Characteristics of Life
What is the basic unit of life?
Cell
What property of water allows it to stick to other water molecules?
Cohesion
What is the movement of particles from high concentration to low concentration called?
Diffusion
Which macromolecule is the body's main source of energy?
Carbohydrates
What hormone helps lower blood glucose levels?
Insulin
What characteristic of life allows an organism to produce offspring?
Reproduction
What property allows water to stick to surfaces such as the inside of a plant stem?
Adhesion
Movement of water
Osmosis
Which macromolecule has many different functions and contains enzymes?
Proteins
What hormone helps raise blood glucose levels?
Glucagon
What is metabolism?
All chemical reactions in a cell or organism.
What does active transport require?
Energy/ATP
Which macromolecule includes fats and oils and is important for long-term energy storage?
Lipids
What cells release insulin? What cells release glucagon?
Beta cells release insulin.
Alpha cells release glucagon.
A person sweats when they become too hot. What characteristic of life does this demonstrate?
Maintaining homeostasis
Is water polar or nonpolar? Why water does not mix with oil?
Water is polar. They do not mix since oil is nonpolar.
A cell is placed in a solution with a higher solute concentration outside the cell. Which direction will water move?
Out of the cell
Which macromolecule stores genetic information?
Nucleic Acids
What organ produces insulin and glucagon?
Pancreas
A bear grows, hibernate during the winter, and produces cubs.
Name THREE characteristics of life demonstrated in this example.
Water
A cell is placed in a hypotonic solution. Predict what will happen to the cell and explain why.
Water will move into the cell, causing the cell to swell.
A food sample tests positive with Lugol's solution. What macromolecule is likely present
Carbs/starch
Predict the mechanism for the following scenario: a person forgot to eat lunch.
Blood sugar go low
Glucagon is release and signals the liver to release glycogen.
Blood sugar rises again because