The Normal Myeloid-To-Erythroid Ratio in a Bone Marrow Aspirate from a Normal

question 1

Multiple Choice

The normal myeloid-to-erythroid ratio in a bone marrow aspirate from a normal adult is approximately:

• A) 1:1
• B) 2:1
• C) 4:1
• D) 6:1
• E) None of the above

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Definitions:

Extinction

The process whereby a conditioned response decreases in frequency and eventually disappears as a result of the conditioned stimulus being presented without the unconditioned stimulus.

Reinforcement

A stimulus or event that increases the likelihood of a behavior being repeated, it can be positive (adding) or negative (removing).

Shaping

Shaping is a method of training by which successive approximations toward a desired behavior are reinforced.

Primary Reinforcement

A reinforcer that satisfies a basic biological need or desire, such as food, water, or sleep, which is inherently motivating.