This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2018, Subject name: Physiology
IGF-1 acts through which of the following receptors? 
Select and explain. 
A. Cytokine related receptor, B. G protein couple receptor, C. Tyrosine kinase receptor, D. Nuclear or cytoplasmic
C: Tyrosine kinase receptor
Answer: C: Tyrosine kinase receptor 
Explanation: - Hormones that use receptor tyrosine kinase - Fibroblast growth factor (FGF) Hepatocyte growth factor (HGF) Insulin like growth factor - I (IGF-I) Vascular endothelial growth factor (VEGF) P - prolactin I - insulin G - growth hormone.