Exercise Physiology Exam #1 Study Guide

What factors must be considered to accurately describe the response to exercise?

Intensity, duration, and modality of the exercise.

True or False: Relative sub-maximal exercise tasks are universally challenging for individuals of varying fitness levels.

False; because relative sub-maximal exercise is catered to individual % of a 1-RM.

What are criterion tests?

Tests that directly measure physiological variables under strict criteria with precise measurement methods; considered the 'Gold standard'.

What do field tests provide?

An assessment of an individual’s exercise performance under real-world conditions.

Agility is an example of which type of physical fitness?

Sport Related fitness.

True or False: Muscle fiber damage from exhaustive eccentric exercise stimulates glycogen resynthesis when carbohydrates are ingested.

False; significant damage can delay glycogen synthesis.

True or False: Eliminating fat from an athlete’s diet improves physiological and performance variables.

False.

What excess intake can lead to impaired immune function and decreased absorption of iron and copper?

Zinc.

What does the first law of thermodynamics state?

Energy can neither be created nor destroyed, but can change forms.

How long can skeletal muscle at rest store enough ATP to sustain maximal contraction?

Approximately 3 seconds.

True or False: Pyruvic Acid is the universal or common intermediate in the metabolism of carbohydrates, fat, and protein.

False; this refers to Acetyl CoA.

What is Glycogenolysis and what is Glycogenesis?

Glycogenolysis is the breakdown of stored glycogen; Glycogenesis is the formation of glycogen from glucose.

What is the most important rate-limiting enzyme in the Krebs cycle?

Isocitrate Dehydrogenase.

What is the most important rate-limiting enzyme in Glycolysis?

Phosphofructokinase.

What is the most important rate-limiting enzyme in Electron Transport/Oxidative Phosphorylation?

Cytochrome Oxidase.

ATP is produced in glycolysis and the Krebs cycle by __________, but by __________ in the electron transport chain.

Substrate-Level Phosphorylation; Oxidative Phosphorylation.

What process must fatty acids undergo to convert to Acetyl CoA?

Beta-oxidation.

True or False: When the rate-limiting enzyme in a metabolic pathway is inhibited, every step beyond that point is also inhibited.

True.

True or False: Alactic anaerobic metabolism, the phosphagen system, and the ATP-PC system are different terms for the same process.

True.

True or False: Lactic anaerobic metabolism, the glycolytic system, and the LA system are all separate individual metabolic pathways.

False.

What is the time point at which aerobic and anaerobic energy contribution to ATP production becomes approximately equal in maximal exercise?

75 seconds.

True or False: At physiological pH, 99% of lactic acid is immediately dissociated into lactate anion and hydrogen ion.

True.

True or False: Muscle cells can consume and produce lactate at the same time.

True.

Which energy system has the highest capacity for energy production?

O2 system.

Which energy system has the highest power for energy production?

ATP-PC System.

Which energy system has intermediate power for energy production?

LA system.

What is an acceptable field test to indicate anaerobic alactic power?

Vertical Jump.

What is the only step of cellular respiration that occurs in the cytoplasm?

Glycolysis.