Misc 1
Which type of cell contains membrane-bound organelles?
Eukaryotic cells
What is a negative feedback loop?
A response to a stimulus that reverses a change to keep conditions stable.
What is passive transport?
Movement of molecules without using energy.
Which organelle is the command center of the cell and stores DNA?
Nucleus
Which type of cell contains chloroplasts?
Plant cells
According to cell theory, where do all cells come from?
All cells come from pre-existing cells.
When environments get cold, we will shiver in order to? :
Keep body temperature the same as the external temperature,
Decrease body temperature,
Increase body temperature,
Regulate blood pressure
Increase body temperature.
No net movement of water molecules is observed. The solution is...
The solution is isotonic.
What is an organelle?
A specialized, membrane-bound structure found within the cell that performs specific tasks.
What is another word to describe homeostasis?
Stable, equal, equilibrium
Which one of these are a Prokaryote? Flower, Bacteria, algae or animal
Bacteria
Is regulating your body temperature a positive or negative feedback loop?
Negative
Define active transport
Answer: an energy-requiring process that moves molecules and ions across a cell membrane from an area of lower concentration to an area of higher concentration, against their concentration gradient
What is the purpose of the mitochondria?
To produce ATP
What is the main difference between eukaryotic and prokaryotic cells?
Eukaryotic cells have a nucleus and membrane-bound organelles, while prokaryotic cells do not.
What are two structures found in Plant cells but not in Animal cells?
Cell wall, chloroplasts
Is ripening fruit a positive or negative feedback loop?
Positive
What's it called when substances leave the cell?
Exocytosis
Made of phospholipids and controls what comes out of the cell.
Cell membrane.
Which organelle is responsible for storing water, nutrients, and waste in a cell?
Vacuole
Angelisse, et. al- The net movement of particles along the concentration gradient is called____?
Diffusion
Explain what happens when an organism can no longer maintain homeostasis. What can affect an organism's ability to maintain homeostasis?
Conditions that are too extreme can cause a permanent disruption of homeostasis, causing the organism to perish due to its inability to keep up with the extreme changes.
- Examples of factors: pH, temperature, light levels, pressure, disease, stress, electrolyte imbalances, water intake, radiation, toxins, etc.
What is the main difference between active transport and passive transport in cells?
Active transport uses energy, passive does not.
What is cytosol?
The gel-like substance that surrounds the organelles.
What are the three main components of the modern cell theory?
Cells are the fundamental unit of life.
All living things are composed of cells.
Cells arise only from pre-existing cells.
Cells carry genetic material in the form of DNA, which is passed from parent to daughter cell.