Malignant brain tumors directly damage brain tissue by
A) compression and infiltration.
B) oversecreting glutamate, which in turns kills adjacent glial cells.
C) oxygen deprivation.
D) inducing hemorrhage.
E) releasing oxygen radicals into brain tissue.

Question

Quizplus · Accepted Answer

Malignant brain tumors can directly damage brain tissue through compression or infiltration. The tumor can compress and push against healthy brain tissue, causing damage. Infiltration occurs when the tumor cells invade and infiltrate the surrounding brain tissue, causing damage to the healthy cells. This can also make it difficult to completely remove the tumor through surgery.

Option B is incorrect because glutamate is a neurotransmitter that is released by neurons and not by tumors. Option C is incorrect because although oxygen deprivation can cause damage to brain tissue, it is not a direct effect of malignant brain tumors. Option D is incorrect because inducing hemorrhage is not a common way in which malignant brain tumors directly damage brain tissue. Option E is also incorrect because although oxygen radicals can cause damage to brain tissue, it is not a direct effect of malignant brain tumors.

Malignant Brain Tumors Directly Damage Brain Tissue by