In which phase heart will have more negative charge?options :a)repolarizationb)depolarisation c)refractory per

Question

options :
a)repolarization
b)depolarisation
c)refractory per
d)hyper polarizaton
why?

Answer 1

When a "typical cardiac cell" is at it's resting potential it is at approximately -70 mV (ish), with the inside of the cell being negative relative to the outside. When the cell depolarizes, the membrane voltage goes to about + 40 mV (ish). Repolarization then begins and the cell gets ready to "fire" again. However, the cell will tend to "undershoot" the resting membrane potential (-70mV). This "undershoot" is when the membrane potential is hyperpolarized relative to the resting potential and can reach about -80mV (ish). So, the answer is D. Go to the link below for a nice little graph of the whole process. Hope this helps.

Answer 2

lmao that's hilarious. When I first came I liked a lot of pop punk/indie and some classic rock(this was when I was 12 or 13). As I spent more time on R&P, I expanded my taste to some metal, punk, more classic rock, etc and stopped liking pop punk. I never went through stages 1-3, 5, or 6 but I've seen SO many people that do. I guess some people go through the obnoxious stages and some are still forming their opinions and finding new music. Hilarious question Mia, props =)

Answer 3

Dude, just seeing a question about action potentials gives me nightmares. Had teacher that probably rubbed a chub to a graph of various A.P.'s. But like everyone said, the answer is D) hyperpolarization

Answer 4

C- depolarisation is the period during which ECG shows negative waves. Repolarisation renders waves positive.

Answer 5

the answer is D HPERPOLARIZATION