Exam (elaborations)
biol 373- unit 7 questions with verified solutions
- Course
- Institution
biol 373- unit 7 questions with verified solutions
[Show more]
Content preview
biol 373- unit 7what is metabolism - correct answer ✔✔"set of life-sustaining chemical transformations within the cells
of living organisms"
whether transformations of energy substrates (carbs, fats, proteins) are biased toward
storage/ anabolism or breakdown/ catabolism
how is metabolism regulated - correct answer ✔✔• endocrine - primary role- products of endocrine
pancreas• insulin/glucagon ratio
• neural - regulation of food intake- endocrine pancreas also innervated (autonomic)
ingested biomolecules have what three fates - correct answer ✔✔fuel - metabolized to provide energy
build - synthesis reactions for growth and maintenance of tissues
store - as glycogen (liver, skeletal muscles) or fat
metabolism is divided into what two states - correct answer ✔✔fed / absorptive state - anabolic,
products of digestion being absorbedand used for synthesis or stored; building phase
fasted / postabsorptive state - catabolic, body taps into stores; keeping up glucose or using alternate fuel
nutrient pools for immediate use - correct answer ✔✔mostly circulating in plasma):
• glucose
• free fatty acids
• amino acids
what do enzymes do in fed-state metabolism - correct answer ✔✔In fed-state metabolism under
influence of insulin, enzymeactivity for forward reaction increases.Enzymes for glycogen breakdown are
inhibited
net glycogen synthesis
, favouring the glucose to glycogen pathway
what do enzymes do in fasted-state metabolism - correct answer ✔✔In fasted-state metabolism under
influence of glucagon et al,enzymes that break down glycogen are more active, and enzymesfor glycogen
synthesis are inhibited.
net glucose synthesis
favouring breakdown of glycogen
interconversions of carbohydrate, fat and protein - correct answer ✔✔slide 5 unit 7
always running these cycles to keep ourselves alive
fasted state we are breaking down glycogen and glycerol into the gluconeogenesis pathway and burn
fatty acids to use as fuel and maek acetylcoA
what are three characteristics of fasted (postabsorptive) state metabolism - correct answer ✔✔• under
the control of hormones
• goal is to maintain plasma glucose levels- achieved through pathways that yield glucose or provide ATP
via alternate fuels
• brain is acutely dependent on glucose(can also use ketones)
carbs storage centres for fasted state - correct answer ✔✔liver and muscle
how is glucose stored in liver - correct answer ✔✔glycogen in liver - can be broken down and exported
as free glucose
how is glucose stored and exported in muscle - correct answer ✔✔glycogen in muscle - can NOT be
exported as free glucose- use within muscle, OR- export as pyruvate or lactate liver gluconeogenesis-
glycogen is main source of glucose for fasted state» liver keeps ~4 h supply of glycogen
fats are stored in - correct answer ✔✔liver and adipose tissue?
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller BravelRadon. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67474 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now