HSC 308 Exam 1 Questions and Answers – Updated 2024
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Course
2024/2025
Institution
2024/2025
HSC 308 Exam 1 Questions and Answers
– Updated 2024
What is a motor unit - Answer-A motor neurom and all fibers it innervates
Describe the role of calcium during muscle contraction - Answer-Ca2+ binds to troponin, the
troponin Ca2+ complex moves allowing myosin and actin to bind
What is the ...
What is the relation between calories, kcals, and Calories - Answer✔✔-1,000 calories = 1kcal = 1
Calorie
Where are the main carbohydrate stores in the body - Answer✔✔-- Liver
- Blood
- Muscle
Where are the main fat stores in the body - Answer✔✔-- stomach
- brain
What is the mass action effect of substrate metabolism - Answer✔✔-More available substrate =
higher pathway activity
Describe the role of enzymes in metabolic pathways - Answer✔✔-Facilitate the breakdown of
substrates and lower the activation energy for a chemical reaction
Describe ATP breakdown - Answer✔✔-ATP + Water + ATPase -> ADP + Pi + energy
Describe ATP synthesis - Answer✔✔-ADP + Pi + energy -> ATP (via phosphorylation)
ATP-PCr energy system - Answer✔✔-Used to reassemble ATP, yields 1 mol ATP/1 mol PCr,
produces PCr and creatine kinase, end product is phosphate and energy
Glycolytic energy system - Answer✔✔-Used to breakdown glucose via glycolysis, yields 2 to 3
mol ATP/1mol substrate, glucose will convert to glucose-6-phosphate, end product is pyruvic
acid
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