In some cases of head injuries, the cerebrum may be affected. this type of injury could cause a loss of and impaired

The correct answer is loss of senses and impaired speech.

Explanation:

The largest part of the human brain, that is, the cerebrum or the cortex, is associated with higher activities like thought and action. The mentioned part of the brain monitors voluntary movement, speech, memory, emotion, sensory processing, and intelligence. In the conditions like an injury to the head leads to loss of senses and trouble with thinking and learning.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.