Objectives:
Describe the microanatomy of tissues in the joints and explain how their structure reflects their function.
Define the three classes of joints and explain how their structure reflects their function.
Hyaline cartilage is the same as articular cartilage.
Fibrocartilage is what the epiphyseal plate is made from.
Fibrocartilage has a different histological structure from hyaline cartilage.
Question 4
Question
Choose the correct statements about cartilage histology.
Answer
The chondrocytes live in lacunae.
Cartilage is composed mainly of collagen fibres.
Cartilage is white due to fatty acids.
Cartilage acquires nutrients via diffusion as it is not vascular.
Question 5
Question
Diffusion of nutrients into cartilage is achieved via 'loading', regular joint movement/activity
Answer
True
False
Question 6
Question
Hyaline cartilage is [blank_start]amorphous[blank_end], with [blank_start]little[blank_end] collagen content, and a [blank_start]high[blank_end] water content, that resists [blank_start]compression.[blank_end]
Fibrocartilage has [blank_start]many[blank_end] bundles of collagen, and resists [blank_start]tension.[blank_end] The orientation of these fibres are aligned in the direction of stress and so it also resists [blank_start]compression[blank_end], making it specialised.
Answer
amorphous
little
high
compression.
many
sparse
tension.
compression
tension
Question 7
Question
Lack of bony congruence is made up for by hyaline cartilage moulding to the articulations of synovial joints.
Answer
True
False
Question 8
Question
Hyaline cartilage remodels.
Answer
True
False
Question 9
Question
The more bony congruence there is, the more soft tissue support is needed.
Answer
True
False
Question 10
Question
The menisci are convexly shaped and diffuse forces through the bones of the knee.
Answer
True
False
Question 11
Question
Choose the incorrect statement.
Answer
Intervertebral discs are made of fibrocartilage.
The nucleus pulposus is a gel like structure which resists compression, and is distributed over the top of the intervertebral disc.
"Slipping a disk" is a tear in the fibrocartilage of the intervertebral disc where the nucleus pulposus has been removed from the proper position.
Question 12
Question
Choose the correct statements about ligaments and tendons.
Answer
They are composed of DFCT.
They have low collagen content.
They are slightly vascularised.
They are maintained by fibroblasts.
Ligaments join muscle to bone at an insertion, facilitating movement.
Tendons join bone to bone, restricting unwanted movement.
Question 13
Question
A lateral ligament will restrict adduction.
Answer
True
False
Question 14
Question
When a tendon is pulled out it usually takes a section of bone with it.