General
5 notes
Notes 5
Nerve Membrane
The cell membrane is a phospholipid bilayer. Because its core is hydrophobic, charged ions cannot freely cross it and require specific membrane proteins.
Cell
The plasma membrane is a fluid phospholipid bilayer that separates the intracellular and extracellular environments and selectively controls movement of substances.
Body Fluids
FCPS pearl: TBW percentage depends on age, sex and body composition, so the 60% rule is an approximation, not a universal value.
Muscle
Whole muscle → fascicles → muscle fibres → myofibrils → myofilaments. The collagen fibres of these coverings blend with tendon collagen, transmitting muscle force to bone.
