Exam 4: Ch. 49 lecture 11

Term

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Nervous systems consist of circuits of ________ and _________ cells.

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Terms in this set (19)

Nervous systems consist of circuits of ________ and _________ cells.

neurons; supporting

unicellular organisms

Can detect changed in environment and respond in ways that survival and reproductive success

multicellular organisms

evolved from simple recognition and response processes with
mechanisms for communication between all body cells

Possess series of interconnected nerve cells which form diffuse nerve net

controls contraction and expansion of gastrovascular cavity

Bilaterally symmetrical animals

-More specialized nervous systems
o Neuron axons bundled into nerves
o Exhibit cephalization

Clustering of sensory neurons and interneurons at anterior
end

Non-segmented worms (e.g. planarian)

Small brain and longitudinal nerve cords make
up simplest clearly defined central nervous system (CNS)

Nervous system organization correlates with __________.

_________ or sessile animals have relatively simple sense organs and little
or no cephalization