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Flashcards in EPT2 Deck (40)
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1

Each muscle fiber is innervated by only one motor neuron

true

2

Slow twitch fibers have the greatest oxidative capacity

true

3

Larger muscles generate more force than smaller muscle

true

4

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

false

5

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

false

6

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

true

7

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

false

8

Muscle size is partly responsible for gains in muscular strength

true

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

true

10

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

false

11

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

true

12

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

false

13

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

false

14

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

true

15

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

false

16

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

true

17

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

true

18

CO2 production is the main driver of increased ventilation

true

19

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

true

20

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

true

21

The basic unit of the muscle is

Sarcromere

22

Which part of the muscle contains only actin

I band

23

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

Motor unit

24

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

A band

25

Which mineral is involved in the sliding filament theory

Calcium

26

Which neurotransmitter is involved in the sliding filament theory

Acetylcholine

27

Which nervous system is known as "fight or flight"

Sympathetic Nervous System

28

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

3; 2

29

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

Neuromuscular junction

30

The definition of muscular strength is

The max force that a muscle or muscle group can generate