At What Age Is It Normal for Bone Marrow Cellularity

question 13

Multiple Choice

At what age is it normal for bone marrow cellularity to be 80% to 90% (i.e., has very little fat) ?

• A) At birth
• B) In an 8 year old
• C) In a 20 to 40 year old
• D) In those older than 70 years

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Definitions:

Immediate Gratification

The desire to experience pleasure or fulfillment without delay or deferment.

Basic Drives

Fundamental biological impulses that drive behavior, such as hunger, thirst, and the need for sleep.

Id

In psychoanalytic theory, the part of the psyche that is the source of instinctive impulses and demands for immediate satisfaction of primal needs.

Ego

In psychoanalytic theory, the part of the personality that mediates between the demands of the id, superego, and reality.