Anatomy & Physiology Chapter 3 - Cells and Tissue

Multiple Choice

Who discovered that animals were made of cells in 1838?

• Matthias Schleiden

• Theodor Schwann

• Rudolf Virchow

• Louis Pasteur

Open Ended

Why was the discovery that all plants and animals are composed of cells significant for the field of biology?

Multiple Choice

Which of the following is NOT a part of the cell theory?

• All living things are composed of one or more cells.

• Cells are the basic unit of life.

• All cells come from preexisting cells.

• Cells are only found in animals.

Open Ended

As a cell increases in size, what happens to its surface area to volume ratio, and why is this important for cell division?

Multiple Choice

Which of the following can be observed with a light microscope but not with the naked eye?

• Atom

• Protein

• Animal cell

• Ostrich egg

Fill in the Blank

Cells are the structural units of all ___ things.

Open Ended

Explain why water is important for cells, considering that cells are about 60-80% water.

Multiple Choice

Which four elements make up most of the composition of cells?

• Carbon, Hydrogen, Oxygen, Nitrogen

• Carbon, Oxygen, Phosphorus, Sulfur

• Hydrogen, Oxygen, Calcium, Iron

• Nitrogen, Oxygen, Potassium, Sodium

Multiple Choice

What are the three main regions of a generalized cell?

• Nucleus, Cytoplasm, Plasma membrane

• Nucleus, Mitochondria, Cytoplasm

• Plasma membrane, Ribosome, Cytoplasm

• Nucleus, Chromatin, Plasma membrane

Fill in the Blank

Fill in the blank: The control center of the cell is the ___.

Multiple Select

Which of the following are functions of the nuclear envelope?

• Consists of a double membrane

• Contains nuclear pores for exchange of material

• Encloses the nucleoplasm

• Synthesizes proteins

Open Ended

Describe the role of chromatin in the cell nucleus and what happens to it during cell division.

Multiple Choice

Which of the following is NOT a function of the plasma membrane?

• Acts as a transparent barrier for cell contents

• Contains cell contents

• Separates cell contents from the surrounding environment

• Produces energy for the cell

Multiple Choice

According to the fluid mosaic model, what are the main components that make up the plasma membrane?

• Phospholipids, cholesterol, proteins, and sugar groups

• DNA, RNA, and proteins

• Carbohydrates, nucleic acids, and water

• Lipids, water, and minerals

Multiple Select

Which structures are labeled in the diagram of the plasma membrane? Select ALL that apply.

• Glycoprotein

• Cholesterol

• Mitochondria

• Channel

Fill in the Blank

The hydrophilic heads of phospholipids are oriented toward the ___ of the plasma membrane.

Open Ended

Explain how the arrangement of phospholipids in the plasma membrane contributes to its function as a barrier.

Open Ended

Describe two specialized functions of membrane proteins as shown in the slides.

Multiple Choice

Which of the following best describes the function of glycoproteins in the plasma membrane?

• They act as enzymes for metabolic reactions.

• They serve as cellular glue in the glycocalyx.

• They store genetic information.

• They transport oxygen across the membrane.

Open Ended

Explain how the structure of tight junctions contributes to their function in the plasma membrane.

Multiple Select

Which of the following statements about desmosomes are correct?

• They are anchoring junctions that prevent cells from being pulled apart.

• They are created by buttonlike thickenings of adjacent plasma membranes.

• They allow molecules to travel directly from one cell to another.

• They bind cells together into leakproof sheets.

Fill in the Blank

Gap junctions are also known as ___ junctions.

Multiple Choice

Which type of cell junction allows direct communication between adjacent cells by permitting molecules to pass through channels?

• Tight junctions

• Desmosomes

• Gap junctions

• Microvilli

Multiple Choice

Which scientist discovered that all plants are composed of cells?

• Theodor Schwann

• Rudolf Virchow

• Matthias Schleiden

• Robert Hooke

Open Ended

How did the discoveries of Matthias Schleiden, Theodor Schwann, and Rudolf Virchow contribute to our understanding of cells?