unit 3 - cells - test #3 quizlet

Cells of animals do not have:

cell walls

Which way will water flow for the following external solution? hypotonic: v the cell

into

DNA is located within the:

nucleus

What is the function of the energy released by the mitochondrion?

adds a phosphate to ADP, changes ADP to ATP

A semipermeable membrane means that the type of molecules allowed to pass through it is v

limited

The process of "digestion" in a cell is aided by the v

lysosomes

When the required direction of transport is opposed to concentration levels, a cell will expend v energy to v ions across its membrane.

more, transport

A functioning organisim:

must possess interrelated systems, can be unicellular, can be plant or animal

The red blood cell, called an erythrocyte, does not contain a v

nucleus

Subunits within cells that perform specific functions are generally called

organelles

A functional plant or animal, existing through the cooperative organization of interrelated systems, is a(n) v

organism

The source of stored energy in the form of food for all animals and humans ultimately comes from:

plants

The outer layer of a cell which acts as a gatekeeper to a cell is called the v membrane.

plasma

A particular function performed by an arrangement of similar cells is characteristic of v

tissues

Cavities located within plant cells which store water are called

vacuoles

The body contains skeletal, heart, and intestinal muscle cells. The different from the skeletal muscle cells because those cells function without heart and intestinal muscle cells are v conscious thought.

without

A plant cell does not have a plasma membrane like animal cells.

False

A unicellular alga is specialized.

False

Energy is always required to force molecules to move from areas of high concentration to areas of low concentration.

False

Every organelle can function independently.

False

When a cell needs to concentrate a substance in a higher density than outside the plasma membrane, it must use energy in the process called:

active transport

A major segment of a DNA strand is called a(n):

chromosome

In human society no one performs all the tasks necessary to life, but areas of expertise. This occurs within the cell as well and is called instead, people specialize in different

division of labor

Each physical trait of an organism is produced by the instructions of a v

gene

If a cell is placed into a salt and water solution and shrinks from a loss of water, the solution is said to be:

hypertonic