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WorksheetsDP SEHS A.2.3 Energy systems 1
Total questions: 20
Worksheet time: 10mins
What systems does the body rely on for energy production to sustain life and physical activity?
Phosphagen, glycolytic, and oxidative systems
Digestive, respiratory, and circulatory systems
Nervous, endocrine, and immune systems
Skeletal, muscular, and integumentary systems
What is required for the body to return to homeostasis after exercise?
Increased carbohydrate intake
Excess post-exercise oxygen consumption (EPOC)
Decreased water intake
Increased protein intake
In which type of cells are mitochondria most important for energy provision?
Red blood cells
Muscle cells
Bone cells
Fat cells
What is the role of the matrix in mitochondria?
Site of glycolysis
Contains enzymes for the Krebs cycle
Stores ATP
Transports electrons
What does ADP stand for?
Adenosine diphosphate
Adenosine triphosphate
Adenosine monophosphate
Adenosine tetraphosphate
What is required for exercise lasting longer than 2 seconds?
Oxygen
ATP from other sources
Protein
Fat
What are energy systems in muscle cells responsible for?
Storing fat
Generating ATP
Building proteins
Transporting oxygen
What is the immediate energy source for muscles?
Liver glycogen
Muscle glycogen
Blood glucose
Fatty acids
Which process is responsible for breaking down glycogen into glucose?
Glycolysis
Glycogenolysis
Glycogenesis
Gluconeogenesis
What is the primary function of glycogen in the body?
Store energy
Build proteins
Transport oxygen
Synthesize lipids
What is the initial substrate in aerobic glucose oxidation?
Pyruvate
Acetyl CoA
Glucose
NADH
What is the significance of the electron transport chain in aerobic respiration?
It breaks down glucose
It produces ATP
It converts pyruvate into acetyl CoA
It releases carbon dioxide
In which part of the mitochondria are the enzymes of β-oxidation located?
Outer membrane
Inner membrane
Matrix
Intermembrane space
Can PCr be used directly to drive muscle contraction?
Yes
No
Only in the presence of oxygen
Only during rest
Which hormone is secreted in response to rising glucose levels?
Glucagon
Insulin
Epinephrine
Cortisol
What is the role of GLUT4 in skeletal muscle cells?
It breaks down glucose.
It helps glucose get into the muscle cells.
It stores glucose in the liver.
It converts glucose to fat.
What is the function of insulin in the context of GLUT4?
It acts as a barrier.
It serves as a 'key' to open GLUT4 doors.
It breaks down glucose.
It stores glucose in the cells.
What is the process called when glucose is converted to glycogen?
Glycolysis
Gluconeogenesis
Glycogenesis
Lipolysis
What is the primary energy source used by muscle cells during muscular contraction?
Glucose
ATP
Oxygen
Protein
What system dominates energy provision at the start of exercise?
The aerobic system.
The glycolytic system.
The anaerobic system.
The oxidative system.
