Spinal astrocytoma arises from astrocytic glial cells in the cord parenchyma and are the second most common spinal cord tumor in adults.

DWS.jpg What pathology is seen in the axial T2 and coronal T1 images that results from a partial dysgenesis of the vermis?

What is the most common benign spinal lesion found incidentally on MRI?

MS.jpg This pathology is characterized by the destruction of the lipid and protein layer called the myelin sheath that insulates the axon part of the nerve cell. What pathology is seen in the image?

In which age group are juvenile nasopharyngeal angiofibromas most commonly found?

In the case of a cerebral abscess, what T1 signal change is observed after the intravenous administration of contrast material?

MUM.jpg The pathology seen in the nasal side of the right eye in this T2 weighted axial image is the most common primary tumor of the adult eye:

What type of imaging is useful in detecting hippocampal sclerosis linked to epilepsy?

The walls of the alveoli are extremely thin and are covered in a dense network of tiny blood vessels (capillaries). Explain how these two structural features are perfectly suited for the alveoli’s job. (2 marks)  

A plant’s epidermal tissue is like its protective outer skin. It covers the leaves, stem, and roots. For 2 marks, describe two major problems a plant would have if it had no epidermal tissue. (Hint: think about water and germs and bugs)