Question 1

Which layer of the epidermis is primarily responsible for mitotic activity and nourishment, and contains melanocytes and Merkel cells?

Accepted Answer

Stratum basale

Question 2

Desmosomes play a crucial role in the epidermis by:

Accepted Answer

Dividing tension and connecting everything between cells

Question 3

During endochondral ossification, which of the following occurs FIRST?

Accepted Answer

A cartilage (hyaline) template forms

Question 4

Which hormone stimulates osteoclasts to break down bone and release minerals into the blood?

Accepted Answer

Parathyroid hormone (PTH)

Question 5

A patient presents with bowed legs and bone pain due to impaired bone mineralization. Which condition is most likely?

Accepted Answer

Osteomalacia

Question 6

Which of the following is TRUE regarding the stratum lucidum?

Accepted Answer

It is only present in thick skin, such as palms and soles

Question 7

Which process is responsible for the formation of flat bones such as the skull and clavicle during embryonic development?

Accepted Answer

Intramembranous ossification

Question 8

Which vitamin is essential for proper bone deposition and mineralization?

Accepted Answer

Vitamin C

Question 9

A bone fracture heals through several stages. What is the correct order of these stages?

Accepted Answer

Hematoma, fibrocartilaginous callus, bony callus, bone remodeling

Question 10

Which structure allows for communication between osteocytes in compact bone?

Accepted Answer

Canaliculi

Question 11

A 65-year-old woman is diagnosed with osteoporosis. Which of the following factors most likely contributed to her condition?

Accepted Answer

Low estrogen levels after menopause

Question 12

Which layer of the dermis is responsible for most of its thickness and consists of dense, irregular connective tissue?

Accepted Answer

Reticular layer

Question 13

Which of the following best describes the function of hydroxyapatites in bone?

Accepted Answer

Resistance to compressions

Question 14

A patient with Paget's disease is most likely to have which of the following bone abnormalities?

Accepted Answer

Abnormal ratio of spongy bone to compact bone

Question 15

Which of the following equations correctly represents the process of bone resorption by osteoclasts?

Accepted Answer

$$Ca_3$$($$PO_4)_2$$ \rightarrow $$3Ca^{2+} + 2PO$$_$$4^{3-}$$

Question 16

Which of the following is a function of the periosteum?

Accepted Answer

Covers the diaphysis and provides attachment for tendons and ligaments

Question 17

Which cell type is responsible for laying down new bone matrix during bone deposition?

Accepted Answer

Osteoblasts

Question 18

Which of the following best explains why the papillary layer of the dermis has many contours that connect with the epidermis?

Accepted Answer

To increase surface area for diffusion

Question 19

Which of the following is TRUE regarding the epiphyseal plate during long bone growth?

Accepted Answer

It is regulated by growth hormone and thyroid hormone

Question 20

Which of the following is a correct statement about the organization of osteons in compact bone?

Accepted Answer

Osteons are organized in the lamellae to allow for counterforce, which strengthens bone

Integumentary and Skeletal System: Structure, Growth, and Pathology

Guida di studio - Domande di pratica