backflow

5
Q

Why is the muscle on the left thicker than the right?

A

It has to pump the blood further

6
Q

Why do arteries have thick muscular walls?

A

To withstand recoil (stretch and spring back)

7
Q

What is useful about a capillary?

A

It is one cell thick - short diffusion pathway

8
Q

Do veins have valves?

A

Yes, because the pressure is lower than arteries

9
Q

Is blood a tissue or an organ?

A

Tissue

10
Q

What shape are red blood cells?

A

Biconcave discs

11
Q

Why don’t red blood cells have nuclei?

A

So they can pack in as much haemoglobin as possible

12
Q

What is made when oxygen and haemoglobin combine?

A

Oxyhaemoglobin

13
Q

What can white blood cells do? (3 marks)

A

Engulf and ingest pathogens Produce antibodies Produce antitoxins

14
Q

What are platelets?

A

Small fragments of cells

15
Q

What is plasma? Give 6 things it carries.

A

Pale straw coloured liquid which carries everything in the blood, including red and white blood cells, platelets, nutrients like amino acids and glucose, carbon dioxide, urea, hormones, antibodies and antotoxins

16
Q

What is a stent?

A

A wire mesh tube which can widen arteries

17
Q

What is artificial blood?

A

A substitute for blood

18
Q

Which tissue in plants transports food?

A

Phloem

19
Q

What vessel in plants transports water and ions?

A

Xylem

20
Q

Are xylem vessels a continuous tube?

A

Yes, thickened with lignin

21
Q

Which piece of apparatus measures transpiration rate?

A

A potometer

22
Q

What is this?

A

An artificial heart