Bio 3421 Exam 1 (TXST)-Davenport 157 Exam Study Guide Questions with Correct Answers

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