biology test Flashcards
what does the nervous system consist of?
the cns and other nerves
what is the structure and function of a sperm cell
structure- tail that allows the cell to swim to egg
function- to fertilise the egg
what is mitosis
mitosis is the process of cell division which provides new sales for growth and repair of damaged cells
what happens to plant cells in high solute solution
they shrink and become plasmolysed
what happens to plant cells in pure water
they swell up and become turgid
what happens to animal cells in high solute solutions
they shrink
what happens to animal cells in pure water
they swell up and burst
what is osmosis
osmosis is the movement of water from a region of higher water concentration to a region of lower water concentration through a selectively permeable membrane
what is semi permeable?
tiny holes in the membrane allows some substances but not others to pass in and out of the cell for example the cell membrane is semi permeable
what is diffusion
The movement of molecules from a region of high concentration to a region of lower concentration
function of cell wal
provides structure
function of vacuole
stores cell sap
function of chloroplast
site of photosynthesis
function of nucleus
controls cell activities
function of cytoplasm
site of chemical reactions
function of cell membrane
controls what enters and exit the cell
what are the 3 structures only found in plant cells?
chloroplasts, cell wall and vacuole
what happens to plant cells in high solute solution
they shrink and become plasmolysed
what does the motor neurone do
carries impulses from the CNS towards the effector
what does the interneuron do
transfers impulses from the sensory nerves to the motor nerves as quickly as possible
what does a sensory Neuron do?
carries the impulse from a receptor towards the central nervous system
what are the 3 types of neurons
sensory inter and motor
what’s the function of the medulla
controls breathing and heart rate
what’s the function of the cerebellum
controls balance and muscle coordination
what is the function of the cerebrum
controls conscious thoughts
what does the cns consist of
brain and spinal cord
what does the nervous system consist of?
the cns and other nerves
