Motor Neurons 1 and 2 Start Out Innervating the Same

question 2

Multiple Choice

Motor neurons 1 and 2 start out innervating the same number of muscle fibers in a neonatal mouse. If motor neuron 1 releases more acetylcholine in the first two weeks postpartum, ultimately:

• A) motor neuron 1 will innervate more muscle fibers.
• B) motor neuron 1 will have a thicker axon.
• C) motor neuron 1 will be activated prior to motor neuron 2 during muscle contraction.
• D) a and b
• E) a, b, and c

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Definitions:

Expansion Theory

The idea that territories and nations should expand their dominion for economic gain, security, or national prestige.

Cold War

A period of geopolitical tension between the Soviet Union and the United States and their respective allies, characterized by threats, propaganda, and other measures short of open warfare, from about 1947 to 1991.

North Atlantic Treaty Organization

A military alliance formed in 1949 by countries in North America and Europe to provide collective security against aggression.

NATO

The North Atlantic Treaty Organization, a military alliance established in 1949 for mutual defense against aggression, comprising member countries from Europe and North America.