Bio 3421 Exam 1 (TXST)-Davenport 157 Exam Study Guide Questions with Correct Answers Characteristics of living things - Correct Answer -Be able to reproduce -Have cells -Be able to respond to stimuli -Obtain energy -Evolve -Homeostasis What is physiology? - Correct Answer The study of the processes or functions of organisms and how living things work Basics on levels of organization - Correct Answer Molecules--> cells--> tissues --> organs --> systems-- >organisms Homeostasis - Correct Answer Living things maintain this, process by which an organism maintains equilibrium or internal consistency Negative feedback - Correct Answer -Main regulatory mechanism for homeostasis -Occurs when a change in a variable triggers a response that opposes the change -Minor change causes correction Ex-Blood pressure gets too high, this brings it back to normal Feedforward control - Correct Answer Anticipation, not outside normal yet... but thinks it will become abnormal Ex-Smelling food, digestive system is activated Biology - Correct Answer Scientific study of living things Positive feedback - Correct Answer Signaling needed less, less common, continues to move in the direction of change, occurs when rapid change is needed Ex-Birth of a mammal, fetus puts pressure on uterus & makes oxytocin, which increases contractions 1 / 2
Molecules - Correct Answer Assemble into cell structures, regulate cell functions, & catalyze cell rxns Tissue - Correct Answer Group of cells with similar structures and functions.
4 main types: epithelial, connective, muscular and nervous
Organ - Correct Answer 2 or more types of tissue organized to perform a particular function Cell - Correct Answer Smallest units capable of carrying out the processes of life Whole-body control systems - Correct Answer Nervous & endocrine Nervous system - Correct Answer For activities requiring swift responses, detect external environment changes, learning, memory and consciousness Endocrine system (Hormones) - Correct Answer Activities that require duration rather than speed, controls reproductive cycles Support & movement system - Correct Answer Muscular, enables movement Maintenance systems - Correct Answer Circulatory, respiratory, immune, excretory Circulatory system - Correct Answer Transports nutrients, gases, & hormones around the body Respiratory system - Correct Answer Gas exchange, maintains proper pH Excretory system - Correct Answer Removes excess water, salts, acids, & wastes Reproductive system - Correct Answer -Produces gametes -Delivers gametes -Produces milk
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