specialised animal cells Flashcards
(9 cards)
what does the nerve cell contain
nucleus, nerve ending, cell membrane, cytoplasm
how big are nerve cells
they are thin and can be more than one metre long in your spinal cord
what does the nerve cell do
carry messages up and down the body over large distances very quickly
what increase the speed of nerve cells
the fatty myelin sheath that surrounds them increases the speed of the electrical impulses to make them transmit quickly
what are muscle cells
these cells are able to contract (get shorter) and relax (return to original length) to help us move
what are the three types of muscle cells
cardiac, smooth and skeletal muscle
what does the cardiac muscle do
contract and relax to pump blood
what does the smooth muscle do
makes up thin sheets of muscle such as stomach lining
what does the skeletal muscle do
joined to bones and makes bones move and joints bend
