The Skeletal and muscle system

The sternocleidomastoid, named for its connection points, attaches to the sternum, mastoid process of the skull and _____:

Clavicle

The Pelvic Girdles does NOT include:

Coccyx

Fontanelles are:

Areas of connective tissue between bones of an infant's skull

What compound provides energy for muscle movement?

Atp

One of the largest and most powerful muscles in the body is this muscle, which is used to lower the knee and move the thigh back, as when getting ready to kick a ball

Gluteus maximus

A partial break of a bone where only one side is damaged is termed a(n):

Greenstick fracture

All skeletal muscles are highly vascularized, meaning they:

Have a rich blood supply

Where are lacunae found?

Spongy and compact bone

Superficial muscles differ from deep in that:

Superficial muscles are located closer to the skin

A muscle's origin is:

The attachment site to the skeleton which does not move during contraction

The skeletal system does not include:

axial skeletal muscles

Nodding your head 'yes' means that you are performing

both flexion and extension

Which of the following is a flexor of the forearm?

brachialis

Skeletal muscles are grouped into fascicles, which are truly

bunches of muscle fibers

What is the action of the masseter?

chewing

Orbicularis oris is an example of _____ arrangement:

circular

Which of the following is a paired bone in the pectoral girdle that is superior to the ribcage?

clavicle

Muscles like the Pectorais Major start wide but come to a single, large attachment point are an example of _____ arrangement:

convergent

The thoracic and abdominal cavities are separated by the _____:

diaphragm

The shaft of a long bone is also known as:

diaphysis

You are weight lifting and lower the weight from your chest towards your waste. This is which type of muscle contraction for your biceps (muscles of the upper arm)?

eccentric contraction

What lines the medullary cavity of bones?

endosteum

The region of growing hyaline cartilage found at the junction of the diaphysis of a long bone and its epiphysis is termed a(n):

epiphyseal plate

The muscles of the superficial posterior compartment of the forearm share a common action. These muscles all act in _____:

extension of the wrist, hand, and digits

This group of abdominal muscles is named for its "down and in" direction which mimics putting your hands in your pockets:

external obliques

The occipital bone is an example of a ________ bone

flat

What limits the range of motion around a joint, such that damage to the area is prevented?

ligaments

The main muscle involved in chewing food is the:

masseter

The muscle associated with the lips and speech is _______:

mentalis

The muscle associated with the eye is ___________:

orbicularis oculi

The cells that build new boney tissue are called:

osteoblasts

The functional unit of boney tissue is called:

osteon

In humans _____ is a good example of elastic cartilage:

outer ear

Which type of joint allows for rotation around an axis, as seen in the side-to-side rotation of the head?

pivot

Muscles involved in movement of the thumb contain the specialized label:

policis

Thin and thick filaments are organized into functional units called ________.

sarcomeres

The cytoplasm found in muscle cells is termed:

sarcoplasm

Pennate muscles are known for their ability to generate:

short movement with high tension

Muscle that has a striped appearance is described as ________.

striated

Which of the following types of muscle are non-striated and involuntary?

Smooth muscle

The striations seen in skeletal muscle are created by the particular arrangement of filaments of:

Actin and myosin

A chemoelectrical signal that can travel along cell membranes in a wave-like pattern is a(n):

Action potential

The unpaired bone of the upper arm distal to the shoulder is the:

Humerus

In the Sliding Filament Model of muscle contraction, what happens to the A band during this process?

It stays the same width

The prime mover muscle responsible for flaring of the nostrils is the:

Nasalis

A ballerina pointing her toes downward relies on this movement:

Plantar flexion

When a muscle atrophies, which of the following occurs?

The number of sarcomeres and myofibrils decrease

The muscles that move the femur originate at which of the following?

The pelvic girdle

An agonist is:

The principle muscle involved in an action

In terms of isotonic contractions, a concentric contraction is defined by:

The shortening of a muscle to move a load

Hyperextension occurs when:

There is excessive extension of a joint beyond its normal range of motion

What is the function of the vertebral foramen?

To allow passageway of the spinal cord

What is a function of a skeletal foramen

To allow the passage of blood vessels

Which of the following abdominal muscles would be most useful during childbirth?

Transversus abdominus

What material can be found in the medullary cavity of bones?

Yellow bone marrow

The origin of the facial muscle responsible for smiling is the:

Zygomatic bone

Lifting an arm laterally away from the body is a movement termed:

abduction

A chemoelectrical signal that can travel along cell membranes in a wave-like pattern is a(n

action potential

The supinator is involved in rotation of the forearm and causes it to face which direction?

anterior

Muscles associated with the great toe contain the specialized label

hallucis

Movement of the eye "down and in" toward the nose is the function of the ______:

inferior rectus

This structure passes through an opening in the diaphragm:

inferior vena cava

This muscle is named for its bony origin and position at the front of the lower leg:

tibialis anterior

This shoulder-shrugging muscle is named for its unusual shape:

trapezius