Q: Which equation best represents the hydrophobic barrier created by membrane lipids?

$$\text{Phospholipid bilayer} = \text{Hydrophilic heads} + \text{Hydrophobic tails}$$

Q: Which of the following equations correctly represents the relationship between rough ER and smooth ER?

$$\text{Rough ER} = \text{ER} + \text{Ribosomes}$$

Q: Which equation best represents the composition of the extracellular matrix?

$$\text{Extracellular matrix} = \text{Proteoglycans} + \text{Insoluble protein fibers}$$

Q: Which equation best represents the relationship between stem cell potency levels?

$$\text{Totipotent} \u003e \text{Pluripotent} \u003e \text{Multipotent}$$

Question 1

Which of the following best describes the relationship between the lumen of the digestive tract and the external environment?

Accepted Answer

The lumen is considered an extension of the external environment because substances in it have not yet crossed the body's epithelial barrier.

Question 2

Which of the following is NOT one of the three major body cavities?

Accepted Answer

Cranial cavity

Question 3

A cell membrane is primarily composed of which two types of macromolecules?

Accepted Answer

Lipids and proteins

Question 4

Which equation best represents the hydrophobic barrier created by membrane lipids?

Accepted Answer

$$	ext{Phospholipid bilayer} = 	ext{Hydrophilic heads} + 	ext{Hydrophobic tails}$$

Question 5

Which of the following best distinguishes integral membrane proteins from peripheral membrane proteins?

Accepted Answer

Integral proteins are embedded within the lipid bilayer, while peripheral proteins are attached to the membrane surface.

Question 6

Which of the following is a function of the cytoskeleton?

Accepted Answer

Providing structural support and facilitating cell movement

Question 7

A scientist observes a cell with many cristae and a double membrane. Which organelle is being described?

Accepted Answer

Mitochondrion

Question 8

Which of the following equations correctly represents the relationship between rough ER and smooth ER?

Accepted Answer

$$	ext{Rough ER} = 	ext{ER} + 	ext{Ribosomes}$$

Question 9

Which of the following best describes the function of lysosomes?

Accepted Answer

Intracellular digestion and recycling of cellular components

Question 10

Which of the following is NOT a function of the Golgi apparatus?

Accepted Answer

Synthesizing ATP

Question 11

Which equation best represents the composition of the extracellular matrix?

Accepted Answer

$$	ext{Extracellular matrix} = 	ext{Proteoglycans} + 	ext{Insoluble protein fibers}$$

Question 12

Which type of cell junction allows direct cytoplasmic communication between adjacent cells?

Accepted Answer

Gap junction

Question 13

Which of the following is a distinguishing characteristic of connective tissue?

Accepted Answer

Cells are loosely arranged in an abundant extracellular matrix.

Question 14

Which of the following best describes apoptosis?

Accepted Answer

A tidy, programmed form of cell death that does not elicit an inflammatory response.

Question 15

Which equation best represents the relationship between stem cell potency levels?

Accepted Answer

$$	ext{Totipotent} \u003e 	ext{Pluripotent} \u003e 	ext{Multipotent}$$

Question 16

Which of the following is a primary function of exchange epithelia?

Accepted Answer

Rapid movement of molecules between compartments

Question 17

Which of the following best describes the basal lamina?

Accepted Answer

A thin extracellular layer that supports epithelial cells and separates them from underlying tissue

Question 18

Which of the following is NOT a type of muscle tissue?

Accepted Answer

Connective muscle

Question 19

Which of the following is a function of the nucleus in a typical cell?

Accepted Answer

Storage and transmission of genetic information

Question 20

Which of the following best describes the function of tight junctions?

Accepted Answer

Prevent movement of substances between adjacent cells, creating a barrier

Anatomy & Physiology: Study Guide on Cells, Tissues, and Organs

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