Multicellur Orgnisms
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Step one of mitosis
The chromosomes replicate and become visible. Each chromosomes is two chromatids joined together.
Step 2 of mitosis
The nucleus break down
Step 3 of mitosis
Chromosomes line up along the equator (middle) of the cell. Spindle fibres attach to the middle of the chromosomes
Step 4 of mitosis
Spindle fibres pull the chromatids apart. The chromatid are pulled to opposite ends (poles) of the cell
Step 5 of mitosis
Separated chromatids are now called chromosomes and nuclear membranes form around them
Step 6 of mitosis
The cytoplasm splits. Two daughter cells are made
What does mitosis provide in detail
New cell for growth, repair of damaged tissues and replacement of dead or damaged cells.
What does mitosis maintain
The diploid chromosome complement
Stem cells in animals are
Unspecialised cells which can divide in order to self renew
What do stem cells have the potential to do
They have the potential to become different types of cells
What are stem cells involved in
Growth and repair
Specialisation of cell lead to what? Give examples
Specialisation of cells lead to the formation of a variety of cells, tissues and organs
Finish sentence Groups of _____ which work together form system
Organs
What’s the specialisation of cells hierarchy
Cells——>tissues——>organs—->systems
Chromatids definition
The “wings” of an X snapped chromosome
Equator definition
An imaginary line down the middle of a cell
Spindle fibre definition
Structure that pull the chromatids apart during mitosis
What’s does the nervous system consist of
Central nervous system and other nerves
What does the CNS consist of
Brian and spinal cord
What is the function of the cerebrum
Memory and muscle movement
What I the function of the cerebellum
Balance and coordination
The function of the medulla
Breathing and heart rate
What are the three types of Neurons
Sensory, inter and motor
What do receptors detect
Sensory input/stimuli