Answer to Question 1
The glycogen stored in the liver provides a reserve supply of the body's sugar, glucose, and thus can sustain cell activities if intervals between meals become so long that glucose absorbed from ingested foods is used up. When the body is depending solely on liver glycogen, however, the supply is used up within three to six hours. Similarly, fat cells store reserves of fat, the body's other principal energy nutrient. Unlike the liver, however, fat cells have virtually infinite storage capacity and can continue to supply fat for days, weeks, or even months when no food is eaten.
Answer to Question 2
Endocrine is a term to describe a gland secreting or a hormone being secreted into the blood.
Example: The pancreas secretes the hormones insulin and glucagon into the blood.
Exocrine describes glands that secrete chemical messengers through a duct into a body cavity or onto the surface of the skin; exo means out..
Example: Bicarbonate and digestive enzymes are secreted by the pancreas into the duodenum.
Why your body loves sleep
Disorders of the Respiratory System
Conducting system of the heart.
The urinary system.
(a) Blue arrows (right side): External components of the innate immune system: human body with skin, ...
Good body mechanics when facing the table directly. A. Head and back in alignment. B. Legs and feet ...