Integumentary System
What is the main function of melanin in the skin?
Protects against UV light
What type of bone is the sternum?
Flat bone
Which protein forms the thick filament in a muscle fiber?
Myosin
Endochondral ossification begins with what type of cartilage?
Hyaline cartilage
What is the function of synovial fluid in a joint?
Lubrication & shock absorption
What cell type is the most abundant in the epidermis?
Keratinocyte
Which hormone has a greater effect on calcium levels: Calcitonin or Parathyroid hormone?
Parathyroid hormone
What neurotransmitter binds to receptors at the motor end plate?
Acetylcholine
Which bone is NOT a facial bone: Maxilla, Mandible, Temporal, Zygomatic, Nasal?
Temporal
The elbow is classified as which type of joint?
Hinge joint
What secretion traps debris and lubricates the ear canal?
Cerumen
What type of cartilage is found in intervertebral discs?
Fibrocartilage
What is the dark band in a sarcomere called?
A band
Which bone is involved in no articulation but part of the axial skeleton?
Hyoid bone
What type of motion is adduction?
Movement toward body midline
True or False: Urea is a component of sweat.
True
What is the last fontanel to close?
Anterior fontanel
What is the "kiss muscle"?
Orbicularis oris
Which structure houses osteons: compact or spongy bone?
Compact bone
What structure connects muscle to bone?
Tendon
What are the functions of fingernails? (name two)
Protect fingertips, help grasp
Where does hematopoiesis occur?
Red bone marrow
What does the term "biceps" in a muscle name mean?
Two tendons of origin
How many rib pairs articulate with the sternum (directly or indirectly)?
10 pairs
A joint in the body serves as a ______ for movement.
Lever