Question 1

Which of the following best describes the structure of the plasma membrane in human cells?

Accepted Answer

A double layer of phospholipids with hydrophilic heads facing outward and hydrophobic tails facing inward, interspersed with cholesterol.

Question 2

Which of the following cell types is specialized for transmitting electrical signals in the human body?

Accepted Answer

Neuron

Question 3

What is the primary function of lysosomes in a cell?

Accepted Answer

Digestion and recycling of cellular materials

Question 4

Which of the following best explains why cardiac muscle cells contain a large number of mitochondria?

Accepted Answer

They require significant energy for continuous contraction, which is supplied by ATP produced in mitochondria.

Question 5

Which type of epithelial specialization increases surface area for absorption in the intestines?

Accepted Answer

Microvilli

Question 6

A patient has a genetic defect that prevents the formation of tight junctions in epithelial tissue. Which of the following is a likely consequence?

Accepted Answer

Uncontrolled passage of substances between cells

Question 7

Which of the following is a function of connective tissue in the human body?

Accepted Answer

Providing structural support and connecting other tissues

Question 8

Which glandular secretion method involves the loss of both product and cytoplasm from the apical portion of the cell?

Accepted Answer

Apocrine

Question 9

Which of the following best describes the role of the Golgi apparatus in the cell?

Accepted Answer

Processes and packages proteins and lipids for transport

Question 10

A mutation causes a cell to lack functional peroxisomes. Which process would be most directly affected?

Accepted Answer

Breakdown of lipids and detoxification of harmful substances

Question 11

Which of the following is true regarding the process of differentiation in human cells?

Accepted Answer

Differentiation results from activation or inactivation of specific genes, not changes in the DNA sequence.

Question 12

Which of the following best describes the function of fibrocartilage in the human body?

Accepted Answer

Resists compression and prevents bone-to-bone contact

Question 13

Which of the following is a correct pairing of a tissue type and its primary function?

Accepted Answer

Neural tissue – transmission of electrical signals

Question 14

Which of the following best explains why the plasma membrane is described as a 'fluid mosaic'?

Accepted Answer

It is a flexible layer with proteins and lipids that can move laterally within the layer.

Question 15

Which of the following is a function of neuroglia in nervous tissue?

Accepted Answer

Support and protect neurons

Question 16

Which of the following best describes the process of autolysis?

Accepted Answer

Lysosomes release digestive enzymes that break down the cell after injury.

Question 17

Which of the following is a characteristic of endocrine glands?

Accepted Answer

They release hormones directly into the interstitial fluid and blood.

Question 18

Which of the following is a correct sequence of events in the lysosomal pathway for digesting a damaged organelle?

Accepted Answer

Endocytosis → Primary lysosome → Secondary lysosome → Digestion

Question 19

Which of the following best describes the role of gap junctions in epithelial tissue?

Accepted Answer

They allow the free diffusion of ions and small molecules between adjacent cells.

Question 20

Which of the following is a real-life example of a holocrine gland in the human body?

Accepted Answer

Sebaceous (oil) gland

The Cellular and Tissue Levels of Organization: Study Notes for Human Anatomy & Physiology I

Study Guide - Practice Questions