Answer:
This is True.
Explanation:
Biologists use the fluid mosaic model to describe membrane structure. The framework of a membrane is a bilayer of phospholipids with their hydrophilic heads facing the aqueous environment inside and outside of the cell and their hydrophobic tails clustered in the center.
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Answer: (BRAINLIEST PLAESE) given strand of DNA is CGTAT and its complementary strand will be GCATA
Explanation:
I think it’s the second option. There is a ph scale attached below to explain this. Hope it helps.
try looking it up on the app instead of asking you get the answer faster
Answer:
B is INCORRECT
Explanation:
Action potential in contractile cells can be divided into 3 phases
1. Rapid depolarization; caused by fast influx of sodium ions into the cells. Last a few milliseconds.
2. Plateau phase: This is a sustained positive membrane potential, after rapid depolarization, caused by a balance between calcium ion influx and slow potassium ion efflux.
3. Rapid repolarization: Eventually there's a closure of all other ion channels except the potassium ion channels causing rapid efflux of potassium ions, returning the membrane potential back to negative.
A refractory period usually occurs after undergoing an action potential. During this time no action potential can occur.
