and Obesity Exam 1 2026
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Plasma membrane - ANSWER ✔✔Barrier from the external
environment
Protects internal organelles
Semipermeable which selectively allows substances in and out.
Many medications disrupt the plasma membrane.
Glycoproteins - ANSWER ✔✔On top of plasma membrane.
Surface makers
Antigen
, sodium-potassium pump - ANSWER ✔✔Within the wall of the plasma
membrane
Pushes sodium and potassium in and out of cell.
Need to have energy for pump to work.
Pump working= Sodium ions in higher concentrations outside
Pump working=Potassium ions higher concentrations inside the cell
Switch when the pump isn't working
Sodium potassium pump broken.... - ANSWER ✔✔Does not allow for
contraction of muscles which can cause heart attack.
Sodium ions when pump working - ANSWER ✔✔Sodium ions higher
concentration outside of cell
Potassium ions when pump is working - ANSWER ✔✔Potassium
ions higher concentration inside the cell
Mitochondria - ANSWER ✔✔Cells energy producer
Aerobic metabolism requires oxygen
Cellular hypoxia= anaerobic metabolism (glycolysis)
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