Second messenger in regulation of metabolism is: Select one: O a. hormones Оb. АТР neurotransmitters O d. Adenylyl cyclase
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- Describe negative feedback inhibition and its significance in metabolism.A chemical named __________is derived from ATP and widely employed as a “second messenger” in cellular signaling.Which of the following statements (s) about the ESA is not true? a) ENS can stimulate the release of hydrochloric acid b) Parasympathetic nerve pathways can stimulate ENS c) ENS operates through local control d) The neuron in the ENS cannot affect motility without being directly linked to the CNS e) ENS consists of sensory and motor neurons
- Ca++ is an extremely important ion in the body. Describe its functions or actions in the following organ systems: a) skeletomuscular system b) nervous system c) cardiovascular system d) endocrine systemNeurotransmitters that are either amino acids or amino acid derivatives are referred to as _____________ .ATPase is an enzyme that can hydrolyse ATP and release the potential energy stored in the phosphate bond. How would a metabolic inhibitor that blocks ATPase function affect the resting potential of nerve cells?
- Which type of enzyme regulation is best for the following situations?(a) An enzyme that becomes overactive during a disease(b) An enzyme needed only when there is low blood glucose(c) An enzyme that springs into action when a traumatic injury occurs(d) An enzyme needed only during adolescenceThe energetic equivalent of two molecules of ATP is used to activate an amino acid, yet only one molecule of ATP is used. Explain.What are examples of endogenous and exogenous enzymes and how do they work (what are they responsible for, how do you control them, etc.)
- Give an example of a feedback mechanism in the human body. Explain your example briefly. Make sure to identify the type of feedback (negative or positive), the receptor, the control center and the effector.Which of the following statements are true? a) Phospholipase C catalyzes the conversion of PIP3 to IP3 and DAG b) PI3K catalyzes the conversion of PIP2 to PIP3 c) Both a and b d) Neither a or bGlycolysis is a degradative pathway of glucose.(a). Out of the four kinase enzymes, indicate which are reversible and which areirreversible reactions.(b). Out of the four kinase enzyme reactions, indicate which ones used ATP andwhich ones produced ATP.
