Riding a bicycle requires balance and constant adjustment and monitoring by the rider in order to continue cycling. successful riding a bicycle most directly results from the ability to:
a) grow and develop
b) metabolize food for energy
c) sexually reproduce
d) detect and respond to change

the glands which are associated with each description is given below:

pancreas - is an endocrine and exocrine gland that secretes juices with enzymes for digestion. salivary glands- with protection and digestion in the mouth. liver- secretes bile for digestion.   lachrymal glands - secrete tears to moisten eyes and protect them from particles and infection.   sweat gland -regulates water, salt, and temperature. oil glands - to form a protective barrier on the skin.   goblet cells - secrete mucus for protection.