Specialisation In Animal Cells Flashcards
Specialised cells may work individually e.g. eggs, or as part of a tissue, organ, or organism. True or false.
True
What are nerve cells specialised for?
To carry electrical impulses around the bodies of animals.
In nerve cells, what do dendrites do?
Make connections to other nerve cells.
In nerve cells what does an axon do?
Carries the impulse from one place to another.
What do synapses/nerve ending do I nerve cells?
Pass the impulses to other cells using transmitter chemicals.
What do mitochondria in the synapses do?
To transfer the energy needed to make transmitter chemicals.
What does the myelin sheath do in a nerve cell?
Prevents the electrical signals from passing out of the cell.
What are sperms cells specialised to do?
To move through water or the female reproductive system to reach the egg.
What does a sperm cell have which allows it to move?
A tail or flagella
What is the middle section of a sperm cell for?
It contains mitochondria needed to transfer energy for the tail to move.
In a spermcell, what does an acrosome do?
Stores digestive enzymes to break down the outside of the egg.
Why does a sperm cell have a large nuclei?
To contain genetic information
How is a root hair cell adapted?
Increase surface area for osmosis.
Permanent vacuous, speeds up the movement of water from soil to root hair.
Have lots of mitochondria to transfer energy needed for active transport.
What strengthens xylem cells?
Lignin
How are phloem cells adapted?
Cell walls between phloem cells break down to from sieve plates.
Phloem are kept alive with litter structure by companion cells.
.companion cells contain mitochondria to transfer energy needed to move dissolved foods.
