28 Questions
What is the function of the talus bone?
Supports the entire weight of the body with each step
Which type of joint allows for no movement?
Synarthrocic joints
How many pairs of true ribs are there in the ribcage?
7 pairs
What type of joint has a rounded end of one bone that fits into a cup-like structure on another bone?
Ball and socket joint
What is the function of the sternum?
Protects the heart and lungs
What is the main function of bursae in joints?
To reduce friction between bones
What is the weakest bone in the lower leg?
Fibula
Which type of diarthrocic joint is characterized by angular movement in one plane?
Hinge joint
What type of movement is characterized by a bone rotating on another bone?
Rotation
What is the name of the process at the bottom of the sternum?
Xiphoid process
What is the type of joint that has a fibrocartilage pad between bones?
Amphiarthrotic joint
What is the name of the fluid secreted by the inner membrane of the synovial joint?
Synovial fluid
What type of motion involves a decrease in the angle between the bones of a joint?
Flexion
What is the term for the movement of a body part towards the midline of the body?
Adduction
How many skeletal muscles are present in the human body?
640
What is the term for the part of a muscle attached to a movable bone?
Insertion
What is the purpose of muscle contraction in regulating body temperature?
To generate heat
What is the role of T-tubules in muscle contraction?
To carry the impulse inside the muscle cell to the sarcoplasmic reticulum
What is the process by which acetylcholine is removed from the synapse?
By being broken down by enzymes
What is the function of acetylcholine in muscle contraction?
To bind to receptors on the muscle membrane, generating an impulse
What is the role of Ca++ ions in muscle contraction?
To allow myosin to attach to actin, producing muscle contraction
What is a motor unit?
A motor neuron and the muscle fibers it stimulates
What is the function of the perimysium in a muscle?
Covering of a fascicle
What is the functional unit of a myofibril?
Sarcomere
What is the role of myosin in muscle contraction?
Pulling actin towards the center of the sarcomere
What is the site of muscle contraction?
Sarcomere
What is the purpose of the endomysium?
Covering of a muscle cell
What is the function of acetylcholine in the neuromuscular junction?
Stimulating muscle contraction
Test your knowledge of the bones in the lower limb, including the femur, patella, tibia, fibula, tarsals, calcaneus, and talus. Learn the functions and characteristics of each bone in the lower leg and foot. Identify the bones that support the body's weight and understand their relationships with each other.
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