C. Physical or emotional abuse.
<span>Hi,
Insulin </span><span>allows glucose to be transported across cell membranes for use within the cell.
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Artificial methods in common use include preventing the sperm from reaching the ovum (using condoms, diaphragms, etc), inhibiting ovulation (using oral contraceptive pills), preventing implantation (using intrauterine devices), killing the sperm (using spermicides)
