Question

Right now you are taking this exam and you are nervous. Your adrenal glands are releasing adrenaline to your bloodstream. Adrenaline will cause changes in a variety of cells in your body that have an adrenergic receptor. This is an example of signaling. neuronal paracrine endocrine contact.dependent

Answer 1

##### Answer and Explanation #####

Here the option 3 i.e Endocrine is CORRECT OPTION.

Explanation- Endocrine is the signaling which is utilized in the long distance travelling substances or ligands , like hormones, in this type of signaling Endocrine glands are involved which do help by secreting their hormones but in the blood stream because the endocrine glands do not have the duct, hence also known as Ductless glands.

This hormone i.e adernaline following Endocrine signaling reaches to the target cell and stimulate the pathway, by binding with the respective receptor, according to the ligands.

Further remaining options are irrelevant to the question because-

• Neuronal signaling - Where neurons are involved to convey the message with the help of neuronal electric.
• Paracrine signaling - Here cells are required to be in the less distance , means cells should not be in the long distance.
• Contact-dependent signaling -This signaling is also termed as Juxtracrine signaling, where cell are required to be attached to each other.

Summary- In this way Endocrine signaling is the most relevant answer with explanation .

Thanks