Compare and contrast the organization of invertebrate and vertebrate nervous systems. What will be an ideal response?
Concepts to Consider: Invertebrate nervous systems: Cnidarians have a nerve net and no brain, but
system allows organism to respond to threats from all directions. Echinoderms have a radial nervous
system that is a modified nerve net. They too have no brain. Platyhelminthes (flatworms) are the first
animals to have a primitive brain, two solid, ventral, longitudinal nerve cords arranged in a ladder-like
system. Annelids and arthropods have a brain and a solid nerve cords. Cephalopods have a brain and
solid nerve cords. This brain has lobes, sulci, and specialized regions similar to vertebrate brain.
Vertebrate nervous systems: have a brain with specialized regions; dorsal, hollow nerve cord. System
is divided into central and peripheral nervous systems.
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The main center for homeostatic control of the internal environment is the ____
a. pons b. medulla oblongata c. hypothalamus d. thalamus e. cerebellum
Select the molecule that contains the most stored chemical energy:a
ethyl alcohol. b. water. c. carbon dioxide. d. lactate. e. oxygen.
Limiting factors (i.e. disease, starvation, or drought) determine the _____________ of a given population.
A. ecological footprint B. reproductive barriers C. evolutionary tree D. fossil record E. carrying capacity
While driving down the interstate at rush hour, you get cut off by an 18-wheeler and have to slam on the brakes. In addition to a major case of road rage, you also develop a rapid heart rate and breathing rate. What caused this increase? (Indicate the
branch of the nervous system and neurotransmitters.) What is happening to your digestion at this point? What will be an ideal response?