EXPH 2200 quizzes

During elbow extension, if the hand/weight is lowered FASTER THAN GRAVITY allows it is a(n) _______ contraction in the _______ muscle.

concentric contraction triceps muscle

Activation of a muscle spindle will cause a _______ in the muscle, while activation of a GTO will cause a ________ in the muscle.

contraction relaxation

With respect to bone density, ______ bone has low porosity, 5-30% non-mineralized tissue.

cortical

The wrist moves through the _____ plane about the _______ axis with ulnar deviation.

frontal, sagittal

The Ginglymus (hinge) allows _______ articulation. An example of this would be the ________ joint.

uniaxial articulation humeroulnar joint

The muscles that perform radioulnar supination include all of the following except? a. Anconeus b. Biceps brachii c. Supinator d. Brachioradialis

Anconeus

Which of the following is the sole action of the brachialis muscle? a. Weak flexion of the shoulder b. Flexion of the elbow c. Pronation from supinated position d. Supination from a pronated position

Flexion of the elbow

As a particular muscle contracts, the sarcomeres pull toward the ________.

Gastor

What are the functions of skeletal muscles?

Movement Protection-serves as fluid shock absorber Posture and support Body heat

Elbow stability is locked when at full ________ and unlocked at >______

extension , 20 degrees flexion

Which of the following muscles performs extension of the wrist? a. Palmaris longus b. flexor carpi ulnaris c. flexor pollicis longus d. extensor carpi radialis longus

extensor carpi radialis longus

What motions does a sellar joint move?

flexion extension add/abd circumduction slight rotation

What is a sellar joint?

thumb only

Afferent sensory neurons carry signals ________ the spinal cord while efferent motor neurons carry signals _______ effector muscles

toward toward

The most commonly injured ligament in the elbow due to throwing is the ________.

Ulnar collateral ligament

Which of the following muscles performs adduction of the wrist? a. Palmaris longus b. flexor carpi ulnaris c. flexor pollicis longus d. extensor carpi radialis longus

flexor carpi ulnaris

Tightening a screw with a screwdriver using the right hand depends significantly upon the action of the _____.

Biceps brachii

__________ Corpuscles are only activated by rapid changes in the joint capsule and activation is brief.

Pacinian Corpuscles

What are the functions of bone?

Protection of vital soft tissue Support Muscle attachment RBC production (hematopoiesis) Mineral Storage (Ca+ and P)

The ability of a muscle to return to its original length following stretching is defined as _________

elasticity

The carpal tunnel houses flexor tendons as well as the median nerve. What wrist flexor tendon does not pass through the carpal tunnel, making it an easy tendon to harvest and use during a UCL reconstruction surgery?

Palmaris longus

Of the carpal bones, which articulates with the radius and is critical in transferring force from the hand into the forearm?

Scaphoid

T/F: Neural control of voluntary motion begins in "general" CNS locations and contributes through "specific" CNS locations.

True

When performing a somersault, the body moves in the _______ plane with a(n) _______ axis

sagittal plane med/lat axis