Skin
What is the major layer of the skin that is the most superficial
epidermis
What bone that protects your brain?
What is skull
Which bone cell builds new bone?
Osteoblast
What muscles surround your heart?
Cardiac
What neurotransmitter starts a muscle contraction?
Acetylcholine
Which protein is found in high content in hair and nails
Keratin
The upper arm bone
What is humerus
Describe the structure of compact bone
What proteins are muscles made of?
Actin and Myosin
Name an involuntary use of our muscles
Breathing, digesting, blinking
This type of gland secretes oil
Sebaceous gland
Another name for the shoulder blade
What is scapula
In the center of the osteon is a canal-what is its name?
Haversian Canal
What holds bone to bone?
Ligaments
Name 3 voluntary movements that use our muscles.
Walking, talking, running, jumping, waving, writing, eating
This cell is responsible for pigment production
Melanocyte
The collar bone -- between your shoulder and neck is called
What is clavicle
Osteocyte
What holds your muscles to your bones?
Tendons
What is a sarcomere?
A contraction unit.
The role of the arrectorpilli muscle
contract the hair for goosebump
The breastbone -- middle of your chest
What is sternum
The chamber surrounding the bone cell that holds fluid
Lacunae
Names two functions of the muscular system.
Movements, posture, stabilizes joints, generates heat
What is the role of the ATP in a muscle contraction?
Energy