Transport In Animals

Question 1

Closed circulatory system and example or organism

Answer 1

Fish
Blood in vessels
Pressure maintained and can be higher
Faster flow
Flow directed to certain tissues/organs

Question 2

Define cardiac cycle

Answer 2

The sequence of events involved in one heart beat

Question 3

Events in inhaling (inspiration)

Answer 3

Diaphragm contracts, downwards, pushes organs down
Intercostal muscles contact, rib cage up and out
Volume in chest cavity increases
Pressure in chest cavity falls below atmospheric pressure
Air pushed into lungs by higher atmospheric pressure

Question 4

Features of a good gaseous exchange surface

Answer 4

Large surface area
Thin barrier
Steep concentration gradient

Question 5

Open circulatory system, and example of organism

Answer 5

Insects
Blood circulates around organs and cells
No separate tissue fluid
Pressure can't be raised
Circulation affected by body movements
Mix of oxygenated and deoxygenated blood

Question 6

Passive transport

Answer 6

Net movement of molecules
Doesn’t need metabolic energy in form of ATP
Uses kinetic energy
Only if concentration gradient