Sensory and Motor Signals to the Arms Are Sent Through

question 22

Multiple Choice

Sensory and motor signals to the arms are sent through _____ sections of the spinal cord.

• A)sacral
• B)thoracic
• C)lumbar
• D)cervical

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Definitions:

Choanoflagellates

A group of free-living unicellular and colonial flagellate eukaryotes considered to be the closest living relatives of animals.

Ribbon Worms

A group of soft-bodied, often very long and slender invertebrates belonging to the phylum Nemertea.

Flatworms

A phylum of simple, bilaterally symmetrical, unsegmented invertebrates with a flattened body, including planarians, flukes, and tapeworms.

Acoelomates

Animals without a coelom, or body cavity, between the digestive tract and the outer body wall, including flatworms.