Describe the components of a freely movable joint, and give their functions. What happens when there is inflammation of the joint?
What will be an ideal response?
To keep the compact bone at the end of the two bones that articulate from grinding on each other, they are covered with cartilage. There is also a sac, the synovial membrane, which contains the joint, and it is filled with synovial fluid. Smaller sacs filled with fluid are called bursae, and they protect the joint where skin, tendons or ligaments rub over the bones. Ligaments hold the articulating bones together. Inflammation of the synovial sac causes arthritis, bursae may also become inflamed, and this is called bursitis.
You might also like to view...
The purpose of the fermentation process is the
A) regeneration of NAD+. B) generation of additional energy in the form of ATP. C) generation of additional reducing equivalents. D) production of novel compounds, such as inorganic acids. E) all of the above
14C is heavier than 12C because it has ____
a. two more electrons than 12C b. two more neutrons than 12C c. two more protons than 12C d. two more protons and two more electrons than 12C e. one more proton and one more neutron than 12C
Which of the following terms describes a substance formed by the combination of two or more elements in definite proportions?
a) compound b) isotope c) nucleus d) enzyme
MPF activity was discovered when cytoplasm from a Xenopus M-phase cell was injected into Xenopus oocytes, inducing the oocytes to form a mitotic spindle
In a control experiment, Xenopus interphase cytoplasm was injected into oocytes and shown not to induce the formation of a mitotic spindle. Which of the following statements is not a legitimate conclusion from the control experiment? (a) The piercing of the oocyte membrane by a needle is insufficient to cause mitotic spindle formation. (b) An increased volume of cytoplasm is insufficient to cause mitotic spindle formation. (c) Injection of extra RNA molecules is insufficient to cause mitotic spindle formation. (d) Components of an interphase nucleus are insufficient to cause mitotic spindle formation.