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39 Cards in this Set

  • Front
  • Back
All living things are composed of many cells.
A cell is the smallest unit that can carry on all the processes of life.
As a cell gets larger, its volume increases at a faster rate than its surface area
The long extension on nerve cells enable them to form a rigid scaffolding that gives brain tissue its structure
Membranes are selectively permeable if they allow only certain substances to diffuse across them.
Lysosomes carry on cellular respiration
Micotubules and microfilaments form the cytoskeleton of cells
The only difference between a plant cell and an animal cell is that plant cells have chloroplasts
Facilitated diffusion meves molecules and ions in one direction only, while active transport moves them in two directions
During the Process of exocytosis, the cell membrane extends to engulf substances that are too big to pass through the cell membrane.
Hooke's discovery of cells was made observing
dead plant cells
Surface area is an important factor in limiting cell growth because
the cell maybecome too large to take in enough food and to remove enough waste.
The size of which a cell can grow is limited by its
surface area
A cell that can change its shape would be well suited for
moving to different tissues through narrow openings
Which of the following is a characteristic of prokaryotes?
a.) they have a nucleus
b.) they were found on Earth before eukaryotes
c.) the organelles in their cytoplam are surrounded by membranes.
d.) none of the above
They were found on earth before eukaryotes.
Which of the following is an example of a prokaryotic cell? A.)amoeba B.) virus C.) bacterium D.) liver cell
Studying a picture of a cell taken with an electron microscope, you find that the cell has no nucleus and no mitochondria, but it does have a cell membrane and a cell wall. You conclude that the cell is probably from a
Cell membranes
A. are only found on a small number of cells
B. contain genes
C. are made of DNA
D. are thin covering that surround cells.
are thin coverings that surround cells
A protein that fits into the cell membrane
a. has two polar end sections that bond with water
b. floats in the cell membrane
c. has a nonpolar middle section.
d. all of the above
all of the above
the cell membrane
a. encloses the contents of a cell.
b. allows material to enter and leave the cell.
c. is selectively permeable
d. all of the above
all of the above
a particularly active cell might contain large number of
in which of the following organelles is a cell's ATP produced?
a. mitochondrion
b. endoplasmic reticulum
c. Golgi apparatus
d. lysosome
Numerous threadlike organelles that protrude from the surface of a cell and are packages in tight rows are called
Proteins are made in cells on the
The double membrane surrounding the nucleus is called the
nuclear envelope
All cells have
a membrane, internal fluid that gives shape to the cell and supports the other things within it.
The cell uses the mitochondria to
produce energy
Animal cells do not have a
cell wall
the organelles in plant cells that contain a green pigment are the
Which of the following is not a speacialized activity found in cells of Volox colonies
transmission of messages
As a result of diffusion, the concentration of many types of substances
eventually becomes balanced on both sides of a membrane
Diffusion takes place
from an area of high concentration to an area of low concentration
Channels utilizing facilitated diffusion
work in two directions.
Which of the following does not expend energy
The process by which water passes into or out of a cell is called
Molecules that are too large to be moved across the cell membrane can be removed from the cell by
Molecules that are to large to be moved through the membrane can be trasported into th cell by
The statement that "cells are produced only from existing cells" is part of the
Cell Theory
The ration of surface are to volume puts limitation on a cell's