Chapter 4 Flashcards
The fluid mosaic model does includes:
lipids
proteins
membrane flexibility
Selectively permeable membranes allow
only certain molecules to pass through
Who is known for grinding his own lenses to view tiny organisms?
Leeuwenhoek
The diffusion of water through a membrane is
osmosis
Active transport requires a cell to use
its own energy
a _______________ is not found in all cells
cell wall
The compound light microscope is called compound because
it uses two sets of lenses
A student views a specimen through a microscope using a 10x eyepiece and a 44x objective. The image of the specimen is enlarged by how much?
440 times
Which plant organelle regularly appears green?
chloroplasts
Which of the following does not belong with the other three? nucleus chromosomes DNA cilia
cilia
The parts of a cell that carry on many of the functions necessary to keep the cell alive
cytoplasmic organelles
the powerhouses of the cell
mitochondria
a series of folded membranes found in the cytoplasm of cells that allows substances to move from one part of the cell to another
endoplasmic reticulum
an organelle responsible for packaging substances that are then released from the cell
Golgi apparatus
a structure in cells that stores various types of materials
vacuole
an organelle that contains substances and structures needed to carry on photosynthesis
chloroplast
long whiplike structures used in cellular movement
flagella
an organelle that contains enzymes to digest substances that are no longer needed
lysosome
the cellular structure that contains the chromosomes
nucleus
structure made of DNA and other molecules
chromosomes
True or False
Cell membranes have one basic design, but there are many variations of that design in different types of cells.
True
True or False
Mitochondria have two layers of membranes, and the inner membrane is folded into ridges.
True
True or False
Flagella are generally shorter and found in greater numbers on a cell than are cilia
False
True or False
The inner membranes of chloroplasts contain chlorophyll
True
True or False
A medical doctor who examines human tissues, blood, and other body fluids to diagnose diseases and disorders is a podiatrist.
False
Be able to label the following structures of a cell: vacuole nucleus mitochondrion endoplasmic reticulum cilia
study the animal cell on page 56
Two types of passive transport are:
diffusion and osmosis
The movement of molecules from a region of high concentration to a region of low concentration is called?
diffusion
The thick fluid inside a cell membrane is the
cytoplasm
____________ are tiny organelles that direct the assembling of proteins.
ribosomes
Chlorophyll is to chloroplast as DNA is to __________
nucleus
