A major function of this mucus is to protect against infectious agents such as fungi, bacteria and viruses. The average human body produces about a litre of mucus per day. Bony fish, hagfish, snails, slugs, and some other invertebrates also produce external mucus.n vertebrates, mucus (/mjuËkÉs/ MYOO-kÉss; adjectival form : mucous) is a slippery secretion produced by, and covering, mucous membranes. Mucous fluid is typically produced from cells found in mucous glands.
The basic structure of an IF statement in an Excel formula is: =IF(Condition, Value if condition is true, Value if condition is false). After testing the condition, Excel returns either one of the two supplied values, based on whether the condition evaluated to true or false.ultiple IF Statements. Multiple IF statements let you evaluate a condition that has more than two possible outcomes. To create a multiple IF statement, replace the value returned if the condition is evaluated to false in the first statement by a second IF statement, enclosed in its own set of parentheses.
IF Statements in Formulas in Microsoft Excel. A simple example of an IF statement is giving grades for percentages. Well assume that our percentage is in cell A2, and our formula resides in cell B2. An IF statement has at least 3 parts called arguments. When you type an IF statement, the tool tip automatically appears to tell you the 3 arguments required. The first part of the IF statement is called a logical test, which is also often referred to as a condition. Tip. Note that all text is surrounded by quotes when used in formulas. There are a few exceptions, such as True and False.