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Barry BMS Cancer Biology Exam 1 Questions and Answers
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EXS 344 FINAL EXAM QUESTIONS ANDANSWERS
homeostasis is best defined as... - Answers -organ systems, tissues, cells, and
molecules working to regulate internal environment
The study of how the body's structures and functions are altered when exposed to acute
and chronic exercise is an appropriate definition of... - Answers -exercise physiology
An example of an acute response to exercise might be... - Answers -a change in heart
rate from 62 bpm at rest to 155 bpm during a 220 yd run
How was expired air collected to measure oxygen and carbon dioxide using a chemical
gas analyzer? - Answers -A Douglas bag
Muscle biopsy, a technique originally used in the early 1900s to study muscular
dystrophy, was later introduced in the mid-1960s as a method for studying - Answers -
muscle biochemistry
According to Jim Pawelczy, what is the exciting component of exercise physiology? -
Answers -The steps of metabolic processes like oxygen utilization in the body
Which is not part of the "P four" medicine? - Answers -Persistent (P four= Personalized,
Predictive, Preventative, Participatory)
Which of the following is the study of the expression of genes at the messenger RNA? -
Answers -transcriptomics
Which of the following is NOT included in the EXPERIMENTAL DESIGN of a research
study? - Answers -hypothesis
Most people achieve their highest aerobic capacity when tested with the use of... -
Answers -treadmill
Which of the following statements is true when comparing the use of treadmills and
cycle ergometers for exercise testing? - Answers -Cycle ergometers are better for
assessing aerobic capacity in trained cyclists.
Which of the following is considered the most appropriate device for evaluating changes
in submaximal physiological function before and after training in people whose body
weight has changed? - Answers -a cycle ergometer
,A research design examining the effect of a single treatment on groups of participants
aged 21 to 30 years, 31 to 40 years, and 41 to 50 years is an example of... - Answers -a
cross-sectional design
Which of the following can alter the body's acute response to exercise? - Answers -all
the choices are correct (choices- environmental temp, sleep, participant's last meal)
The horizontal axis of every graph is reserved for... - Answers -the independent variable
Which of these is the correct order of skeletal muscle hierarchical organization, from
largest structure to smallest structure? - Answers -entire muscle, muscle fasciculus,
muscle fiber, myofibril
Which of the following is NOT performed by the plasmalemma? - Answers -storing
Ca2+ions to enable contraction
Ca2+ions (essential for contraction) are stored in the.. - Answers -sarcoplasmic
reticulum
How is an action potential carried deep into the muscle fiber? - Answers -T-tubules
What is the basic functional unit of a myofibril? - Answers -sarcomere
The A-bands of the sarcomere represent areas of... - Answers -thin and thick filaments
Thin filaments are often named for which protein? - Answers -actin
A protein that allows the muscle to function as if it has an internal spring is... - Answers -
titin
Which protein shields the myosin-binding site, preventing contraction from happening at
rest? - Answers -tropomyosin
The process of muscle contraction involves which ion? - Answers -Ca2+
Which protein is sensitive to Ca2+ and thereby helps initiate contraction? - Answers -
troponin
The process of plasmalemma depolarization (increase in membrane potential) involves
which ion? - Answers -Na+
Why is it necessary to have an action potential (electrical signal) in the muscle for
contraction? - Answers -The SR will release Ca2+only if it has been electrically
stimulated.
, ATP is required for... - Answers -both muscle contraction and muscle relaxation
The theory that states that muscle fibers contract when thick and thin filaments slide
past each other is called the _________________ theory. - Answers -sliding filament
At rest which energy source provides the majority of the body's energy? - Answers -
Carbohydrates and fat contribute almost equally
The relative percent contribution of fat and carbohydrate utilization during physical
activity depends on the exercise _________. - Answers -intensity
Carbohydrate serves as fuel for ATP production... - Answers -during short-duration,
high-intensity exercise
The brains only energy source is... - Answers -Carbohydrates
During resting conditions where is extra glucose stored? - Answers -Both in the liver
and cytoplasm of muscle cells
Many marathon runners "hit the wall" around mile 20. What does this tell you about
glycogen? - Answers -Glycogen stores are mostly depleted by mile 20.
ATP production from fat is ____________ ATP production from glucose. - Answers -
slower than
To be available for cellular metabolism fat must first be reduced from its complex form
triglyceride. What part of triglyceride is used to form ATP? - Answers -Free fatty acids
(FFAs)
Protein can serve as an energy substrate in the case of severe energy depletion or
starvation if... - Answers -it is first converted to glucose
Which of these sets of factors determines the rate of ATP production? - Answers -
substrate availability, enzyme activity
The enzyme that is critical in determining the rate of energy production through a given
metabolic pathway is called the ___________________ enzyme. - Answers -rate-
limiting
How do products of a metabolic pathway typically help control the rate of the chemical
reactions? - Answers -negative feed back on the rate-limiting enzyme
ATP + water + ATPase = - Answers -ADP + Pi + energy
The release of energy for PCr is catalyzed by - Answers -creatine kinase
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