From a list of skeleton functions, identify which is or is not a function of the skeleton (RBC storage).
RBC storage is NOT a function of the skeleton; skeleton functions include structure, protection, movement, mineral storage, and hematopoiesis (RBC production).
The type of tissue osseous tissue belongs to.
connective tissue.
The type of bone a vertebra belongs to.
irregular bones.
The name of the bone cells before and after becoming enclosed in lacunae.
Osteoblasts before enclosure; osteocytes after they are enclosed in lacunae.
Name the precursor connective tissue type that is replaced by bone in endochondral ossification.
Hyaline cartilage.
Whether all ribs articulate with the sternum.
False
Whether maintaining the voice resonance is a function of the paranasal sinuses.
True
Whether the ischium is posterior to the pubis and inferior to the ilium.
True
The average number of bones in the adult skeleton.
206
From a list of bones, identify which belongs/does not belong to the axial skeleton.
Axial skeleton includes skull, vertebral column, ribs, and sternum; limb bones do not belong.
Bones that are not part of the axial skeleton include the limbs and girdles
The reason why an adult human doesn’t have the same number of bones as a child.
Some bones fuse together during growth, reducing the total number in adults.
Definition of a sesamoid bone.
A bone formed within a tendon; example: patella.
The anatomical term referring to a hole in a bone.
Foramen
From a list of bones, identify the one that belongs/does not belong to the appendicular skeleton.
The appendicular skeleton includes the bones of the arms, legs, pectoral girdle (shoulder), and pelvic girdle (hips)
The name of the immovable joints connecting most of the skull bones.
Sutures
From a list of skull bones, identify the one(s) with/without sinuses
With sinuses: frontal, maxilla, sphenoid, ethmoid.
Without
sinuses: parietal, temporal, occipital.
17. From a list of skull bones, differentiate between facial vs cranial ones
Cranial bones protect the brain and form the braincase, while facial bones structure the face, support the upper jaw, and enclose the sensory organs
The name of the bony structure that houses the pituitary gland and the name of the bone comprises that structure
Sella turcica of the sphenoid bone.
From a list of skull bones, differentiate between single vs paired ones
Single bones are located in the midline of the skull, while paired bones exist as a left and right symmetrical counterpart.
The definition of a fontanelle
A soft membranous gap between cranial bones in an infant’s skull.
From a list of skull bones, identify the bones that do/do not contribute to the wall of the orbit
The bones that do contribute to the orbit are the frontal, sphenoid, zygomatic, ethmoid, lacrimal, maxilla, and palatine bones. Bones that do not contribute include the nasal, vomer, and temporal bones, which are located elsewhere in the skull.
Identifying the bone that is adjacent to both the coronal and lambdoid sutures
Parietal bone.
From a list of skull bones, Identify the bone that forms the bulk of the hard palate
Maxilla (palatine process).
From superior to inferior of a child vertebral column, identify the number of individual vertebrae of each type.
7 cervical, 12 thoracic, 5 lumbar, 5 sacral, 4 coccygeal (33 total before fusion).
From a list of paired bones, identify the pair that belongs to both the thoracic cage and the pectoral girdle.
Clavicles
Identifying rib # 7 according to the classification of the rib type
True rib (vertebrosternal).
Identifying the type of vertebra with bifid spinous process
Cervical vertebrae (C2–C6).
Identifying the bones that the costal cartilages connect together
Ribs to sternum.
Identifying the bones of the antebrachium
Radius and ulna.
Identifying the bone that has the glenoid cavity and the bone with which the glenoid cavity articulates.
Scapula (has glenoid cavity); articulates with humerus.
A fall from a bike resulted in breaking the medial bone of antebrachium; this means that the fracture involved what bone.
Ulna
. The name of the bones making the palm of your hand.
Metacarpals
From a list of bones identify the sesamoid one
Patella
The definition of articulation
A joint; the point where two or more bones meet.
Whether fibrous joints are joints at which two bones are united by hyaline cartilage.
