$$E = \frac{RT}{zF} \ln \left( \frac{[\text{ion outside}]}{[\text{ion inside}]} \right)$$

Question 1

Which of the following best describes the function of osteoclasts in bone tissue?

Accepted Answer

They break down bone matrix, facilitating bone resorption.

Question 2

A patient presents with a greenstick fracture. Which statement best describes this type of fracture?

Accepted Answer

The bone is bent and partially broken, commonly seen in children.

Question 3

Which hormone increases blood calcium levels by stimulating bone breakdown?

Accepted Answer

Parathyroid hormone (PTH)

Question 4

Which of the following is a function of the axial skeleton?

Accepted Answer

Provides support, protects vital organs, and serves as a site for muscle attachment

Question 5

A bone is classified as a 'flat bone.' Which of the following is an example?

Accepted Answer

Parietal bone

Question 6

Which structure is the functional unit of compact bone and contains blood vessels and nerves?

Accepted Answer

Osteon (Haversian system)

Question 7

A patient has osteoporosis due to decreased estrogen after menopause. Which cellular activity is most likely increased?

Accepted Answer

Osteoclast activity

Question 8

Which bone marking is described as a large, rough projection that serves as an attachment site for muscles?

Accepted Answer

Trochanter

Question 9

Which suture separates the two parietal bones of the skull?

Accepted Answer

Sagittal suture

Question 10

Which of the following bones forms the posterior wall of the orbit?

Accepted Answer

Sphenoid bone

Question 11

A patient suffers a fracture at the diaphysis of the femur. Which region of the bone is affected?

Accepted Answer

The shaft, primarily composed of compact bone

Question 12

Which passage allows the optic nerve (CN II) to enter the orbit?

Accepted Answer

Optic canal

Question 13

Which of the following is true regarding spongy bone (trabecular/cancellous)?

Accepted Answer

It contains red marrow and is made of trabeculae that distribute stress.

Question 14

Which vitamin is essential for bone health and aids in calcium absorption?

Accepted Answer

Vitamin D

Question 15

Which equation best represents the Nernst equation for calculating the equilibrium potential of an ion?

Accepted Answer

$$E = \frac{RT}{zF} \ln \left( \frac{[	ext{ion outside}]}{[	ext{ion inside}]} ight)$$

Question 16

Which bone is NOT part of the orbital complex?

Accepted Answer

Mandible

Question 17

Which of the following best describes the process of endochondral ossification?

Accepted Answer

Bone replaces a hyaline cartilage model.

Question 18

A patient has a lesion in the cribriform plate. Which cranial nerve function is most likely affected?

Accepted Answer

Smell

Question 19

Which of the following is a correct pairing of bone marking and its description?

Accepted Answer

Foramen: A round or oval hole

Question 20

Which of the following is a function of the vertebral column?

Accepted Answer

Protects the spinal cord and supports trunk weight

Skeletal System: Structure, Function, and Key Anatomy

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