The answer is; Sodium (Na+) and Potassium (K+) Ions
These cations are pumped out of the cell by Na+-K+ transmembrane protein pumps leaving the inside of the cell electronegative in relation to the extracellular matrix. This membrane potential is significant especially for neurons. Depolarization of the membrane enables transmissions of an impulse along the neurons. 
 
        
             
        
        
        
options:
a) noninvasive
b) precise
c) inexpensive
d) easy
Answer:b) precise
Explanation: BMI(BODY MASS INDEX) is a very vital measurement tool for evaluating and the determining the level of Obesity of overweight of a person.
Body mass index is noninvasive, it is inexpensive and easy way of knowing how well the body weight and height is related to a person's well being.
It is calculated as follows; WEIGHT(KILOGRAMS)/SQUARE OF THE HEIGHT(METERS)
 
        
             
        
        
        
Answer:
I think B and D
Explanation:
A moraine is a mass of rocks and sediment carried down and deposited by a glacier, typically as ridges at its edges or extremity.
 
        
             
        
        
        
P<span>atients who cannot afford to purchase bone marrow will have to wait for voluntary donors.</span>
        
             
        
        
        
Answer:
In addition to altering plant communities, the study predicts climate change will change the ecological balance between interdependent and often endangered plant and animal species, reduce biodiversity and adversely affect Earth's water, energy, carbon, and other element cycles.
Explanation:
i hope this helps