Simplify the following text for a Grade 11 native English-speaking person.
Original: Many disease processes , such as diabetes , heart disease , autoimmunity , and cancer arise from defects in signal transduction pathways , further highlighting the critical importance of signal transduction to biology , as well as medicine .
Simplified: Many disease processes such as diabetes , heart disease , autoimmunity and cancer arise from defects in signal transduction pathways . This highlights the critical importance of signal transduction to biology and medicine .