The inorganic portion of the matrix is composed of ______ and the organic is composed of _______

A. difficulty absorbing nutrients from the intestine
This is related to gastrointestinal function, not brown fat. Brown fat is involved in thermoregulation, not nutrient absorption.

B. difficulty regulating his body temperature
Brown fat is specialized for non-shivering thermogenesis, particularly in newborns. Without it, the infant would struggle to generate body heat and maintain a stable temperature.

C. very stretchy tendons and skin
This suggests a connective tissue disorder like Ehlers-Danlos syndrome, not a defect in brown fat.

D. a reduced bone mass
Brown fat does not directly influence bone development or bone mass.

E. difficulty breathing
Respiratory function may be affected in other conditions, but brown fat deficiency does not directly impair breathing mechanics.

A. circumferential lamellae
These are outer and inner rings that encircle the entire compact bone structure, not the rings within an osteon.

B. concentric lamellae
These are the circular layers of bone matrix surrounding the central (Haversian) canal within each osteon.

C. interstitial lamellae
These are incomplete lamellae found between osteons, representing old osteons that have been partially resorbed.

D. sequential lamellae
This is not a valid anatomical term used to describe lamellae in bone.