Muscular System Quiz Overview

These flashcards cover key concepts from the muscular system, including muscle functions, classifications, and anatomical details.

Dorsiflexion

The action of raising the foot at the ankle, primarily performed by the tibialis anterior muscle.

Hamstring Group Composition

From medial to lateral, includes semitendinosus, semimembranosus, and biceps femoris.

Quadriceps Femoris Group Exclusion

The quadriceps group does not include the biceps femoris, which is part of the hamstrings.

Synergist to Adductor Group

The rectus femoris and sartorius act as synergists to the adductor group.

Knee Joint Extensor

The rectus femoris muscle extends the leg at the knee joint.

Hand Movement Muscle

The flexor carpi radialis flexes and abducts the hand.

Forearm Extensor

The triceps brachii muscle extends the forearm.

Deltoid Function

The deltoid is responsible for abducting the arm primarily.

Powerful Agonist of Arm Functions

The latissimus dorsi is a powerful agonist for adduction, medial rotation, and extension of the arm.

Scapula Elevation Muscle

The levator scapulae muscle elevates the scapula.

Voluntary Control of Defecation Muscle

The external anal sphincter muscle provides voluntary control of defecation.

Erector Spinae Positioning

The erector spinae muscles are situated from medially to laterally as spinalis, longissimus, and iliocostalis.

Eye Elevation Muscle

The superior rectus muscle elevates the eye upward.

Lateral Abdominal Wall Muscles (Superficial to Deep)

The external oblique, internal oblique, and transversus abdominis.

Muscle Group for Chewing

The masseter and temporalis muscles are primarily responsible for chewing.

Influence on Skeletal Muscle Appearance

The arrangement of the pattern of fascicles influences the appearance and function of skeletal muscle.

Triangular Shaped Muscle Arrangement

Muscles like the pectoralis major possess a convergent fascicle arrangement.

Directional Term Muscle Example

The adductor longus muscle is named using a directional term.

Muscle Named for Shape

The pronator quadratus muscle is named for its distinctive shape.

Serratus Muscle Description

A muscle with 'serratus' in its name has a serrated or jagged appearance.

Antagonistic Muscle Classification

Muscles like triceps brachii and biceps brachii are classified as antagonists.

Action-Named Muscle

The adductor magnus muscle is named for its action.

Fixator Function in Muscles

A fixator muscle holds a bone in place.

Synergist Definition

A synergist works together with the agonist during muscle contractions.

Fulcrum in Lever System

The fulcrum is the joint at which movement occurs.

First-Class Lever Example

A first-class lever has the fulcrum situated between the force and the load.

Most Common Lever Class in Human Body

Most levers in the human body are classified as third-class levers.

Fulcrum for Triceps Brachii Movement

The elbow joint serves as the fulcrum when the triceps brachii moves the forearm.

Mechanical Advantage of Lever System

A lever system works at a mechanical advantage when the fulcrum is located closer to the applied force.