BIOL 117 Chapter 11: BIOL 117 Chapter 11 Chapter 11_ Notes
Document Summary
Pre-background: cellular messaging: chells can signal to each other and interpret the signals they receive from other cells and the environment, the signals may include light and touch, but are most often chemicals. In studying cell communication, biologists have discovered ample evidence for the evolutionary relatedness of all life: apoptosis- a mechanism of programmed cell death that integrates input from multiple signaling pathways. Concept 11. 1: external signals are converted to responses within the cell, cells communicate about sex, there are two types of mating types, called a and a. Each type secretes a specific factor that binds only to receptors on the other type of cell: communication between mating yeast cells, exchange of mating factors: Signaling (a nerve cell releases neurotransmitter molecules into a synapse, stimulating the target cell. : long-distance signaling includes hormonal signaling (specialized endocrine cells secrete hormones into body fluids, often the blood.
