MCB 150 Lecture Notes - Lecture 8: Loose Connective Tissue, Cholecalciferol, Subcutaneous Tissue

• School: University of Illinois
• Department: Molecular and Cell Biology
• Course: MCB 150
• Professor: B Mehrtens

Document Summary

Know the significance of dermal cleavage lines (tension lines) and how they contribute to scarring and stretch marks. Identify the orientation or predominant collagen fibers. Surgery cuts should be planned parallel to these lines to ensure rapid healing and minimal scarring. When collagen fibers are stretched beyond its capacity and repair, creates stretch marks, also known as striae: what is the function of the hypodermis. Consists of areolar connective tissue and adipose connective tissue. Provides thermal insulation, energy storage, this layer also pads and protects the body. Drugs usually injected here because fast absorption: functions of the integument, know how the skin provides both a physical protective barrier as well as a barrier to fluid gains/losses. Protects against injury, trauma, chemicals, radiations etc. Prevents dehydration (fluid loss) and excessive fluid intake (like a sponge: know the general location for the production of vitamin d 3 (cholecalciferol) and what environmental exposure is required for it.