Biology Exam Review Part 3
What is a prokaryote?
A cell without a nucleus
What is a eukaryote?
a cell with a nucleus
What is the purpose of the flagella?
whip like structures made up of microtubules; they are used for movement
Funtion of blood?
Transports oxygen and nutrients to all parts of the body
What is th septum?
Divides the heart into the right and left sides and prevents the mixing of oxygen poor and oxygen rich blood.
What is the atrium
The upper chamber of the heart.
What is the ventricle?
Part of the heart pumps blood out of the heart to the rest of the body and to the lungs
A small mass of tissue in the right atrium that impulses stimulating the heartbeat.
A small mass of tissue through which impulses from the SA node are passed to the ventricles.
What is the aorta?
Largest blood vessel, contains the highest pressure.
What are arteries?
Carry blood away from the heart; most contain oxygen-rich blood.
What are capillaries?
Small vessels that bring oxygen and nutrients to the cells and absorb/ remove carbon dioxide and wastes from cells
What are veins?
Carry's blood toward the heart ith de-oxygenated blood.
What are varicose veins?
High blood pressure in legs causes veins to stretch and valves in veins no longer close. This causes blood to pool in the veins.
What is Hypertension?
High blood pressure.
What is Hypotension?
Low blood pressure.
What is hemoglobin?
A sickled cell that causes blood cells to carry less oxygena and iron around the body.
Whatv are red blood cells?
Carry oxygen and carbon dioxide to and from cells.
What are white blood cells?
They attack forgien cells and create anit-bodies.
What are platelets?
These are specialized cells in the blood that are responsible for clotting.
What is atherosclerosis?
Plaque can block your arteries, causing no oxygen and nutrients to be able to get to certain parts of the heart and then a part of the heart will die.
What is facilitated diffusion
When molecules move from an area of high concentration to an area of low concentration
What is osmosis?
When water moves from an area of high concentration to low concentration across the cell membrane.
What is hypotonic solution.
When the solute concentration inside the cell is higher than the solute concentration outside of the cell.
What is hypertonic solution
When solute concentration is greater outside of the cell.
what is hypertonic solution
When water moves out of the cell and the cell shrinks.
What is hypotonic solution
When water moves inside of the cell and the cell swells.
What are capillaries?
Blood vessels that deliver oxygen and nutrients to the cells and remove carbon dioxide and wastes from the cells of the body.