KINE 2P84 Lecture Notes - Lecture 5: Bone Mineral, Bioelectrical Impedance Analysis, Dual-Energy X-Ray Absorptiometry
8 May 2018
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KINE 2P84 Growth and Development
White adipose tissue >99%
- Cell: single droplet
- Tissue
o Lobules
o Innervated
o Vascularized
o Throughout body
Brown adipose tissue <1%
- Small droplets
- Central nuclease
- A lot of mitochondria, lots of ATP production
- Increased hemoglobin
- Distribution
- Well innervated
- Highly vascularized
- Increase as we get older
- Function
o Non-shivering thermogenesis
▪ In a cold environment, in winter
o Related to muscle volume (adolescence)
o Related to bone mass (childhood)
White adipose tissue – postnatally
- Boys = girls
- 14 weeks – appear in abdomen
- 23 weeks – increased number of adipocytes
- increased vascularization
- birth - ~ 5 billion adipocytes
o mostly small (<adult)
o important for transition
- Adult: ~30-50 billion adipocytes
- ~ 80-100um
- 10-14 kg
hypertrophy
hyperplasia
hypertrophy + hyperplasia
atrophy; with weight loss
Fat cell size during growth
- hypertrophy in first year
- hypertrophy during puberty
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Document Summary
A lot of mitochondria, lots of atp production. Increase as we get older: non-shivering thermogenesis. In a cold environment, in winter: related to muscle volume (adolescence, related to bone mass (childhood) 23 weeks increased number of adipocytes. Birth - ~ 5 billion adipocytes: mostly small ( water > fat: >1. 1, 1. 0, 0. 9007 f/cm^3 if density <1 float if density >1 sink the higher the density the lower the fat.
