gas exchange and cell transport

Question 1

organelle

Answer 1

specialised until within a cell

Question 2

cell

Answer 2

basic building block for all organisms

Question 3

tissue

Answer 3

group of cells working together to perform a shared function

Question 4

organ

Answer 4

structure made of different tissues working together to perform specific functions

Question 5

organ system

Answer 5

group of organs with related functions

Question 6

as volume increases does SA increase at the same rate

Answer 6

no

Question 7

how is effectiveness of gas exchange increased

Answer 7

thin walls
large surface area
moist

Question 8

examples of things with high surface area (3)

Answer 8

alveoli, villi, leaves

Question 9

where is short distance required for diffusion (3)

Answer 9

capillaries
membranes of cells
flattened shape of structures such as leaves

Question 10

adaptations of alveoli

Answer 10

good blood supply
large surface area
moist
walls 1 cell thick

Question 11

how is effective exchange maintained in alveoli

Answer 11

moving blood and ventilated surfaces mean that a steep concentration gradient can be maintained. This increases effective exchange.

Question 12

human lungs provide exchange surface adapted for:

Answer 12

absorbing oxygen
transferring C02

Question 13

what is the diameter of one alveoli

Answer 13

300 μm

Question 14

bronchi

Answer 14

bronchi are the two major air tubes in the lungs.

Question 15

capillary

Answer 15

Tiny blood vessels with walls one-cell thick where exchange of materials occurs.

Question 16

diaphragm

Answer 16

A large sheet of muscle that separates the lungs from the abdominal cavity.

Question 17

intercostal muscles

Answer 17

Sets of muscles between the ribs which raise and lower the rib cage

Question 18

villi

Answer 18

Finger-like projections in the small intestine that provide a large surface area for the absorption of food.

Question 19

diffusion definition

Answer 19

movement of particles from high to low concentration

Question 20

osmosis definition

Answer 20

diffusion of water from dilute to concentrated solution through a semi permeable membrane

Question 21

active transport definition

Answer 21

movement of particles from low to high concentration

Question 22

what does active transport require

Answer 22

energy

Question 23

does diffusion require energy

Answer 23

no
passive process

Question 24

does osmosis require energy

Answer 24

no
passive process

Question 25

example of where osmosis takes place

Answer 25

absorb water from soil
root hair cell

Question 26

example of where active transport takes place

Answer 26

absorb mineral ions from soil
root hair cells

Question 27

example of where diffusion takes place

Answer 27

stomata
capillaries
villi
alveoli

Question 28

factors that affect rate of diffusion (3)

Answer 28

difference in concentration
temperature
surface area

Question 29

osmosis rpa
what’s the independent variable

Answer 29

sugar solution concentration

Question 30

osmosis rpa
what is the control variable

Answer 30

surface area and volume of potato sample
time potato is in solution