Question 1

Which of the following best describes the primary function of tight junctions between epithelial cells?

Accepted Answer

They form a seal that prevents the passage of substances between cells.

Question 2

A patient has a genetic defect that prevents the formation of desmosomes. Which tissue would most likely be affected, and what symptom might result?

Accepted Answer

Epithelial tissue; increased risk of skin blistering

Question 3

Which of the following statements about epithelial tissue is correct?

Accepted Answer

Epithelial tissue forms selective barriers and is avascular.

Question 4

A biopsy reveals a single layer of flat cells lining a patient's blood vessel. Which type of epithelium is this, and what is its primary function?

Accepted Answer

Simple squamous; diffusion and filtration

Question 5

Which of the following best explains why epithelial tissues heal more rapidly than muscle or nervous tissues?

Accepted Answer

Epithelial cells have a high mitotic rate, allowing for rapid regeneration.

Question 6

A gland that releases its secretion by exocytosis without losing any part of the cell is classified as which type of gland?

Accepted Answer

Merocrine

Question 7

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

Accepted Answer

Areolar connective tissue – provides flexibility and support

Question 8

A histological sample shows cells embedded in a calcified matrix with visible lacunae. Which tissue is this, and what is its primary function?

Accepted Answer

Bone; support and protection

Question 9

Which of the following best describes the difference between endocrine and exocrine glands?

Accepted Answer

Endocrine glands secrete hormones directly into the blood, while exocrine glands secrete substances through ducts to a surface.

Question 10

A patient with a mutation affecting gap junctions would most likely experience problems in which physiological process?

Accepted Answer

Transmission of electrical signals between cardiac muscle cells

Question 11

Which of the following equations best represents the relationship between the number of cell layers ($$n) $$and the rate of diffusion ($$D) $$across an epithelium, assuming all other factors are constant?

Accepted Answer

$$D \propto \frac{1}{n}$$

Question 12

Which connective tissue type is most likely to be found in the walls of arteries, and why?

Accepted Answer

Elastic connective tissue; it allows for stretch and recoil

Question 13

A tissue sample from the urinary bladder shows multiple layers of cells with the uppermost layer appearing rounded when relaxed and flattened when stretched. What type of epithelium is this?

Accepted Answer

Transitional epithelium

Question 14

Which of the following best explains why cartilage heals more slowly than other connective tissues?

Accepted Answer

Cartilage is avascular and lacks a direct blood supply.

Question 15

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

Accepted Answer

Supporting and protecting neurons

Question 16

A patient presents with a burn that destroys the epidermis and underlying connective tissue. Which tissue types are primarily affected, and what is a likely consequence?

Accepted Answer

Epithelial and connective tissue; impaired barrier and support functions

Question 17

Which of the following best describes the arrangement of fibers in dense irregular connective tissue, and what is the functional significance?

Accepted Answer

Fibers are randomly arranged, allowing resistance to tension in multiple directions

Question 18

Which of the following best explains why skeletal muscle tissue appears striated under the microscope?

Accepted Answer

It contains regularly arranged actin and myosin filaments.

Question 19

A patient with a disorder affecting the basement membrane would most likely have problems with which of the following?

Accepted Answer

Attachment of epithelial tissue to underlying connective tissue

Question 20

Which of the following best describes the function of the mucous membrane?

Accepted Answer

It lines body cavities that open to the exterior and secretes mucus for protection and lubrication.

Tissue Level of Organization: Structure and Function in Human Anatomy

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