51 Questions
Which type of skeleton includes the bones of the skull, neck, and trunk?
Axial skeleton
How many long bones are there in the forearm?
2
Which bones are located in the pectoral and pelvic girdles?
Appendicular skeleton
What is a tuberosity?
A rough area of bone where muscles attach
Which type of tissue is less rigid than bone and located where mobility is required?
Cartilage
How many types of joints are there?
3
Which type of skeleton includes the bones of the lower limbs?
Appendicular skeleton
What is a bony feature?
A functional hole, bump, or groove found on a bone
Which type of skeleton includes the bones of the upper limbs?
Upper limbs
What is a foramen?
A functional hole, bump, or groove found on a bone
Which statement about joints is true?
The more mobile a joint, the more easily it is dislocated.
What is the function of skeletal muscle?
To produce movement by contracting.
Which structure is usually found deep to deep fascia?
Muscle fibers
During contraction, what happens to the origin and insertion of a muscle?
They move closer together.
What is the function of a tendon?
To attach muscle to bone.
What is an aponeurosis?
A flattened tendon.
What are the attachments of the biceps brachii muscle?
Originates from the supraglenoid tubercle of the scapula and inserts into the radial tuberosity and the fascia of the forearm.
What is the innervation of the deltoid muscle?
Axillary nerve
What are the actions of the deltoid muscle?
All of the above
What happens in a stretch reflex?
The motor nerve from the spinal cord passes a message to contract the muscle.
Which type of skeleton includes the bones of the pectoral and pelvic girdles?
Appendicular skeleton
What is a foramen?
A functional hole, bump or groove found on bone
How many long bones are there in the leg?
3
What is the function of cartilage?
To allow for mobility at articulations
Which type of joint is characterized by the presence of synovial fluid?
Synovial joint
Which muscle is responsible for supination of the forearm and flexion of the shoulder and elbow joint?
Biceps brachii
Which nerve innervates the deltoid muscle?
Axillary nerve
Which muscle is the major abductor of the arm?
Deltoid
Which reflex tests the ability to move and power of movement by testing muscle and nerve(s) supplying it?
Stretch reflex
What happens to a muscle without a functioning motor nerve supply?
It can't contract
Which muscle is responsible for supination of the forearm and flexion of the shoulder and elbow joint?
Biceps brachii muscle
What is a foramen?
A functional hole, bump, or groove found on bone
Which muscle is the major abductor of the arm?
Deltoid muscle
How many long bones are there in the leg?
2
How many long bones are there in the forearm?
2
What are the two main divisions of the skeletal system?
Axial skeleton and appendicular skeleton
Name three bones of the upper limb.
Humerus, radius, and ulna
Name three bones of the lower limb.
Femur, tibia, and fibula
What is the function of cartilage?
To provide a less rigid and more flexible support where mobility is required
What are the three types of joints?
Synovial, cartilaginous, and fibrous
What is the difference between muscle strain and paralysis?
Muscle strain refers to an overstretched, torn, or twisted muscle, while paralysis refers to a muscle without a functioning motor nerve supply and cannot contract.
What is spasticity?
Spasticity is a condition in which the muscle has intact and functioning motor nerves, but the descending controls from the brain are not working properly.
What is atrophy?
Atrophy refers to the 'wasting' of muscles through inactivity, causing myocytes to become smaller.
What is hypertrophy?
Hypertrophy is the enlargement of individual myocytes.
What are the two main types of skeletal muscle reflexes?
The two main types of skeletal muscle reflexes are stretch reflex and flexion withdrawal reflex.
What are the two main divisions of the skeletal system?
Axial skeleton and Appendicular skeleton
Name three bones of the upper limb.
Humerus, radius, and ulna
What is the difference between muscle strain and paralysis?
Muscle strain is a muscle injury characterized by overstretching or tearing of muscle fibers, while paralysis is the loss of muscle function and movement due to damage to the nerves or spinal cord.
What are the actions of the deltoid muscle?
The deltoid muscle is responsible for abduction, flexion, and extension of the shoulder joint.
Which structure is usually found deep to deep fascia?
Muscles
What are the attachments of the biceps brachii muscle?
The long head of the biceps brachii muscle originates from the supraglenoid tubercle of the scapula, while the short head originates from the coracoid process of the scapula. Both heads insert distally into the radial tuberosity and the fascia of the forearm via the bicipital aponeurosis.
Study Notes
Skeletal System
- The axial skeleton includes the bones of the skull, neck, and trunk.
- There are 2 long bones in the forearm.
- The pectoral and pelvic girdles contain the scapula, clavicle, pelvis, and sacrum bones.
Bones and Features
- A tuberosity is a bony feature.
- A foramen is a hole in a bone that allows blood vessels or nerves to pass through.
- A bony feature refers to a projection or marking on a bone.
Joints
- There are 3 types of joints: synovial, cartilaginous, and fibrous.
- Synovial joints are characterized by the presence of synovial fluid and are capable of movement.
- All joints contain ligaments, which connect bones to each other.
Muscles and Tendons
- The function of skeletal muscle is to move the body's skeleton.
- Tendons connect muscles to bones and facilitate movement.
- An aponeurosis is a type of tendon that is flat and sheet-like.
- The attachments of the biceps brachii muscle are the scapula, radius, and ulna.
- The innervation of the deltoid muscle is the axillary nerve.
- The actions of the deltoid muscle include abduction, flexion, and extension of the shoulder joint.
Muscle Physiology
- During contraction, the origin and insertion of a muscle swap places.
- A stretch reflex is a rapid, involuntary contraction of a muscle in response to stretching.
- Without a functioning motor nerve supply, a muscle will atrophy.
- Muscle strain refers to a stretched or torn muscle, while paralysis is the loss of motor function.
- Spasticity refers to increased muscle tone, while atrophy is a decrease in muscle size.
- Hypertrophy is an increase in muscle size.
Reflexes
- Reflexes test the ability to move and power of movement by testing muscle and nerve function.
- The two main types of skeletal muscle reflexes are stretch reflexes and Golgi tendon reflexes.
Test your knowledge of the Musculoskeletal (MSK) System with this quiz. Learn about the different bones that make up the axial and appendicular skeleton, as well as the bones in the upper limbs. See how well you can identify and understand the different components of the MSK system.
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