Unit 4 Lesson 9 Flashcards
Cellular metabolism
Involved many types of chemical reactions that occur in a specific sequence to sustain life
Cellular respiration
A set of metabolic reactions and processes that take place in the cells to change nutrients into energy in the form of ATO and to release waste products
Diffusion
The movement of substances across the cell membrane from an area of high concentration to an area of low concentration until the concentration on both sides becomes equal
Diploid cells
Cells that have two pairs of chromosomes
DNA (or deoxyribonucleic acid)
The genetic material that’s contained in the nucleus
Haploid cells
Cells that have only a single set of chromosomes
Meiosis
The process by which gametes replicate
Mitosis
The process by which cells replicate — a predictable patter with two phases: 1) interphase 2) mitotic phase
Modern cell theory
States that 1) all loving things are composed of one or more cells, 2) the cell is the basic unit of life, and 3) new cells arise from pre-existing cells
Negative feedback mechanisms
Inhibitory mechanisms that work to stop the change that has occurred
Nucleus
The control center of the cell
Osmosis
The movement of water through a semi-permeable membrane in order to maintain the volume of fluid in the cell
Positive feedback mechanisms
Simultaneous mechanisms that work to amplify or reinforce the change that has occurred
Stressor
Anything that disrupts the homeostasis of the internal environment
