Bones and skeletal systems
A soccer player fractures their femur. What type of bone has been broken
A long bone
A hockey player's shoulder comes out of place after a collision. What injury has occurred?
A dislocation.
Name one major function of muscles besides movement.
Heat production or support/posture.
Which muscle group is located on the back of the upper leg?
Hamstrings.
Name two external forces that can affect athletic performance.
Any two of gravity, friction, air resistance, or water resistance.
Why are ribs considered important for survival?
They protect vital organs such as the heart and lungs.
Which structure connects bone to bone?
A ligament.
What are the three types of muscle tissue in the human body?
Skeletal, smooth, and cardiac muscle.
During elbow flexion, which muscle lengthens while the biceps contract?
Triceps brachii.
What is the name of the connection between a motor neuron and a muscle fiber?
Neuromuscular junction.
What mineral is primarily responsible for making bones strong and hard?
Calcium.
What type of joint is found in the shoulder and hip?
Ball-and-socket joint.
Which type of muscle is under voluntary control?
Skeletal muscle.
During a arm curl, which muscle acts as the prime mover?
Biceps brachii.
What does the equation F = ma represent?
Newton's Second Law of Motion.
Why is bone remodeling important throughout life?
It replaces old bone tissue and helps maintain bone strength.
Which type of joint allows the greatest range of motion in the human body?
A synovial joint.
When lowering a dumbbell during a bicep curl, what type of contraction is occurring in the biceps?
Eccentric contraction.
When performing a bicep curl, does the forearm move toward the muscle's origin or insertion?
Origin.
Which neurotransmitter is released to stimulate muscle contraction?
Acetylcholine.
Which division of the skeleton contains the skull, vertebral column, and rib cage?
The axial skeleton.
What is the main function of synovial fluid?
To lubricate joints and reduce friction.
What type of contraction occurs when pushing against an immovable wall?
Isometric contraction.
During shoulder abduction, which muscle is the primary agonist?
Deltoid.
What is the correct order of the five parts of a reflex arc?
Receptor → Sensory neuron → Interneuron → Motor neuron → Effector.