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Alicia Kyla Sajor

Physiology Studystack Week 1-3 SCI221

QuestionAnswer
Homeostasis The body’s ability to keep a stable internal environment even when the outside world changes.
What is the main goal of homeostasis? To keep the body’s internal conditions, like temperature and pH, within a normal range for cell function.
The three parts of a feedback loop are the ________, ________, and ________. receptor (sensor), control center, effector
What is negative feedback? A process that reverses a change to maintain balance, such as lowering body temperature after a fever.
What is positive feedback? A process that increases a change, like stronger contractions during childbirth.
DNA (Deoxyribonucleic acid) The molecule that holds genetic information used to make proteins and control cell activities.
What is the shape of the DNA molecule? A double helix that looks like a twisted ladder.
The four DNA bases are _______, _______, _______, and _______. adenine, thymine, cytosine, guanine
Where is DNA found in a cell? Inside the nucleus.
What is a gene? A small section of DNA that carries instructions for making one specific protein.
Created by: sajoralicia
 



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