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