Unit 3 Exam

Which of the following is a typical rule of skeletal muscle activity?

• Muscles push bones to create movement

• Muscles pull bones across joints to create movement

• Muscles push joints to stabilize posture

• Muscles act independently of bones

Which term best describes the muscle primarily responsible for producing a specific movement?

• Antagonist

• Agonist

• Synergist

• Fixator

The muscle that opposes or reverses the action of another muscle is called the:

• Synergist

• Fixator

• Agonist

• Antagonist

When the angle between two bones decreases, what type of joint action is occurring?

• Extension

• Flexion

• Rotation

• Abduction

Abduction of the arm occurs in which anatomical plane?

• Sagittal plane

• Transverse plane

• Frontal (coronal) plane

• Oblique plane

Which of the following movements occurs in the sagittal plane?

• Hip abduction

• Shoulder flexion

• Forearm pronation

• Trunk rotation

Which of the following is NOT a common criterion for naming skeletal muscles?

• Location

• Number of origins

• Person who discovered the muscle

• Shape

Which of the following correctly identifies the origin, insertion, and primary action of the deltoid muscle?

• Origin: Clavicle and scapula; Insertion: Deltoid tuberosity of humerus; Action: Arm abduction

• Origin: Sternum and clavicle; Insertion: Humerus; Action: Arm adduction

• Origin: Scapula; Insertion: Radius; Action: Forearm flexion

• Origin: Clavicle; Insertion: Scapula; Action: Shoulder elevation

Which bones articulate to form the elbow joint?

• Humerus, scapula, clavicle

• Humerus, radius, ulna

• Scapula, clavicle, humerus

• Radius, ulna, carpals

Which muscle is the primary mover for elbow flexion?

• Triceps brachii

• Deltoid

• Biceps brachii

• Pectoralis major