A peptide hormone binds to a G-Protein Coupled Receptor and A. Cause the hormone

Question

A peptide hormone binds to a G-Protein Coupled Receptor and A. Cause the hormone-receptor complex to translocates to the nucleus B. Always cause cell division C. Activates a cascade of activity starting with G-Protein activation D. Is a sign of infection The part of the pituitary that is composed of axons, which originate in the Hypothalamus, and have endings that release hormones instead of neurotransmitters A. Adrenal gland B. Anterior pituitary C. Posterior pituitary D. Islet cells of the pancreas This organ releases hormones in response to hormones secreted by the Hypothalamus into a portal system A. Adrenal gland B. Anterior pituitary C. Posterior pituitary D. Islet cells of the pancreas This is a steroid hormone produced by the Adrenal Cortex and regulates water and Na+ retention A. Cortisol B. Catecholamine C. Aldosterone D. Prednisone

Explanation / Answer

Answer1=C

Any peptide hormone after binding to its receptor on target organs which are attach to G protein leads to activation of this proteinwith exchange of GTP with GDP causing cascade of signaling finally reaching the nucleus and exerting its effects.

Answer2=c

Hypothalamus forms ADH amd oxytocin hormone by itself and send them to poaterior pitutary for their excretion.

Answer3=b

GnRH from hypothalamus causes anterior pitutary to secrete FSH amd LH into portal system

Answer4=c

In reponse to ACTH from anterior pitutary , adrenal cotex (outer part/ glomerulosa) secrete aldosterone which causes sodium and water reabsorption amd potassium excretion.

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