| A | B |
|---|
| What are the two coordination systems which almost all animals have? | the nervous system and the enodcrine system |
| What are the steps of the nervous system | capture the signals from sense orgrans, interpret them, give orders to carry out coordinated responses, communicate these orders to the effector organs |
| The basic cell unit of the nervous system is called _____________ | a neuron |
| Are neurons connected to each other? | yes |
| Do neurons touch one another? | no |
| What do we call this connection of non-touching neurons? | "communications network" of neurons which extends throughout an animal´s body |
| What do we call cells specialized in transmitting information? | neurons |
| What do we call the electric signals t hat neurons transmit? | nerve impulses |
| Give an example of an animal that uses a simple network of neurons | a jellyfish, a polyps (cnidaria) |
| Give an example of an animal that has a nerve system and where it´s located? | ganglia of molluscs and arthropods, the encephalon and the spinal cord in vertebrates |
| Jellyfish and polyps just have | a simple nework of neurons |
| In more complex aminals, such as molluscs and arthropods, or vertebrates neurons are grouped together to form | nerve centres, and nerves |
| What do nerve centres do? | They process the informations |
| What do nerves do? | They connect the sense organs to the nerve centres and the nerve centres to the effectors |
| What system produces hormones? | The endocrine system |
| What do hormones do? | They travel round the organism provoking responses, generally slow and lasting, in certain effectors. |
| What is the endocrine system made of? | certain organs or groups of cells called endocrine glands |
| What activates the production of a hormone in a gland? | an order (impulse) from the nervous system, or by variations in the levels of certain substances in the organism. |
| Give an example of a response coordinated by hormones | metamorphosis, the reproductive cycles, growth |
| The neuron receives a nerve impulse in the ____________ | dendrite |
| Where the impulse runs along the neuron | the axon |
| Where the nearuon releases neurotransmitters which transmit the impulse to the next neuron | dendrite |
| Name the two parts of the nervous system in a mollusc | ganglia and nerves |
| Name the components of a nervous system in a vertebrate | spinal cord, brain, neurons |
