L10 Circulation 1 UF

Question 1

What is Ficks law

Answer 1

Rate of diffusion ∝ surface area*concentration difference/thickness of membrane

Question 2

What do cells require and what do thay need to get rid of

Answer 2

Need nutrients and oxygen/
Rid of CO2 and nitrogenous compunds

Question 3

What are the 3 components of a ciculatory system

Answer 3

Circulatory fluid, interconnecting vessels and a muscular pump (heart)

Question 4

What are the 2 types of circulatory system

Answer 4

Open and closed

Question 5

In an open circulatory system, what is the fluid, does it do and in what organisms is it found

Answer 5

Hemolymph
Hemolymph bathes body cells and organs
Arthropods and molluscs

Question 6

In closed circulatory systems where is the blood and what organisms have them

Answer 6

Blood is confined to vessels
Annelids, cephalopods and vertebrates

Question 7

What do arteries branch into and what do they do

Answer 7

Arteries branch into arterioles and carry blood from heart to capillaries

Question 8

What are the sites of chemical exchange between the blood and interstitial fluid

Answer 8

Capillary beds

Question 9

What do venules converge into and their function

Answer 9

Venules converge into veins and return blood from capillaries to the heart

Question 10

How are Arteries and veins distinguished

Answer 10

Direction of blood flow and not O2 content

Question 11

Single circulation system structure and organisms

Answer 11

One atrium and one ventricle
Bony fishes, ray and sharks

Question 12

Double circulation organisms, and features

Answer 12

Amphibians, reptiles, birds and mammals
Oxygen rich and poor blood are pumped separately from right and left sides of heart
Maintains higher blood pressure that single circulation