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bija089 [108]
3 years ago
12

Please help, thank you so much.

Social Studies
1 answer:
elixir [45]3 years ago
3 0

5A - the steel plow

The steel plow allowed farmers to plant their crops as it helped them break up the hard soil easier.

6B - Sod had to be broken to prepare fields for crops.

On the plains, the soil was very hard and covered with soil. Origianl plows had a difficut time breaking through the sod - the steel plow allowed for easier farming for the settlers.

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Peripheral Nervous System

The peripheral nervous system is made up of thick bundles of axons, called nerves, carrying messages back and forth between the CNS and the muscles, organs, and senses in the periphery of the body (i.e., everything outside the CNS). The PNS has two major subdivisions: the somatic nervous system and the autonomic nervous system.

The somatic nervous system is associated with activities traditionally thought of as conscious or voluntary. It is involved in the relay of sensory and motor information to and from the CNS; therefore, it consists of motor neurons and sensory neurons. Motor neurons, carrying instructions from the CNS to the muscles, are efferent fibers (efferent means “moving away from”). Sensory neurons, carrying sensory information to the CNS, are afferent fibers (afferent means “moving toward”). Each nerve is basically a two-way superhighway, containing thousands of axons, both efferent and afferent.


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