Biology Communication Hsc

Population – A group of individuals that belong to the same species and live in the same area
cell cycle – the regular pattern of growth, DNA duplication and cell division that occurs in eukaryotic cells
hypothesis – an educated guess that attempts to explain an observation or answer a question
Receptor protein – Transport information from outside of cell into interior of cell; end of receptor sticks out and has a special shape that only fits a particular kind of molecule
Death – The irreversible ending of life activities for a cell, tissue, organ, or organism.
osmoregulation. – the control of the water balance
of the blood, tissue or cytoplasm of a living
primary cell wall – a relatively thin and flexible layer in plant cells, first secreted by a young cell
eukaryotes – organisms that have a membrane bound nucleus and membrane bound organelles
heart murmur – A hissing sound that most often results from blood squirting backward through a leaky valve in the heart.
Cohesion – The tendency for similar molecules to stick together.
When skin is exposed to sunlight, the body can produce:
How are neurones adapted for their purpose? – They're long, have branched endings (dendrites) to pick up impulses and have an insulator sheath.
chromatin – DNA with attached proteins which is found SPREAD OUT in the nucleus of NON-DIVIDING cells
steroid – A type of lipid characterized by a carbon skeleton consisting on four fused rings with various chemical groups attached.
Osmotic Pressure – Pressure that must be applied to prevent osmotic movement across a selectively permeable membrane
Aorta – brings oxygen rich blood from the left ventricle to the body
uterus – In the reproductive system of a mammalian female, the organ where the development of young occurs; the womb.
acid – the number of hydronium ions is greater than the number of hydroxide ions
When skin is expоsed tо sunlight, the bоdy cаn produce:
Photosynthesis – The process of converting light energy to stored as sugar
symbiosis – interaction between two different organisms living in close physical association
thylakoids – membraneous system in the chloroplast, flattened and interconnected sacs
Which two hormones are secreted by the ovaries? – Estrogen and progesterone

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