The change in hair color occurs when melanin ceases to be produced in the hair root and new hairs grow in without pigment. The stem cells at the base of hair follicles produce melanocytes, the cells that produce and store pigment in hair and skin. The death of the melanocyte stem cells causes the onset of graying.
The revenue cycle is a recurring set of business activities and related information processing operations associated with providing goods and services to customers and collecting their cash payments.The primary external exchange of information is with customers.he revenue cycle is a recurring set of business activities and related information processing operations associated with providing goods and services to customers and collecting their cash payments.
1 This set of sequential, interrelated activities is known as the sales cycle, or revenue cycle. 2  Purchasing cycle. 3  A company issues a purchase order to a supplier for goods, receives the goods, records an account payable, and pays the supplier. A company receives an order from a customer, examines the order for creditworthiness, ships goods or provides services to the customer, issues an invoice, and collects payment. 2  This set of sequential, interrelated activities is known as the sales cycle, or revenue cycle. 3  Purchasing cycle.