Q: Which equation best represents the homeostatic feedback loop for blood calcium regulation involving PTH?

$$\text{Low blood calcium} \rightarrow \text{PTH release} \rightarrow \text{Osteoclast activation} \rightarrow \text{Bone resorption} \rightarrow \text{Increased blood calcium}$$

Q: Which equation represents the mineral composition of bone, contributing to its hardness and resistance to compression?

$$\text{Bone} = \text{Collagen fibers} + \text{Calcium phosphate crystals}$$

Question 1

Which type of skeletal cartilage is most abundant in the human body and provides support, flexibility, and resilience?

Accepted Answer

Hyaline cartilage

Question 2

A patient presents with a fracture in the shaft of their femur. Which part of the long bone is affected?

Accepted Answer

Diaphysis

Question 3

Which bone cell type is responsible for bone resorption and has a ruffled border to increase surface area for enzyme release?

Accepted Answer

Osteoclasts

Question 4

Which hormone is released in response to low blood calcium levels and stimulates osteoclasts to resorb bone?

Accepted Answer

Parathyroid hormone (PTH)

Question 5

Which of the following is NOT a primary function of bone?

Accepted Answer

Vitamin D synthesis

Question 6

Which type of bone is classified as being longer than it is wide and is found in the limbs?

Accepted Answer

Long bone

Question 7

During bone growth, which zone of the epiphyseal plate is responsible for mitosis and new cartilage formation?

Accepted Answer

Proliferation (growth) zone

Question 8

Which process describes the formation of bone tissue from cartilage during embryonic development?

Accepted Answer

Osteogenesis

Question 9

A patient with osteoporosis is at increased risk for which type of fracture?

Accepted Answer

Fractures from loss of bone mass

Question 10

Which bone cell type acts as a stress or strain sensor and communicates with osteoblasts and osteoclasts to coordinate bone remodeling?

Accepted Answer

Osteocytes

Question 11

Which equation best represents the homeostatic feedback loop for blood calcium regulation involving PTH?

Accepted Answer

$$	ext{Low blood calcium} ightarrow 	ext{PTH release} ightarrow 	ext{Osteoclast activation} ightarrow 	ext{Bone resorption} ightarrow 	ext{Increased blood calcium}$$

Question 12

Which of the following is a correct description of appositional bone growth?

Accepted Answer

Bone grows in thickness by addition of bone matrix to the outer surface

Question 13

Which type of cartilage is found in the external ear and epiglottis, and contains elastic fibers?

Accepted Answer

Elastic cartilage

Question 14

Which bone marking serves as a conduit for blood vessels and nerves?

Accepted Answer

Foramen

Question 15

Which of the following best explains why bones are able to remodel in response to mechanical stress?

Accepted Answer

Bone tissue is dynamic and responds to mechanical forces by altering its structure

Question 16

Which of the following is a correct sequence of events in bone fracture repair?

Accepted Answer

Hematoma formation → Fibrocartilaginous callus formation → Bony callus formation → Bone remodeling

Question 17

Which of the following is a function of osteocalcin produced by bone?

Accepted Answer

Regulates insulin secretion and glucose metabolism

Question 18

Which of the following best describes the difference between compact and spongy bone?

Accepted Answer

Spongy bone consists of trabeculae and is found at the ends of long bones

Question 19

Which equation represents the mineral composition of bone, contributing to its hardness and resistance to compression?

Accepted Answer

$$	ext{Bone} = 	ext{Collagen fibers} + 	ext{Calcium phosphate crystals}$$

The Skeletal System: Structure, Function, and Cartilage Types (Objective 5: Part 1, Chapter 6)

Guida di studio - Domande di pratica

Study guide - Flashcard