There is three types of neurons occur. Sensory neurons typically have a long denfrite and short axon, and carry messages from sensory repeptprs to the central nervous system. Motor neurons have a long axon and short dendrites and teansmit messages from the central nervous system to the muscles.
For the first question, I would say a line graph. And the one about the human heart, I need some more information.
Increase and decrease in oestrogen and progesterone.
