Stem Cells
Define potency?
The potential a stem cell has for change
What is the movement within the phloem
Multidirectional
True or False – we only breathe in oxygen and breathe out carbon dioxide.
False
What organelle is the powerhouse of the cell?
Mitochondria
Vascular bundle function
Transport critical substances
What can a cell not do once it has specialised?
It cannot revert back.
Name one of the transportation methods used by xylem
Transpiration, Cohesion, Root Pressure
What is the name of the muscle between the ribs?
Intercostal
What is the key difference between prokaryotes and eukaryotes?
membrane bound organelle
What does the chloroplast turn carbon dioxide and water into
Oxygen and Glucose (Sugar)
Level of potency when a cell is specialised?
Unipotent
Why does carbon dioxide move from the capillaries to the alveoli?
The concentration of carbon dioxide is lower in the alveoli - Moves from an area of high to low
What is created when oxygen and haemoglobin are combined?
Oxyhaemoglobin
Why is the cell membrane called the fluid mosaic model?
It is made up of different components that work together to ensure it is semi-permeable.
Where does the partly digested food go after it leaves the stomach?
Small Intestine
Level of potency when a cell remains unspecialised?
Totipotent
Identify the 4 structural features that increases the exchange of gases on gaseous exchange surfaces? (respiratory)
Large surface area, small diffusion distance, extensive blood supply, Moist
Explain the movement of oxygen and carbon dioxide within the respiratory system and why it moves? (alveoli + capillaries, capillaries + cells)
Oxygen moves out of the alveoli into the capillaries (high o2 in alveoli, low o2 in capillaries). Carbon dioxide moves out of the capillaries into the alveoli (high co2 in capillaries, low co2 in alveoli). Oxygen moves into the cell area of low o2, carbon dioxide moves into capillaries area of low co2.
What is osmosis and diffusion?
Osmosis - movement of water molecules
Diffusion - movement of molecules
Both are with a concentration gradient
What direction does deoxygenated blood travel with regards to alveoli?
Towards
List the structure of hierarchical organisation in organisms.
Stem cell -> cell -> tissue -> Organ -> Organ System
What layer of the leaf can you find the photosynthesis taking place.
Mesophyll - spongy/palisade
Where are the alveoli located?
At the end of the bronchioles
What does the surface area of volume ratio allow for?
Define Multipotent
Differentiate into multiple, but limited. It had picked a path and is limited by the options within that path.