Exam 24: Communication I: Nervous and Sensory Systems

Among the metazoa,all photoreceptors involve the presence of

The junction between the axon of one neuron and the dendrites of the next neuron is called the

The pigment in rods that absorbs light is

Motor neurons comprising the __________ nervous system relay commands to skeletal muscles.

The enteric division of the autonomic nervous system controls activity of __________ muscle that produces peristalsis.

Using the __________,fishes can detect direction and force of water currents and the movement of other animals in the water.

The median eye of reptiles allows

The nervous system of the cnidarians is a(n)__________.

The __________ component of the autonomic nervous system arises from the brain and from the sacral region of the spinal cord.

Chemical compounds that organisms use for intraspecific communication (communication between members of the same species)are called

Among the vertebrates,the tympanum first evolved in the

The type of ion present in higher concentrations inside the plasma membrane of a "resting" neuron is

The protective membranes around the spinal cord are called the

The __________ regulates body temperature,sexual drive,carbohydrate metabolism,hunger,and thirst.

The white matter of the spinal cord gets its name because it is made up of fibers covered with a material which has a whitish color,referred to as

After dark,the majority of light sensing in the retina is by __________ which do not differentiate colors.