Describe the structure and function of the cerebral arterial circle
What will be an ideal response?
The cerebral arterial circle (also known as the circle of Willis) is a ring-shaped anastomosis that encircles the infundibulum of the pituitary gland. Its anatomical arrangement creates alternate pathways in the cerebral circulation, so that if blood flow is interrupted in one area, other blood vessels can continue to perfuse the entire brain with blood.
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Increased pressure in the eye caused by an accumulation of aqueous humor is called astigmatism.
Answer the following statement true (T) or false (F)
The structure of a testis can be described as composed of
A. about 250 lobules, each of which contains 1 to 4 seminiferous tubules. B. a single very long seminiferous tubule that winds through the structure. C. semen in various stages of development held in seminiferous tubules. D. 1 to 4 lobules, each of which contains about 250 seminiferous tubules.
When injury results from a single large force application, such as a tackle, the injury is usually termed what?
A. acute B. chronic C. repetitive D. all of the above
Exposure to ultraviolet radiation greatly increases the risk of developing
A) heart disease. B) skin cancer. C) glaucoma. D) diabetes.