L14

Front 1

The nerve you will dissect (together with the muscle) in this week's lab is named the ___________ nerve.

Back 1

sciatic

Front 2

The muscle to used in the experiment this week is called the ________________.

Back 2

gastrocnemius muscle

Front 3

To measure muscle force, the muscle is attached to a device called a ________ __________ (2 words) that reports a voltage proportional to the force to the A/D converter.

Back 3

tension transducer

Front 4

The tension response to a single stimulus of the nerve is known as a _______________.

Back 4

twitch

Front 5

A single motor neuron and all the muscle fibers that neuron innervates is known as a ________ _________.

Back 5

motor neuron

Front 6

If the nerve is stimulated repetitively, the maximum force produced is __________ (choose more, less, or the same as) the tension generated by a single stimulus.

Back 6

more

Front 7

When examined under the microscope, the muscle contains alternating light and dark bands. The dark band is known as the _____ band. The light band is known as the _____ band.

Back 7

A/ i

Front 8

In the middle of the light band is a line known as the _____ line.

Back 8

Z

Front 9

The repeating unit from one line in one light band to the next line in the next light band is known as the ______________.

Back 9

H zone

Front 10

The muscle contracts in response to stimulation of the nerve because the nerve terminals liberate a neurotransmitter known as _____________, that binds to receptors in the muscle membrane, depolarizes the muscle membrane past threshold, causing it to generate an __________ ___________ (two words).

Back 10

acteylcholine/ action potential

Front 11

The major contractile proteins of muscle are known as ________ and ________.

Back 11

actin and myosin

Front 12

A protein that negatively regulates muscle contraction by preventing interaction between the major contractile proteins is ________________.

Back 12

tropomyosin

Front 13

The negative regulation of filament sliding is owed to the release of ________ ions from the _____________ reticulum.

Back 13

Ca2+/ sarcoplasmic

Front 14

Muscle relaxation occurs when the ______ ions are pumped back into the __________ reticulum.

Back 14

Ca2+/ sarcoplasmic

Front 15

The amount of tension generated by a muscle can be varied by the nervous system by determining the number of simultaneously active ________ units and the _________ at which each of these units is firing.

Back 15

motor/ frequency

Front 16

The maximum response of a muscle to repetitive stimulation is known as a ________.

Back 16

tetanus