Posture and balance of the body is controlled by:

Explain how the human body responds when adrenaline is secreted into the blood.

Which of the following statements is correct about receptors?

$(a)$ Name the part of the brain which controls:
$(i)$ voluntary actions,
$(ii)$ involuntary actions.
$(b)$ What is the significance of the peripheral nervous system? Name the components of this nervous system and distinguish between the origin of the two.

Name the part of the neuron:
$(i)$ where information is acquired.
$(ii)$ through which information travels as an electrical impulse.

Which of the following hormones requires iodine for its synthesis?