Question 1

Which of the following best describes the function of the plasma membrane in a human cell?

Accepted Answer

It acts as a selective barrier, regulating the movement of substances in and out of the cell based on the properties of the phospholipid bilayer.

Question 2

Which type of transport across the plasma membrane requires a protein channel but does NOT require energy input from the cell?

Accepted Answer

Facilitated diffusion

Question 3

A red blood cell is placed in a solution and begins to swell and eventually bursts. What type of solution is the cell in, and what is the underlying process?

Accepted Answer

Hypotonic solution; water moves into the cell by osmosis.

Question 4

During which phase of mitosis do chromosomes align at the center of the cell, and what is the significance of this alignment?

Accepted Answer

Metaphase; ensures that each daughter cell receives an identical set of chromosomes.

Question 5

Which statement correctly distinguishes between transcription and translation in protein synthesis?

Accepted Answer

Transcription converts DNA to mRNA, while translation uses mRNA to assemble amino acids into a protein.

Question 6

Which of the following is an example of an exocrine gland, and what is its primary function?

Accepted Answer

Sweat gland; releases its product onto the skin surface through a duct.

Question 7

Which connective tissue type is characterized by a rigid matrix and is found in the ends of long bones, providing support and reducing friction?

Accepted Answer

Cartilage

Question 8

Which of the following best describes the structure and function of an epithelial membrane?

Accepted Answer

It is composed of epithelial tissue attached to a layer of connective tissue, serving as a protective barrier and lining body cavities.

Question 9

Which tissue type has the greatest regenerative capacity, and why is this clinically significant?

Accepted Answer

Epithelial tissue; it undergoes frequent mitosis, allowing for quick repair and protection against infection.

Question 10

A patient has a burn that destroys both the epidermis and the entire dermis. Which skin functions are most compromised, and what structures are lost?

Accepted Answer

Protection, temperature regulation, and sensation are compromised; sweat glands, hair follicles, and blood vessels are destroyed.

Question 11

Which of the following is NOT a function of the integumentary system?

Accepted Answer

Regulation of blood glucose levels

Question 12

The epidermis is described as 'keratinized stratified squamous epithelium.' What does this mean?

Accepted Answer

It is composed of multiple layers of flat cells, with the outermost layers containing keratin for waterproofing and protection.

Question 13

Which layer of the epidermis is responsible for cell division and regeneration?

Accepted Answer

Stratum basale

Question 14

Which connective tissue structures are found within the dermis and contribute to its function?

Accepted Answer

Blood vessels, sweat glands, hair follicles, and nerve endings

Question 15

A patient is experiencing edema due to increased permeability of capillaries in the dermis. Which tissue type is most involved in this process?

Accepted Answer

Areolar connective tissue

Question 16

Which equation best represents the process of osmosis in a cell?

Accepted Answer

$$ \Delta \Psi = \Psi_{inside} - \Psi_{outside} $$

Question 17

Which formula correctly describes the relationship between surface area and diffusion rate across a membrane?

Accepted Answer

$$ 	ext{Rate} = D 	imes A 	imes \frac{\Delta C}{d} $$

Question 18

Which process is described by the equation $$ 	ext{DNA} ightarrow 	ext{mRNA} ightarrow 	ext{Protein} $$ and what does each arrow represent?

Accepted Answer

Transcription and translation; DNA is transcribed to mRNA, which is then translated into protein.

Question 19

A patient with a genetic mutation affecting the keratin protein in the epidermis is likely to experience which clinical symptom?

Accepted Answer

Fragile skin that is easily damaged and prone to infection.

Anatomy & Physiology: Cell Structure, Tissues, and Integumentary System Study Guide

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