EPT2

Question 1

Each muscle fiber is innervated by only one motor neuron

Answer 1

true

Question 2

Slow twitch fibers have the greatest oxidative capacity

Answer 2

true

Question 3

Larger muscles generate more force than smaller muscle

Answer 3

true

Question 4

Larger motor units are recruited when smaller amounts of force are needed

Answer 4

false

Question 5

If the charge inside the cell decreases, the cell is depolarized

Answer 5

false

Question 6

Motor learning can account for as much as 50% of the overall gain in strength

Answer 6

true

Question 7

Chronic hypertrophy is caused by fluid shifts and does not have any real gains in strength

Answer 7

false

Question 8

Muscle size is partly responsible for gains in muscular strength

Answer 8

true

Question 9

One way to improve muscular power is to perform plyometric exercises, which take advantage of the body’s natural reflex response, through the use of the stretch-shortening cycle

Answer 9

true

Question 10

Exhalation of air results in expansion of the rib cage and lungs

Answer 10

false

Question 11

if a motor unit receives an impulse, every muscle that is connected will contract

Answer 11

true

Question 12

During breathing at rest, both inspiration and expiration are active processes

Answer 12

false

Question 13

The absolute refractory period is where the neuron could respond to a stimulus if the stimulation was sufficient

Answer 13

false

Question 14

Resistance training is safe for all individuals, regardless of age, with appropriate safeguards in place

Answer 14

true

Question 15

The amount of oxygen in arterial blood increases from rest to exercise

Answer 15

false

Question 16

The red blood cells are ~98% saturated with oxygen when leaving the lungs

Answer 16

true

Question 17

ATP is needed to break apart the actin and myosin in order to re-orient themselves and create another “power stroke”

Answer 17

true

Question 18

CO2 production is the main driver of increased ventilation

Answer 18

true

Question 19

Chemoreceptors are located in the brain, carotid bodies, and aortic arch and help to increase ventilation

Answer 19

true

Question 20

Individuals with COPD may have their lungs limit their aerobic exercise performance

Answer 20

true

Question 21

The basic unit of the muscle is

Answer 21

Sarcromere

Question 22

Which part of the muscle contains only actin

Answer 22

I band

Question 23

A single motor neuron and all of the muscle fibers it innervates describes

Answer 23

Motor unit

Question 24

As a result of muscular shortening, which part of the muscle stays the same length?

Answer 24

A band

Question 25

Which mineral is involved in the sliding filament theory

Answer 25

Calcium

Question 26

Which neurotransmitter is involved in the sliding filament theory

Answer 26

Acetylcholine

Question 27

Which nervous system is known as “fight or flight”

Answer 27

Sympathetic Nervous System

Question 28

In the sodium-potassium pump, there are__sodium pumped out for every__potassium pumped in

Answer 28

3; 2

Question 29

The place where the a-motor neuron communicates with the muscle fibers is

Answer 29

Neuromuscular junction

Question 30

The definition of muscular strength is

Answer 30

The max force that a muscle or muscle group can generate

Question 31

The speed of a neural impulse is dependent on

Answer 31

Myelinization and axon diameter

Question 32

Bobby comes to you for help developing and implementing a resistance training program so that he can improve muscular strength; he has never done resistance training before. Which of these FITT principles would you select for him.

Answer 32

F: 2-3 days/wk
I: 6-8RM
T: 30 min. per workout
T: 10 exercises (machine weights) that target major muscle groups

Question 33

A protocol that could be used to assess muscular power could be__

Answer 33

Broad jump

Question 34

Varying the training intensity at different time points in the year allows an individual to peak in muscular strength at the appropriate time describes__

Answer 34

Periodization

Question 35

At a given temperature, pressure x volume is constant describes

Answer 35

Boyle’s gas law

Question 36

Respiratory system can limit exercise performance in patient populations

Answer 36

A and B are correct

A. Obstructed airways
(B. Restrictive airways)

Question 37

The right shift of the oxyhemoglobin dissociation curve

Answer 37

Both A and B are correct

A. known as the Bohr effect
(B. Occurs during exercise)

Question 38

The bulk of CO2 is transported via

Answer 38

Bicarbonate

Question 39

Which of the following breathing irregularities increases intra-abdominal and intra-thoracic pressure

Answer 39

Valsalva maneuver

Question 40

The test that allows exercise physiologists to identify whether lungs limit aerobic exercise

Answer 40

Maximal voluntary ventilation