Answer:
B. Glucagon released by the pancreas causes liver cells to release glucose into the blood
Step-by-step explanation:
Statement B is correct. Glucagon is a hormone released by the pancreas that acts to increase blood glucose levels. When blood glucose levels are low, such as during periods of fasting or prolonged exercise, glucagon signals the liver cells to convert stored glycogen into glucose and release it into the bloodstream. This helps to maintain a steady supply of glucose for cells throughout the body, preventing them from getting too little glucose.
Insulin (A) actually acts to lower blood glucose levels by facilitating the uptake of glucose into cells and promoting the conversion of glucose into glycogen for storage. Cortisol (C) is a stress hormone released by the adrenal glands that regulates various physiological processes but does not directly affect glucose distribution. Adrenaline (D) is also a stress hormone that increases heart rate and blood flow, but it does not play a direct role in regulating glucose distribution in the body.