Practice Exam questions Flashcards
Hyperpolarization during an action potential is due to
an efflux of potassium
phospholipase C activation
splits PIP2 a membrane phospholipid
Dilution technique:
What substance remians in the bloodstream and cannot pass through the capillary boundary?
albumin
Dilution technique:
What substance would you use to measure interstitial fluid?
inulin, note: you must initially find the amount of plasma fluid before you do this part
Dilution technique:
What substance would you use to measure intracellular volume?
doubly labeled HOH, note: you must do the dilution technique for plasma and interstitial fluid first
Continuous conduction
depolarizes and repolarizes the entire length of the axonal cell membrane to the axon terminal
Is actin bound to tropomyosin?
NO! It is bound to troponin.
Latency in a twitch is due to
Na+ has to diffuse into the cell
voltage gated Ca++ channels to open, and Ca++ to bind troponin
Voltage regulated Na channels are located
in the sarcolemma and Axonal hillock
Phosphodiesterase causes
decreases second messenger production
Are ryanodine receptors voltage sensitive?
no
glycocalyx
glycoproteins and glycolipids
Voltage regulated Ca++ channels are found
in the axon terminal and the sarcolemma
Oxygen debt
refers to reclaiming ATP from the buildup of lactic acid
IP3
causes Ca++ to be released from the ER
