5 Written questions
5 Matching questions
- Describe a chemical bond?
- What is hypotonic?
- Where is genetic coding found?
- What is a buffer and what does it do?
- What are the 2 major types of membranes found in the body?
- a A buffer system is a chemical or pair of chemicals that minimizes changes in pH by reacting with strong acids or strong bases
(ex: buffer bonds to H+ ions when body fluid is becoming too acidic or release H+ ions when fluid becomes too alkaline)
- b A solution with lower salt concentration than in the cells
(cells burst) MORE WATER THAN IN CELL
- c In the DNA of our chromosomes or our genome. It is found in the cell nucleus.
- d Force or attraction between positive and negative charges that keeps atoms closely together
- e 1. Epithelial membranes
2. Connective Tissue membranes
5 Multiple choice questions
- Requires energy of mechanical pressure. Water and dissolved materials are FORCED through a membrane from an area of higher PRESSURE to an area of lower PRESSURE
(Example: formation of tissue fluid and the first step in the formation of urine)
- A solution with a higher salt concentration than in the cells
(cells shrink) LESS WATER THAN IN CELL
- Involves loss of electron of one atom and the gaining of an electron on another atom (ex: NaCl or salt)
- Catalyst: speed up reactions without the use of external energy or heat
- ability of the body to maintain a relatively stable metabolism and to function normally despite changes
5 True/False questions
What are the different kinds of bonding atoms? → 1. Chemical bonds
2. Ionic bonds
3. Covalent bonds
4. Disulfide and Hydrogen bonds
What is the cell nucleus and what is its function? → outer boundary of a cell made up of phospholipids, cholesterol and proteins.
its main job is to protect the cell and acts as a barrier for communication and assists in transport
What is cytoplasm? → a watery solution (cytosol) of minerals, gases, organic molecules and cell organelles are found. it gives the cell its shape
What is a positive feedback mechanism? → bodys response to stimuli reverses the stimulus in effect turning it off for a while and keeps the body within normal range
What is contained in the spinal cavity? → Contains skull and brain (CNS)