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​The first day of the monthly menstrual cycle begins with ____.

The second round of meiosis in the testes produces ____.​

Tubular secretion takes place in the ____.​

Animal fats such as the fat in butter, meats, and cheese are rich in ____.​

Hair cells of the inner ear begin to show damage when exposed to sound louder than ____.​

The cause of infant respiratory distress syndrome is a lack of ____.​

Fats that are manufactured from vegetable oils found in many processed food are known as ____.​

The major nerve that controls inspiratory activity is the ____.​

​Which pair of hormones influences the urinary system’s ability to manage salt retention?

​Which cells are found in lymph nodes to clear away bacteria and other unwanted substances?