Which statement regarding cortical bone is correct?
Cortical bone is compact and dense
When bone material is far from the centre of the bone, it is the least effective way of resisting bending and twisting loads
The turnover rate is higher in cortical bone than in trabecular bone
Cortical bone accounts for 40% of bone mass
Interstitial lamellae are part of the osteon
Which of the following statements is correct?
The osteon is the fundamental functional unit of trabecular bone
The inorganic part represents 30% of the weight of bone
The bone matrix is composed of type 1 collagen, which gives it its tensile strength
There is no water in cortical bone
Calcium hydroxyapatite is the only mineral part of the inorganic matrix of the bone
Which phenomenon does NOT happen during bone ageing?
Decrease in oestrogen levels
Reduced endosteal bone resorption
Reduced synthesis of vitamin D by the skin
An increase in the RANKL/OPG ratio
Reduced levels of pro-inflammatory cytokines
What is the main difference between cortical and trabecular bone?
20% of bone mass is cortical
20% of bone surface is trabecular
Cortical bone is dense and compact, while trabecular bone has a network structure
Cortical bone is commonly found in the epiphysis
Cortical bone is mainly responsible for metabolism, while trabecular bone provides strength
Which of the following statements is true regarding the differences between woven bone and lamellar bone?
Woven bone has high alignment of collagen fibres
Lamellar bone is formed during embryonic development
Woven bone is mechanistically weak
Cancellous bone is made up of woven bone
Woven bone forms slowly