Mass transport

Risk factors of lung disease

Smoking

Genetic makeup

Air pollution

Occupations

Why does correlation not prove causation

Could be a coincidence and there may be other contributing factors

Why do large organisms need a mass transport system

low surface area to volume ratio

Larger organisms have a higher metabolic rate

What is a double circulatory system

A circlutory system where blood passes through the heart twice

Why do humans need a double circulatory system

Allows separation on oxygenated and deoxygenated blood

Helps maintain high blood pressure

What is heamoglobin

A protein with a quaternary strucutre

Combined with oxygen= oxyhemoglobin

Where in the body will you find high partial pressure of oxygen

Lungs

What is oxygen affinity

When the partial pressure of oxygen is high, oxygen loads readily with the haem group. Now the haemoglonin has high affinity

How does water move from the soil to the leaves of a plant

The water moves through the plant by transpiration. The water is absorbed through the root hair cells by osmosis as there is a higher water potential in the soil to the area of low water potential in the root hair cells across a semi-permeable membrane. The root hair cell is adapted for fast osmosis by having projections to increase surface area. Thr water is pulled up the xylem in the transpiration stream.

What is carbon dioxide used for in plants

Photosynthesis

What is oxygen used for in plants

Respiration

What is water used for in plants

Photosynthesis

Why is glucose needed in plants

Energy for respiration

Why are mineral ions used in plants

Growth

What is the phloem

Living tissue that transports organic substances in plants

What is translocation

Movement if organic solutes . Eg. Sucrose to a sink through the phloem

What is mass flow theory