Cellular Messengers & Receptors is part of the General Physiology section of Physiology. Practise 17 exam-style MCQs for NEET PG, FMGE, INI-CET and NEET SS, each with the correct answer and a detailed explanation.
Tyrosine kinase receptors, the cAMP, IP3 and DAG second messengers, and the nuclear receptors of steroid and thyroid hormones headline these Cellular Messengers & Receptors MCQs, which test signal transduction as high-yield NEET PG and INI-CET material.
Tyrosine kinase receptors serves as receptors for, Insulin Insulin like growth factors (IGF-1) Epidermal growth factor (EGF) Nerve growth factor Platelet-derived growth factor Fibroblast growth factor Reference: Ganong 25th edition page No.52
Estradiol acts through nuclear receptor Reference: Ganong 25th edition page No.55
The second messenger systems that are activated through coupling of hormone-receptor complexes by G-protein are: Adenylyl cyclase-cAMP system Inositol triphosphate (IP3) Diacylglycerol (DAG) Calcium (Ca² + ) system Guanylyl cyclase-cGMP system Guanylyl cyclase is the enzyme responsible for formation of nitric oxide. Nitric oxide is the second messenger involved in cell signaling Reference: Ganong 25th edition page No.56
Only the hormones that act through nuclear receptors can influence transcription factors Reference: Ganong 25th edition page No.55
Aldosterone receptor are present in, Kidney Colon Hippocampus Reference: Ganong, 25th edition/page no.369
Ans. A. Alpha action predominantly Epinephrine decreases insulin release via alpha-2 action as pancreatic beta-cells has alpha-2 receptors.
mGluR is the metabotropic receptor of glutamate Reference: Ganong, 25th edition page no.138
Thyroxine hormones have intracellular receptors. Steroid and thyroid hormones bind to the intracellular receptors which regulate gene transcription. The hormone diffuses through the cell membrane into the cytoplasm and combines with the receptor which is present either in cytoplasm or in nucleus. The receptor for glucocorticoid is present in cytoplasm whereas the receptor for thyroxine and other steroid hormones are located in the nucleus. Other options: Option B,C and D: Glucagon, Epinephrine and Parathormone bind to receptors present on the cell membrane. The peptide hormones bind to the cell surface receptors and activate a series of intracellular signal transduction systems.
Tyrosine kinase receptors, the cAMP, IP3 and DAG second messengers, and the nuclear receptors of steroid and thyroid hormones headline these Cellular Messengers & Receptors MCQs, which test signal transduction as high-yield NEET PG and INI-CET material.
MedLadder includes 17 curated MCQs for Cellular Messengers & Receptors under Physiology (General Physiology), covering NEET PG, FMGE, INI-CET and NEET SS preparation.
