BIO 4426 Lecture Notes - Lecture 1: White Adipose Tissue, Adipose Tissue, Basal Lamina
Document Summary
Energy storage in the form of triglycerides. Adipose, along with cartilage, bone, blood and the circulatory and lymphatic systems, is considered specialized connective tissue. There are two types: white adipose and brown adipose tissue (brown fat). Chylomicrons, very low-density lipoproteins (vldls), and free fatty acids synthesized within the cell from glucose are sources of stored triglycerides. Hormonal or neural signals stimulate adipocytes to hydrolyze triglycerides and release. Usually contain one fat droplet and a small, eccentrically placed nucleus. Cytoplasm appears clear on tissue sections because fat is dissolved during processing. Each adipocyte surrounded by a thin basal lamina. Adipocyte groups of variable size are partially surrounded by vascularized connective tissue. free fatty acids. Norepinephrine released by sympathetic nerves in adipose tissue activates hormone-sensitive lipase. Synthesize leptin, a hormone that acts on the hypothalamus to regulate appetite. Synthesize angiotensin (increased production contributes to hypertension) Appears yellow-brown due to large numbers of mitochondria. Cells receive direct innervation from the sympathetic nervous system.
