Identify the functions that are controlled by the hind brain of human being
- A.Involuntary actions such as blood pressure, salivation, vomiting etc.
- B.Controlling the regions receiving sensory impulses from receptors
- C.Controlling the movement of voluntary muscles
- D.Sensation of hunger or being full
Correct answer
Explanation
The correct answer is A, Involuntary actions such as blood pressure, salivation, vomiting etc. These are controlled by the medulla oblongata, which is part of the hind brain.
The human brain has three main parts: the fore-brain, the mid-brain and the hind-brain. The hind-brain consists of the pons, the medulla and the cerebellum. The medulla controls involuntary actions such as heartbeat, blood pressure, breathing, salivation, coughing and vomiting, while the cerebellum keeps the body's balance and posture and makes voluntary movements precise. The fore-brain, mainly the cerebrum, is the thinking part: it has areas that receive sensory impulses, areas that send commands to voluntary muscles, and a centre for hunger.
B is wrong because the sensory areas that receive impulses from receptors lie in the cerebrum of the fore-brain. C is wrong because the commands that move voluntary muscles start in the motor areas of the cerebrum. D is wrong because hunger and fullness are sensed by a centre in the fore-brain, the hypothalamus.
Exam tip: Medulla for involuntary acts, cerebellum for balance, cerebrum for thinking, senses and voluntary action.
Practice Questions
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