Understanding Anatomy & Physiology: Chapter 3
Cells Practice Questions with Correct Solutions
plasma membrane - Answer regulates what goes in and out of the cell
cytoplasm - Answer Gel-like substance that fills the cell
nucleus - Answer Control center of the cell; contains all of the cells genetic information
selectively permeable - Answer some substances can pass across them and others cannot
nuclear envelope - Answer layer of two membranes that surrounds the nucleus of a cell
nuclear pores - Answer pores regulate the passage of molecules into the nucleus (to construct RNA and
DNA) as well as out the nucleus (RNA to leave to perform the work in the cytoplasm)
chromatin - Answer thread like structures composed of DNA and protein
chromosomes - Answer short, rod like structures: after a cell begins to divide
nucleolus - Answer center of the nucleus
ribosomes - Answer cell protein producing structures
organelles - Answer little organs that perform specific tasks in the cellular metabolism
endoplasmic reticulum - Answer network of membranes canals and curving sacs:
rough er has ribosomes that dot the surface of some of the re and give the er that rough look.
, smooth er - Answer That portion of the endoplasmic reticulum that is free of ribosomes: contains
enzymes that synthesize certain lipids and carbs
golgi apparatus - Answer receives proteins from the er and prepares and packages them for export to
other parts of the body
centrioles - Answer they play a role in cell division
lysosomes - Answer help break down protein the cell doesn't need
mitochondria - Answer Powerhouse of the cell
cristae - Answer folds in the inner membrane of mitochondria
cytoskeleton - Answer framework of the cell; determines the shape of the cell
microvilli - Answer projections that increase the cell's surface area
cilia - Answer Hairlike processes along the surface of the cell
flagella - Answer tail of a sperm cell
passive transport - Answer the movement of substances across a cell membrane without the use of
energy by the cell
diffusion - Answer Movement of molecules from an area of higher concentration to an area of lower
concentration.
Equilibrium - Answer A state of balance
Cells Practice Questions with Correct Solutions
plasma membrane - Answer regulates what goes in and out of the cell
cytoplasm - Answer Gel-like substance that fills the cell
nucleus - Answer Control center of the cell; contains all of the cells genetic information
selectively permeable - Answer some substances can pass across them and others cannot
nuclear envelope - Answer layer of two membranes that surrounds the nucleus of a cell
nuclear pores - Answer pores regulate the passage of molecules into the nucleus (to construct RNA and
DNA) as well as out the nucleus (RNA to leave to perform the work in the cytoplasm)
chromatin - Answer thread like structures composed of DNA and protein
chromosomes - Answer short, rod like structures: after a cell begins to divide
nucleolus - Answer center of the nucleus
ribosomes - Answer cell protein producing structures
organelles - Answer little organs that perform specific tasks in the cellular metabolism
endoplasmic reticulum - Answer network of membranes canals and curving sacs:
rough er has ribosomes that dot the surface of some of the re and give the er that rough look.
, smooth er - Answer That portion of the endoplasmic reticulum that is free of ribosomes: contains
enzymes that synthesize certain lipids and carbs
golgi apparatus - Answer receives proteins from the er and prepares and packages them for export to
other parts of the body
centrioles - Answer they play a role in cell division
lysosomes - Answer help break down protein the cell doesn't need
mitochondria - Answer Powerhouse of the cell
cristae - Answer folds in the inner membrane of mitochondria
cytoskeleton - Answer framework of the cell; determines the shape of the cell
microvilli - Answer projections that increase the cell's surface area
cilia - Answer Hairlike processes along the surface of the cell
flagella - Answer tail of a sperm cell
passive transport - Answer the movement of substances across a cell membrane without the use of
energy by the cell
diffusion - Answer Movement of molecules from an area of higher concentration to an area of lower
concentration.
Equilibrium - Answer A state of balance
