L7 Cellular Activity of Bone Tissue

Description

Objectives: • Describe the general principles of bone growth. • Describe the process of bone remodelling and explain how this relates to osteoporosis. • Describe the healing of bone fractures.
Mer Scott
Quiz by Mer Scott, updated more than 1 year ago
Mer Scott
Created by Mer Scott over 7 years ago
13
1

Resource summary

Question 1

Question
It takes about 6 weeks for the fibrocartilage in a fetus to begin developing into bones(ossification.)
Answer
  • True
  • False

Question 2

Question
The [blank_start]diaphysis[blank_end] of long bones is the [blank_start]primary[blank_end] centre of ossification. The [blank_start]secondary centres[blank_end] occur in the [blank_start]epiphysis[blank_end]. These are separated by the epiphyseal plate, which is initially cartilaginous but becomes bone later in life.
Answer
  • diaphysis
  • primary
  • secondary centres
  • epiphysis

Question 3

Question
The process of bone growing in width is called moulding.
Answer
  • True
  • False

Question 4

Question
During moulding: (Choose ALL CORRECT statements.)
Answer
  • Osteoblasts in the periosteum increase bone width.
  • Osteoclasts form the medullary cavity.
  • Osteoblasts in the medullary cavity form the trabeculae.
  • Osteoclasts increase the width of the periosteum.

Question 5

Question
In children, the medullary cavity is full of yellow marrow to facilitate the continuous growth, while in adults the medullary cavity is filled with red marrow.
Answer
  • True
  • False

Question 6

Question
Red marrow is red as it is highly vascularised.
Answer
  • True
  • False

Question 7

Question
What is epiphyseal fusion?
Answer
  • The calcification of the region between an epiphysis and edge of the medullary cavity.
  • The ossification of the epiphyseal joint.
  • The ossification of the epiphyseal plate.
  • The merging of two regions of bone between the epiphysis and diaphysis.

Question 8

Question
Bone pathology:
Answer
  • Is an imbalance of osteoclastic and osteoblastic activity.
  • Is the structure of bones at the cellular level.

Question 9

Question
Osteoporosis is the weakening of the bone due to porousness, caused by osteoblastic activity overtaking osteoclastic activity.
Answer
  • True
  • False

Question 10

Question
Weakening of cancellous bone commonly leads to compression fractures.
Answer
  • True
  • False

Question 11

Question
Which of these is not a cause or contributing factor to risk of osteoporosis?
Answer
  • Menopause (decrease in estrogen)
  • Lack of exercise
  • Eating disorders
  • Early use of steroids
  • Excess calcium intake

Question 12

Question
Assign these stages of a fracture with a time frame: A hematoma forms, capillaries growing into it and phagocytes cleaning up debris, [blank_start]immediately[blank_end]. Chondroblasts form a soft procallus of cartilage, [blank_start]within 3 days[blank_end]. Osteoblasts ossify the callus into a bony callus, [blank_start]by 6 weeks.[blank_end] Normal activity remodels the bone in the following weeks, or potentially [blank_start]years[blank_end] until the callus has disappeared (generally in adults.)
Answer
  • almost immediately
  • after 24 hours
  • within 3 days
  • within 3 weeks
  • by 6 weeks.
  • by 6 months
  • years
  • months

Question 13

Question
Not fixing a fracture results in pseudoarthrosis.
Answer
  • True
  • False

Question 14

Question
Which fracture has the most potential risk?
Answer
  • Compound fracture
  • Open fracture
  • Greenstick fracture
Show full summary Hide full summary

Similar

L2+L3 Homeostasis: Principles and Control
Mer Scott
L6 Microscopic (Histological) Bone Tissue Structure
Mer Scott
L5 Structure of the Skeleton
Mer Scott
Characters in "King Lear"
eleanor.gregory
OCR GCSE Latin Vocab flash cards - all
jess99
HRCI Glossary of Terms O-Z
Sandra Reed
Business Studies GCSE
phil.ianson666
Physical Geography
clongworth25
Chemistry unit 2
36jessieh
GCSE Chemistry C1 (OCR)
Usman Rauf
Characters in "An Inspector Calls"
Esme Gillen