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Explain the following terms:
(i)Constitutive and induced enzymes
(ii)Metabolic regulation
(iii)Product inhibition
(i) Constitutive enzymes are the ones that are produced in the cell regardless of environmental conditions.Induced enzymes are the ones that are produced only under the effect of certain factors.(ii)...
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Describe how the high level of cholesterol metabolism can be regulated: a. At the transcriptional level (Sterol dependent regulation)b. At the hormonal level
a. In mammals, intracellular levels of cholesterol and fatty acids are controlled through a feedback regulatory system mediated by a family of transcription factors called sterol regulatory element-binding proteins (SREBPs)....
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What are the different role of sugar neuclotides in the biosynthesis of glycogen? Briefly describe
In a wide range of organisms, excess glucose is converted into polymeric forms for storage and transport. The principal storage forms of glucose are glycogen in vertebrates and many microorganisms,...
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What hormone, when injected into virgin female rats, causes them to exhibit maternal behaviors, such as building a nest?
thyroxine
oxytocin
insulin
adrenocorticotropic hormone
oxytocin
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Why is it that in evolutionary tree birds never give rise to mammals but birds are the closest to mammals?
Birds' bodies are coated in feathers. No animals have feathers, yet the majority of them have hairy skin. Finally, birds lay eggs, hard-shelled eggs to be precise. Mammals give birth...
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Describe the actions and regulation of the adrenal hormones, including their role in helping the body respond to stress
The hypothalamus produces corticotropin-releasing hormone (CRH) that stimulates the pituitary gland to secrete adrenocorticotropin hormone (ACTH). ACTH then stimulates the adrenal glands to make and release cortisol hormones into the...
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what is the role of hormonal regulation, cardiovascular center regulation and autoregulation of blood pressure. Explain.
Short-term regulation of blood pressure is controlled by the autonomic nervous system. Changes in blood pressure are detected by baroreceptors. These are located in the arch of the aorta and...
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what is the best ph level for our skin?
7 or 5.5?
the higher the ph level, what is the benefit and disadvantage of it?
the lower the ph level, what is the benefit and disadvantage of it?
5.5 the higher the ph level and the lower the ph level can burn skin,so the best ph level is 5.5 .
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Why do cells need to store glucose in the form of glycogen and what is the structural advantage of glycogen for animals as compared to either amylose or amylopectin?
Glycogen is more highly branched than amylopectin and amylose. The advantage of glycogen’s highly branched structure is that the multiple ends are where enzymes start to cleave off glucose molecules....
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