Involuntary actions like blood pressure, salivation and vomiting are controlled by the _____.

Medulla

The correct answer is Option (4) – Medulla

Involuntary actions like blood pressure, salivation, and vomiting are primarily controlled by the Medulla.

Explanation:

• The medulla oblongata, often referred to as the medulla, is part of the brainstem located at the base of the brain.
• It plays a crucial role in regulating various involuntary or autonomic functions, including blood pressure, heart rate, respiratory rate, salivation, and reflexes such as vomiting.
• The cerebrum is responsible for higher cognitive functions, and the spinal cord primarily serves as a pathway for transmitting sensory and motor signals.

In summary, the medulla is a key region in the brainstem that controls many essential involuntary actions in the body.