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Bio Lecture Exam 3.3

Chapter 20 Concepts

QuestionAnswer
Hierarchy of Animal Organizational Structures Cells-tissues-organs-organ systems
Cell Smallest unit of organization in all organisms (muscle cell)
Tissue Group of cells that share similar structure and function (smooth muscle tissue)
Organ Group of tissues that perform specialized functions (stomach)
Organ System Group of organs that work together to accomplish functions (digestive system)
Connective Tissue Composed of cells embedded in a matrix, which together contribute to body structure and support
Epithelial Tissue Covers and lines most exterior and interior surfaces of the body
Muscle Tissue Enables movement; made up of cells that can contract
Nervous Tissue Sends and receives electrical and chemical signals
Digestive System Disassembles and absorbs food
Circulatory System Transports gases, nutrients, waste, etc thru body
Respiratory System Gas exchange between external environment and circulatory system
Immune and Lymphatic System Attack pathogens, recycles fluid
Urinary/Excretory System Purifies blood by filtering out waste
Homeostasis The body's use of physical and chemical processes to maintain a consistent internal environment
Regulators vs. Conformers Regulate - maintain homeostasis for a certain variable Conform - the variable may fluctuate with external changes
Endotherms Generate body heat internally
Ectotherms Get heat from environment
Homeotherms Body temps relatively constant
Heterotherms Body temp fluctuates as environment temp changes
4 Mechanisms of Heat Exchange 1. Conduction 2. Convection 3. Radiation 4. Evaporation
4 Methods by Which Animals Regulate Body Temp 1. Physical Methods 2. Behavioral Methods 3. Physical Methods 4. Cellular Methods
Osmoregulation The regulation of water content and dissolved solute concentrations by balancing water gain and loss
How Human Kidney Works 1. Filtration 2. Reabsorption 3. Secretion
Created by: whaleydrew
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