, NLN PAX Science Exam Study Guide Practice Questions & Tips
1.
, NLN PAX Science Exam Study Guide Practice Questions & Tips
2. Cell the smallest living unit and the basic unit of function and structure for all living
things.
3. Nucleus contains the genetic information, or DNA, and controls the activities of the cell.
4. Plasma (cell) separates the contents of the cell from the surrounding fluid (interstitial fluid)
membrane
5. Semipermeable refers to the selective nature of the plasma membrane. It contains pores and
membrane channels that allow only particles of the right size or the right chemical nature
to pass through.
6. Interstitial fluide contains substances such as amino acids, sugars, fatty acids, hormones, neuro-
transmitters, and salts.
7. Cytoplasm is the fluid matrix found between the plasma membrane and the nucleus that acts
as scattolding for the organelles.
, NLN PAX Science Exam Study Guide Practice Questions & Tips
8. Organelles (little organs) are specialized units in the cell that per form certain functions.
9. Mitochondria are the locations for cellular respiration, that is, the conversion of food to energy
at the cellular level. The site of energy production and of most of its ATP.
10. ATP (adenosine the chemical the cell uses to store and transfer energy within itself.
triphosphate)
11. Ribosomes are the sites of protein synthesis in the cell
12. Endoplasmic Ribosomes are attached. Serves as a means for transport within the cell and is
reticulum (ER) made up of many channels. Rough endoplasmic reticulum named for the fact
that it has ribosomes on its surface, serves to store and deliver the proteins made