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bio chap 6 questions

front 1

during a contraction, muscles are first....

back 1

excitable

front 2

what are skeletal muscle groups that work together to create the same movement called?

back 2

synergistic muscles

front 3

stimulation of acetylcholine release cause skeletal muscles to become?

back 3

to generate an electric impulse

front 4

In order for a muscle contraction to occur, cross bridges must form between...

back 4

thin and thick filaments

front 5

For a skeletal muscle to contract, what must occur?

back 5

it must be activated by a nerve and

have the presence of calcium

front 6

when an electrical impulse traveling along a motor neuron arrives at a neuromuscular junction what happens?

back 6

acetycholine is released from the nerve terminal

front 7

the primary energy source used by muscle cells to generate ATP is?

back 7

glucose

front 8

isotonic muscle contractions occur when?

back 8

a muscle shortens while maintaining a constant force.

front 9

During a marathon, runners will use of ATP and glucose early in the race. which energy source is generally used next for producing ATP?

back 9

stored glycogen

front 10

At the end of the contractile period, energy from the breakdown of ATP is used to?

back 10

transport calcium back into the sarcoplasmic reticulium so the relaxation can occur.

front 11

T, or transverse, tubes in skeletal muscle function to...

back 11

to store ionic calcium

front 12

what is a characteristic of an isotonic muscle contraction but not an isometric muscle contraction.

back 12

isometric do not cause muscle movement. isotonic does

front 13

give me examples of isotonic contractions

back 13

lifting light or heavy objects

front 14

after intense exercise, your body attempts to overcome oxygen debt by what?

back 14

your body takes in excess oxygen.

front 15

after electrical stimulation of a muscle cell, calcium functions to...

back 15

diffuses into the cell cytoplasm and then comes in contact with the myofibrils where it sets in motion a chain of events that leads to contraction.

front 16

a myogram is a recording of what?

back 16

of muscle activity

front 17

which muscles would one expect to find motor units made up of only a few muscle cells?

back 17

where fine control is essential.

front 18

fast twitch fibers tend to rely on what for quick bursts of energy?

back 18

creatine phosphate and anaerobic metabalism

front 19

what increases in the body as a result of aerobic training?

back 19

lactid acid

front 20

what are the differences between smooth and cardiac muscle?

back 20

the cardiac muscles surround the heart. smooth muscle covers other areas like ducts, tubes and cavities of your digestive, urinary, respiratory and genital systems. Smooth muscle is also found in the skin and eyeball.

front 21

during aerobic exercise the target heart rate should be maintained for at least how many minutes in order to train the body?

back 21

20 minutes

front 22

what are the differences between all three muscle types?

back 22

cardiac has striated appearance

smooth muscle has no striations

cardiac and smooth muscles are involuntary and are able to contract on their own.

front 23

muscle soreness that occurs after jogging down a hill results from what?

back 23

release of lactic acid.

front 24

intercalated discs contain what?

back 24

Intercellular junctions

front 25

what do anabolic steroids do to your body?

back 25

to increase muscle mass, and muscle strength, it can cause a lot of negative things to happen as well. it increases your risk of heart attack or stroke. and severe liver disease.