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.
Answer: A
explanation(from a website)
Stay calm. ...
Remove the stinger. ...
Wash the sting with soap and water.
Apply a cold pack to reduce swelling. ...
Consider taking over-the-counter pain medication.
Answer:
4 genetically different haploid cells
Explanation:
meiosis gives rise to four unique daughter cells, each of which has half the number of chromosomes as the parent cell.
Answer:
Nucleic acid would be the answer.
Explanation:
Nucleic acids store genetic information, while proteins build bone and muscle, carbohydrates are a quick source of energy, and lipids are essential to the development of the nervous system and hormones
