Chapter 6 - A Tour of the Cell

Robert Hooke

In 1665, ________ used a microscope to examine dead cells from the bark of an oak tree and discovered cell walls for the first time.

Multicellular creatures

________ are larger, more sophisticated organisms, such as plants and mammals.

Microscopes

________ were created in 1590 and improved during the 1600s.

plasma membrane

The ________ acts as a selective barrier at the cell's border, allowing sufficient oxygen and nucleic acid to flow through.

Light microscopes

________ can successfully magnify a specimen to roughly 1, 000 times its original size; at higher magnifications, extra features can not be seen well.

simplest collection of materials

The cell is the ________ that may be called a living thing in the biological organization hierarchy.

conventional light microscopy

Because 40 nm is less than the 200- nm resolution limit for ________, the greenish- yellow dots appear fuzzy.

3 D reconstruction

A(n) ________ may be constructed by collecting crisp pictures at several distinct planes.

Cells

________ form connections between nerve ________, allowing memories to be solidified and learning to take place.

Bacteria

________ are typically 1- 5 m in diameter, roughly ten times the size of mycoplasmas.

Eukaryotic cells

________ have a diameter of 10- 100 m.

number of specialized organelles

A(n) ________ exist in the cytoplasm of a eukaryotic cell, suspended in cytosol.

Individual fluorescent molecules

________ are illuminated and their positions are recorded using sophisticated technology.

Cells

________ are the building blocks of all creatures.

Cells

________ are as important to biology's living systems as the atom is to chemistry.

Cells

________ have been changed in a variety of ways during the long evolutionary history of life on Earth.