Life & Living Flashcards
What are the building block that make up all living organisms?
Cell’s
What do you call single cell organisms?
(give Example)
unicellular
(Bacteria)
What do you call organisms that are made up of many cells?
(example)
multi cellular
(tree)
Name 4 differences between plant and animal cells
Animal cell:plant cell
1: No cell wall: cell wall
2: no chloroplast present: has chloroplast
3: More flexible eregular shape: rigid shape
4: Small or no vacuole: vacuole
Formula for magnification
Magnification=ocular magnification x objective magnification
explain how cells are organized to make up an organism
cells to tissue
tissue to organ
organ to system
system to organism.
what are stem cells?
and where are they found?
cells that have the ability to develop into different specialized cells
1: embryonic development
2: Bone Marrow
what is the purpose of the digestive system?
to break down food into small particles so that it can go into your blood stream
name 4 reasons why food is important?
1: for energy
2: materials for groth
3: to repair damaged tissue
4: to protect from deses and infections
Name the path of food along the alimentary canal
Mouth
oesophagus
stomach
small intestine
large intestine
rectum
anus
name the processes that accur in the digestive system
ingestion
digestion
(machanical and chemical)
absorbtion
ejestion
what is the function of the oesophagus?
The muscles in the walls contract and relax to push the food towards the stomach.
what is the function of the stomach
has digestive juices containing emzimes and hydrocloric acid which parcially break down the food
what is parcially digested food called?
chyme
what is the fuction of the pancreus?
it Sucrets digestive juices into the small intestine.
what is the function of the liver and the gall bladder?
the liver sucrets bile which is stored in the gal bladder and then bile helps digest fats
what is the function of the small intestine?
the walls of the small intestine sucret digestive juices which break own chyme into molecules to absorbed in the blood
what is the function of the large intestine?
temporary storage place for undigested waste material.
What are the 5 essential food groups required by the body?
1:Protien
2: Fats & oils
3: Carbohydrates
4: Fibre
5: Vitamins & minrals
What is the importance of water?
1: Major component of blood which transports substances around the body
2: Its a Medium for chemical reactions to take place
3: It helps when u sweat to cool down your body
4: it helps remove waste through sweat and urine.
what are Carbohydrates needed for?
(example)
They are the main sorce of energy
(bread)
What are proteins needed for?
(example)
To make new cells during groth and to replace damaged cells
(meat)
what are fats and oils needed for?
(example)
1: sorce of energy
2: prevents heat loss
(hot chips)
what is fibre needed for?
(example)
Plant material that isnt digested by humans. It prevents constipation and it absorbs poisonous substances from the digestive system.
(banana)
