7.4 Lecture Flashcards
(48 cards)
What is a Cytoplasm?
the gelatinous liquid that fills the inside of a cell
what is a Cytoskeleton?
a supporting network of long, thin protein fibers that form a framework for the cell and provide an anchor for the organelles.
What are Microtubules?
long, hollow protein cylinders that form a rigid skeleton for the cell and assist in moving substances within the cell.
What are Microfilaments?
thin protein threads that help give the cell shape and enable the part or the entire cell move.
What is a nuclear envelope?
double membrane
What are Ribosomes?
organelles that manufacture proteins.
what is endoplasmic reticulum?
a membrane system of folded sacs and interconnected channels that serves as the site for protein and lipid synthesis.
what is the Golgi Apparatus?
a flattened stack of membranes that modifies, sorts, and packages proteins.
What is a Vacuole?
a membrane bound sac used for temporary storage.
what are Lysosomes?
vesicles that contain substances that digest excess or worn-out organelles and food particles.
what are Centrioles?
organelles made of groups of microtubules that function during cell division.
What is a Mitochondrion?
convert fuel particles into usable energy.
what do Chloroplasts do?
capture light and convert it into chemical energy in process called photosynthesis.
What are Thylakoids?
multiple small disks
What is a Cell wall?
a thick, rigid, mesh of fibers that surround the outside of the plasma membrane.
What is a Cilia?
short, numerous projections that look like hair.
what are Flagella?
longer and less numerous than cilia.
What statements about the sodium-potassium ATPase pump that are true.
The pump maintains the level of sodium ions (Na+) and potassium ions (K+) inside and outside the cell.
The pump uses the energy to transport three sodium ions out of the cell while moving two potassium ions into the cell.
what the functions of proteins in the plasma membrane.
Proteins at the inner surface of the plasma membrane anchor the plasma membrane to the cell’s internal support structure, giving the cell its shape.
Proteins span the entire membrane and create tunnels through which certain substances enter and leave the cell.
When found on the outer surface of the plasma membrane, proteins called receptors transmit signals to the inside of the cell.
What is the magnification of the ocular lens in the microscope you used in lab?
10x
What is Homeostasis?
The Process of maintaining balance in an organisms internal environment
What is a cell?
The basic structural and functional unit of all living organisms.
what is cell theory?
One of the fundamental ideas of modern biology
what is the difference between prokaryotic and eukaryotic
Prokaryotic: no nucleus or membrane bound cells
Eukaryotic: cells with nucleus
