Question

Biology:

a.) Which electrolytes stimulates muscle cells to contract?

a. phosphorus

b. sodium

c. chloride

d. calcium

b.) Who would be most at risk for dehydration?

a. athletes and elderly

b. infants and elderly

c. adolescents and elderly

d. infants and athletes

Answer 1

Electrolyte that helps in muscle contraction is:

CALCIUM - Calcium ions play on important role in muscle contraction by creating an interaction between the proteins, myosin and actin. The calcium ions bind to the C component of the actin filament, which exposes the binding site for the myosin head to bind, inorder to stimulate muscle contraction.

Who is at more risk for dehydration?

Infants and elderly

Infants lose more fluids when they are feverish, and as their surface area to volume is more they can lose more water, and the most common cause will be vomiting and diarrhea. Whereas elderl hold 15% less water than young adults. Both population can have additional risk factors such as communication barrier, chronic illnesses.