Lecture Assignment 3 Questions Flashcards
How many layers of phospholipids are present in the cell membrane? ____________
Two
A ___________________________ molecule (or region of a molecule) repels and is repelled by water.
Hydrophobic
_________________________is the term given to extracellular fluid not contained within blood vessels.
Interstitial fluid
A ____________________ is an example of an integral protein that selectively allows particular materials to pass into or out of the cell.
channel protein
Which group of integral proteins serve to mark a cell’s identity so that it can be recognized by other cells? ___________________________
cell recognition proteins
_______________________ is the movement of substances across the membrane without the expenditure of cellular energy.
Passive transport
____________________ is the movement of particles from an area of higher concentration to an area of lower concentration.
Diffusion
When cells and their extracellular environments are ______________________, the concentration of water molecules is the same outside and inside the cells.
isotonic
_______________________ is the process of a cell ingesting material by enveloping it in a portion of its cell membrane, and then pinching off that portion of membrane.
Endocytosis
Name the organelle responsible for the given cell functions below:
a. protein synthesis ________________________
b. sorting, modifying, and shipping of secretions _________________________
c. “energy transformer” __________________________________
d. provides passages throughout much of the cell that function in transporting, synthesizing, and storing materials ___________________________
a. ribosome
b. Golgi apparatus
c. mitochondrion
d. endoplasmic reticulum (ER)
____________ in the trachea move rhythmically and beat constantly, moving waste materials upward through the airways, away from the lungs and toward the mouth.
Cilia
The __________________is a region of the nucleus that is responsible for manufacturing the RNA necessary for construction of ribosomes.
nucleolus
______________________ is the copying of DNA that occurs before cell division can take place.
DNA replication
A __________________ is a functional segment of DNA that provides the genetic information necessary to build a protein.
gene
________________________ is a single-stranded nucleic acid that carries a copy of the genetic code out of the nucleus and into the cytoplasm.
messenger RNA (mRNA)
