Lab 2-Muscles

Front 1

The impulse travels via numerous _____________ down through the ____________ to the sarcoplsmic reticulum where it causes the release of calcium ions.

Back 1

trnverse tubules; sarcoplasm

Front 2

Because you can exert conscious cotrol over skeletal muscle, it is sometimes referred to as voluntary muscle.

Back 2

voluntary muscle

Front 3

The end of the muscle that anchors to a bone which does not move when the muscle contracts is called the ____________.

Back 3

origin

Front 4

The end attached to a bone which is moved by contraction is called the muscle's ____________.

Back 4

insertion

Front 5

___________ is defined as a decrease in the angle between two bones.

Back 5

Flexion

Front 6

____________ refers to an increase in the angle between two bones.

Back 6

Extension

Front 7

_____________ is the movement of a bone away from the midline of the body,

Back 7

Abduction

Front 8

___________ is the movement of a bone toward the midline of the body.

Back 8

Adduction

Front 9

In the contraction of skeletal muscles experiment, the ________________ was used.

Back 9

flexor digitorum superficialis

Front 10

Each motor unit has a different _____________, or minimal stimulus that must be reached before contraction will occur.

Back 10

threshold

Front 11

A skeletal muscle needs to be able to generate a wide range of contractile forces or a _______________.

Back 11

graded response

Front 12

_______________ happens when more more motor units are stimulated, muscle strength increases until all motor units are contracting.

Back 12

Multiple Motor Unit Summation

Front 13

____________ is when you can increase the strength of contraction by increasing the rate at which we send stimuli to a muscle.

Back 13

Temporal summation

Front 14

A sustained muscle contraction is called ___________.

Back 14

tetany