Skeletal Muscle

Question 1

Muscle belly is made up of bundles of muscle fibers, surrounded by connective tissue called?

Answer 1

Fasicles

Question 2

A single muscle fibre is made from?

Answer 2

Many fused embryonic cells resulting in a single muscle fiber having multiple nuclei.

Question 3

Inside each fiber is a bundle of ?

Answer 3

Myofibrils

Question 4

Each myofibril contains a series of?

Answer 4

Sacromeres

Question 5

A Sarcomeres contains?

Answer 5

The contractile filaments that convert action potential to muscle force.

Question 6

Thin actin filaments attach where?

Answer 6

At the Z line

Question 7

Thick Myosin filaments anchor where?

Answer 7

At the M line

Question 8

Whole muscle shortening occurs as a result of ?

Answer 8

Filaments overlapping more, pulling the Z lines closer.

Question 9

Whole muscle lengthening occurs as a result of?

Answer 9

Filaments overlapping less, Z lines are further apart.

Question 10

Elastic Filament that anchors myosin to the Z line, contributing to passive force is?

Answer 10

Titin

Question 11

The sliding filament model suggest?

Answer 11

During muscle contraction, the Myosin pulls Actin across shortening the muscle fiber and producing force.

Question 12

Muscle is made up of many bundles of muscle fiber called?

Answer 12

Fascicles

Question 13

Muscle fibers are surrounded by?

Answer 13

Endomysium

Question 14

Muscle fibres are bind together in?

Answer 14

Fasicles

Question 15

Muscle fascicles are surrounded by?

Answer 15

The perimysium

Question 16

Mucles are surrounded by?

Answer 16

Epimysium

Question 17

Muscle fibres are inverted by?

Answer 17

A motor neuron, direct from the spinal cord

Question 18

A motor unit is equal?

Answer 18

one motoneuron, its motor axon and all muscle fibers it innovates

Question 19

When sufficient excitatory input to reach firing threshold occurs?

Answer 19

An action potential is generated

Question 20

Every action potential generated in the motor neuron generates ?

Answer 20

An action potential in the motor units of the muscle fibre

Question 21

Muscle force is altered by?

Answer 21

The number and discharge rate of motor units and contractile properties of the muscle fiber.