Histology Test

Question 1

An oophorectomized monkey is treated with high doses of estrogen. Which of the following changes is most likely to occur in the endometrium after 1 year of treatment?

Accepted Answer

Hyperplasia

Answer

Atrophy

Answer

Hypertrophy

Answer

Hypoplasia

Answer

Metaplasia

Question 2

Which of the following muscle cell components helps spread the depolarization of the muscle cell membranes throughout the interior of muscle cells?

Accepted Answer

T tubule

Answer

Actin

Answer

Myosin

Answer

Tropomyosin

Answer

Troponin

Answer

Z disk

Question 3

A new drug is developed that prevents the demyelinization occurring in the progress of multiple sclerosis. The drug protects the cells responsible for the synthesis and maintenance of myelin in the central nervous system. These cells are most likely which of the following?

Accepted Answer

Oligodendrocyte

Answer

Astrocyte

Answer

Ependymal cell

Answer

Microglial cell

Answer

Schwann cell

Question 4

A 10-year-old boy undergoes an appendectomy. Granulation tissue develops normally at the incision site. Tissue remodeling begins at this site with degradation of collagen in the extracellular matrix by which of the following proteins?

Accepted Answer

Metalloproteinase

Answer

Cytokines

Answer

Lipoxygenases

Answer

Nitric oxide

Answer

Plasminogen activator

Question 5

In which of the following nuclear structures is DNA actively transcribed to rRNA?

Accepted Answer

Nucleolus

Answer

Envelope

Answer

Lamina

Answer

Matrix

Answer

Pore

Question 6

A 22-year-old man is brought to the emergency department in respiratory distress 15 minutes after he was stung on the arm by a wasp. His pulse is 100/min, respirations are 30/min, and blood pressure is 100/60 mm Hg. Physical examination shows grunting respirations and subcostal retractions. Expiratory wheezes are heard over both lung fields. There is generalized urticaria. Secretion of the molecule causing this patient’s symptoms is most likely mediated by which of the following?

Accepted Answer

Activation of mast cell

Answer

Activation of complement

Answer

Activation of T lymphocytes

Answer

Production of IgA

Answer

Production of IgG

Answer

Production of IgM

Question 7

A 66-year-old man with Zollinger-Ellison syndrome undergoes a gastrectomy. He is informed that he will require treatment with intramuscular vitamin B12 (cyanocobalamin) for the rest of his life. This therapy is necessary because this patient lacks which of the following types of cells?

Accepted Answer

Parietal

Answer

Chief

Answer

G (gastrin)

Answer

Goblet

Answer

Mucous neck

Question 8

Beginning with protein synthesis in membrane-bound ribosomes, hepatocytes secrete proteins into the circulation via which of the following mechanisms?

Accepted Answer

Transport in vesicles and exocytosis

Answer

Active transport through the cell membrane

Answer

Diffusion through the cell membrane

Answer

Transport by microtubules and exocytosis

Answer

Transport through pores in the cell membrane

Question 9

Which of the following is required to transport fatty acids across the inner mitochondrial membrane?

Accepted Answer

Carnitine

Answer

Acyl carrier protein

Answer

Albumin

Answer

Chylomicrons

Answer

Creatinine

Answer

Lecithin-cholesterol acyltransferase

Question 10

An experiment is conducted in which the mitochondrial content of various tissues is studied. It is found that the mitochondrial content is directly proportional to the amount of energy one cell is required to generate and expend. The mitochondrial content is most likely greatest in which of the following types of cells?

Accepted Answer

Cardiac muscle cells

Answer

Chondrocytes

Answer

Endothelial cells

Answer

Epidermal cells

Answer

Hepatocytes

Answer

Osteocytes

Answer

White adipocytes

An oophorectomized monkey is treated with high doses of estrogen.Which of the following changes is most likely to occur in the endometrium after 1 year of treatment?

An oophorectomized monkey is treated with high doses of estrogen.
Which of the following changes is most likely to occur in the endometrium after 1 year of treatment?