
Concept explainers
Interpretation:
The terms chemical messenger, target tissue and hormone receptor have to be explained.
Concept Introduction:
Chemical messengers: The vital function of body is controlled and coordinated by chemical messengers. Hormones and neurotransmitters are chemical messengers where hormones are released by endocrine systems to the blood whereas neurotransmitters are released by the nerve cells.
Receptors: Receptors is a molecule or a part of molecule which interacts with a neurotransmitter, a hormone or other molecules which are biochemically active so that a response is initiated in a target cell. If a hormone is interacted with the chemical messenger, then it is a hormone receptor.
A cell or a group of cells where the messengers regulate its activity are known as target tissue.

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Chapter 28 Solutions
EP FUND.OF GENERAL,ORG...-MOD.MASTERING
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- Sodium fluoroacetate (FCH 2CO2Na) is a very toxic molecule that is used as rodentpoison. It is converted enzymatically to fluoroacetyl-CoA and is utilized by citratesynthase to generate (2R,3S)-fluorocitrate. The release of this product is a potentinhibitor of the next enzyme in the TCA cycle. Show the mechanism for theproduction of fluorocitrate and explain how this molecule acts as a competitiveinhibitor. Predict the effect on the concentrations of TCA intermediates.arrow_forwardIndicate for the reactions below which type of enzyme and cofactor(s) (if any) wouldbe required to catalyze each reaction shown. 1) Fru-6-P + Ery-4-P <--> GAP + Sed-7-P2) Fru-6-P + Pi <--> Fru-1,6-BP + H2O3) GTP + ADP <--> GDP + ATP4) Sed-7-P + GAP <--> Rib-5-P + Xyl-5-P5) Oxaloacetate + GTP ---> PEP + GDP + CO 26) DHAP + Ery-4-P <--> Sed-1,7-BP + H 2O7) Pyruvate + ATP + HCO3- ---> Oxaloacetate + ADP + Piarrow_forwardTPP is also utilized in transketolase reactions in the PPP. Give a mechanism for theTPP-dependent reaction between Xylulose-5-phosphate and Ribose-5-Phosphate toyield Glyceraldehyde-3-phosphate and Sedoheptulose-7-Phosphate.arrow_forward
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