PN CHAP 9 FILL IN Flashcards

Vocabulary flashcards based on lecture notes covering skeletal muscle anatomy, physiology, and specific muscle functions.

Skeletal muscles

Described as stricted and voluntary.

Somatic motor neuron

The stimulation of this neuron is necessary for the contraction of skeletal muscles.

Calcium binding to troponin

The action required in order to expose the myosin-binding sites on actin.

Cross bridges

Force-generating structures formed by the binding of the myosin head to actin.

Actin and myosin

Contractible proteins that form force-generating cross-bridges and sliding filaments.

Pumping of calcium back into the sarcoplasmic reticulum

The process that normally terminates muscle contraction.

I-tubules

Structures that carry the electrical signal to the interior of the muscle.

Ribosomes

The cell structures whose purpose is to synthesize the contractile proteins, actin and myosin.

Recruitment

When a stronger force of muscle contraction develops causing additional motor unit stimulation.

Acetylcholinestera

The substance that degrades ACh.

Curasc

Blocks the postjunctional NM receptors causing paralysis of a muscle.

Creatine Phosphate

One energy source for muscle contraction.

Levator Palpebrae Superioris

The muscle whose insertion is responsible for the opening of the upper eyelid.

Biceps brachii

The muscle that has its insertion on the radius.

Masseter, temporalis, and Buccinator

The three muscles concerned with eating.

Rectus femoris

The muscle that flexes the hip at the thigh.

Gastrocnemius and Solcus

The muscles that cause plantar flexion.

Deltoid muscle

The muscle located superior to the diaphragm.

Rotator Cuff

The muscle that stabilizes the shoulder joint.

Quadriceps femoris

A muscle that flexes the leg at the knee and extends the thigh at the hip.

Myoglobin

A substance that stores and transports oxygen.