KINE 2P84 Lecture Notes - Lecture 4: Angiotensin, Lipid Metabolism, Adipocyte
8 May 2018
School
Department
Course
Professor
KINE 2P84 Growth and Development
Muscle Strength – takes size out of the equation
Motor Unit Activation – increases with growth
Muscle Fibre Size
- Postnatal hypertrophy
- Increases diameter with growth
o Infancy adolescence/adulthood
- Decreases diameters with aging
o Middle age
- Increase size, increase nuclei/fibre
o Boys: x4, girls: x10
- Increases number sarcomeres/fibre
- Increases sarcomere length
o Implication: force and speed of contraction
Muscle Mass
- Number of fibres
- Increases fibre size
- Increases # of nuclei/fibre
- Increases muscle mass
- Absolutely vs. proportionately
Adipose Tissue, Body Composition
General Overview
- Increase in fat mass with growth
o Girls > boys
- Childhood obesity epidemic
- Metabolic properties of fat tissue
- Fatness and fat distribution
o Changes with growth
Adipocyte
- Fat depots – large number of fat cells held together by structural molecules
- Nerves and blood vessels – abundant
Functions of Fat tissue
- Energy storage
- Insulation
- Mechanical protection
- Regulation of biological function
o Endocrine
o Paracrine
find more resources at oneclass.com
find more resources at oneclass.com