False
The name of the joint between the left and right parietal bones
Sagittal suture.
From a list of tissues, identify which is/is not an anatomical component of a synovial joint
Components: articular cartilage, synovial membrane, joint capsule,
synovial fluid, ligaments.
Not components: epiphyseal plate, periosteum.
Whether hinge joints, such as the tibiofemoral joint, are monoaxial.
True
From a list of joints, identify which is/is not a type of the six synovial joints
Six types: plane, hinge, pivot, condylar, saddle, ball-and-socket.
The type of finger movement required when cupping your hands to hold some water and limit its leaking through your fingers
Adduction of fingers.
The type of movement required while standing looking up at the stars
Hyperextension of the neck.
The type of movement you are performing If you stand on tiptoes to reach something high
Plantar flexion.
The type of wrist movement required, when you show your palm to someone who is in front of you, as if to tell him "Stop”
Supination (of the forearm/wrist).
The type of movements performed, respectively, when tipping the soles of the feet medially, so they face each other, and tipping them out laterally so they face away from each other.
Inversion (medial) and eversion (lateral).
The two articulating bones that make the jaw joint
Mandible and temporal bone (temporomandibular joint).
The name of the fibrocartilage pad between the medial condyle of the femur and the medial condyle of the tibia
Medial meniscus.
The cruciate ligament that prevents hyperextension of the knee
Anterior cruciate ligament (ACL).
The suture that separates the temporal bones from the parietal bones.
Squamous (squamosal) suture.
The term best describes muscle fibers arranged in bundles
Fascicle
The name of the tissue sheet that separates individual muscle fibers from each other
Endomysium
The name of myofilament that runs through the core of a thick filament anchoring it to a Z disc
Titin
The cellular organelle of a muscle fiber that represents the sarcoplasmic reticulum
Terminal cisternae
The names of the components of the triad of a muscle fiber
One T-tubule + two terminal cisternae
The structure that marks the boundaries of a sarcomere
Z discs
The term that describes the alternating pattern of light and dark bands in a skeletal muscle
Striations
The regulatory protein that acts as a calcium receptor in a skeletal muscle cell
Troponin
The number of somatic motor neurons stimulating one muscle fiber
One
The effect of acetylcholine-receptor binding on the permeability of sarcolemma to Na+
Increases Na⁺ permeability (opens ligand-gated Na⁺ channels)
Cross bridges form between what structures & their binding sites on actin myofilaments
Myosin heads and actin active sites
The part of the muscle cell along which the action potential is propagated
Sarcolemma
The structure along which action potential enters the depth of the muscle fiber
T-tubules
The single most important ion in the human body
Calcium (Ca²⁺)
The major ion contributing to the membrane resting potential (MRP)
Potassium (K⁺)
Whether the resting membrane potential (RMP) value is -70 volts
False
Whether the generation of the resting membrane potential is due to the difference in ionic concentrations across the cell membrane
True
The threshold value for the initiation of action potential
A: –55 mV
The extent/range of depolarization of the resting membrane to trigger action potential
A: From –70 mV to –55 mV (≈ 15 mV change)
Whether the depolarization of the membrane (sarcolemma) continues beyond the initiation of action potential
True
The membrane potential value when Na+ gates close during muscle contraction
About +30 mV
The effects of acetylcholine binding on its sarcolemma receptors on: the direction of sodium movement
Sodium moves into the cell
The effects of acetylcholine binding on its sarcolemma receptors on: the membrane status
Membrane depolarizes
The name of the contraction unit of a skeletal muscle cell
Sarcomere
The type of Na channels/gates that respond to acetylcholine at the neuromuscular junction
Ligand-gated Na⁺ channels
The extent/range of depolarization of the resting membrane when Na gates are closed
From –70 mV to about +30 mV
The event/process that restores the resting membrane potential back to its normal value following muscle contraction
Repolarization (K⁺ efflux)
The process/mechanism that restores the ionic concentration of Na & K back to their normal values following muscle contraction
Na⁺/K⁺ ATPase pump