Cells & Cell Theory
Scientists use this theory to explain that cells are the basic unit of life.
What is cell theory?
This organelle contains the DNA that provides instructions for many of the cell's activities.
What is the nucleus?
This term describes an organism keeping its internal conditions relatively stable.
What is homeostasis?
This type of transport moves substances across the cell membrane without requiring cellular energy.
What is passive transport?
This stage of the cell cycle includes cell growth and preparation for cell division.
What is interphase?
This type of cell does not have a nucleus surrounded by a membrane.
What is a prokaryotic cell?
These tiny structures read instructions and assemble amino acids into proteins.
What are ribosomes?
When your body temperature rises, your body produces sweat to cool itself. What process is being maintained?
What is homeostasis?
A substance moves from an area where it is more concentrated to an area where it is less concentrated. What process is this?
What is diffusion?
Before mitosis begins, a cell must make an extra copy of this molecule so each new cell receives a complete set of genetic information.
What is DNA?
A bacterium and a human cell are compared under a microscope. The human cell has a nucleus, while the bacterium does not. What major cell type difference does this show?
What is the difference between eukaryotic and prokaryotic cells?
This organelle receives proteins and other materials, modifies them, and sends them where they need to go.
What is the Golgi apparatus?
A person becomes cold and begins shivering. What is the purpose of shivering?
What is helping return body temperature toward a stable range?
Water moves across a selectively permeable membrane toward the side with a higher concentration of dissolved substances. What process is this?
What is osmosis?
This stage of mitosis occurs when chromosomes line up across the middle of the cell.
What is metaphase?
An organism is made of cells that contain a nucleus, mitochondria, and other membrane-bound organelles. What type of organism is it?
What is a eukaryote?
A cell needs to release usable energy from food molecules. Which organelle is primarily responsible for this process?
What is the mitochondrion?
A system detects a change and responds in a way that reduces or reverses that change. What type of feedback is this?
What is negative feedback?
A cell uses energy to move a substance from an area of low concentration to an area of high concentration. What type of transport is occurring?
What is active transport?
This stage of mitosis occurs when sister chromatids are pulled toward opposite sides of the cell.
What is anaphase?
According to cell theory, what happens to a cell when a new cell is produced?
What is that it comes from a pre-existing cell?
A plant cell has an organelle that captures light energy and uses it to make sugars. What organelle is this?
What is the chloroplast?
During childbirth, contractions cause hormones to be released that make contractions stronger, which causes more hormone release. What type of feedback is this?
What is positive feedback?
A cell is placed in a solution with a much lower concentration of dissolved substances than inside the cell. What will most likely happen to the cell, and why?
What is that the cell will gain water and swell because water moves into the cell by osmosis?
A cell divides uncontrollably because the normal controls of the cell cycle have failed. What serious disease can result?
What is cancer?