Which endocrine gland stores its secretion in the extracellular space before discharging it into the blood?

Match the given endocrine gland with its hormones,functions,and deficiency symptoms accurately.

What happens if iodine or thyroxine is added to water containing tadpoles?

An organ $X$ has a large blood supply. It produces a hormone,the lack of which causes a disease known as cretinism. The organ is

On an educational trip to Uttaranchal,Ketki and her friends observe that many local people have swollen necks. Please help Ketki and her friends to find out the solutions to the following questions.
$(a)$ Which probable disease are these people suffering from?
$(b)$ How is it caused?
$(c)$ What effect does this condition have on pregnancy?

Which of the following hormones supports the process of red blood cells formation?