139 Questions
Question 1
Multiple Choice
What is the primary function of osteoclasts in bone tissue?
Question 2
Multiple Choice
Which process describes the conversion of DNA into mRNA?
Question 3
Multiple Choice
What is the structural difference between RNA and DNA?
Question 4
Multiple Choice
Which gland type releases its product by pinching off the apical portion of the cell?
Question 5
Multiple Choice
What is the function of the epiphyseal plate?
Question 6
Multiple Choice
Which of the following is a non-membranous organelle?
Question 7
Multiple Choice
What is the primary difference between intramembranous and endochondral ossification?
Question 8
Multiple Choice
Which hormone is responsible for lowering blood calcium levels?
Question 9
Multiple Choice
What is the role of the lacunae in bone tissue?
Question 10
Multiple Choice
What characterizes a symport transport mechanism?
Anatomy
Flashcards generated with inquiziti.com. Cut along the dashed lines. Fold in half on the solid line.
What is the primary function of osteoclasts in bone tissue?
Bone resorption and remodeling
Which process describes the conversion of DNA into mRNA?
Transcription
What is the structural difference between RNA and DNA?
RNA contains ribose and uracil, while DNA contains deoxyribose and thymine
Which gland type releases its product by pinching off the apical portion of the cell?
Apocrine gland
What is the function of the epiphyseal plate?
Allows for longitudinal bone growth
Which of the following is a non-membranous organelle?
Ribosome
What is the primary difference between intramembranous and endochondral ossification?
Intramembranous forms bone from fibrous membranes, while endochondral replaces hyaline cartilage
Which hormone is responsible for lowering blood calcium levels?
Calcitonin
What is the role of the lacunae in bone tissue?
Houses osteocytes
What characterizes a symport transport mechanism?
Two substances move in the same direction across the membrane
What structure connects the lacunae to each other and to the central canal in bone tissue?
Canaliculi
Which of the following is a characteristic of the reticular layer of the dermis?
Contains dense connective tissue
What is the term for the flattened sacs lined with synovial membrane that reduce friction in joints?
Bursae
What is the result of excessive twisting of a bone?
Spiral fracture
Which layer of the epidermis contains cells that are less viable due to distance from nutrients?
Stratum spinosum
What is the role of calcitonin in bone remodeling?
Inhibits bone resorption
Which type of joint is the articulation of a tooth with its bony alveolar socket?
Gomphosis
Which of the following is an inorganic component of bone matrix?
Hydroxyapatites
What is the term for the bone marking that is a large, blunt, irregularly shaped process?
Trochanter
Which layer of the dermis contains lines of cleavage?
Reticular layer
What is the primary function of the epiphyseal plate?
Longitudinal bone growth
Which movement decreases the angle between two bones?
Flexion
What is the term for a fracture where the bone is crushed?
Compression
Which cells are responsible for secreting osteoid during bone formation?
Osteoblasts
What is the term for the area of skin supplied by a single spinal sensory nerve root?
Dermatome
Which of the following is a characteristic of synovial joints?
Presence of a fluid-filled cavity
What is the term for the bone marking that is a narrow, slitlike opening?
Fissure
Which bone is classified as an irregular bone?
Vertebrae
What is the term for the process of converting hyaline cartilage into bone?
Endochondral ossification
Which layer of the epidermis has 25 or more layers of dead, shingle-like cells?
Stratum corneum
What is the function of the periosteum?
Covers the outer surface of compact bone
Which type of joint movement involves moving a limb away from the midline?
Abduction
What is the term for the mass of clotted blood that forms after a bone fracture?
Hematoma
Which cells are responsible for synthesizing melanin?
Melanocytes
What is the term for the bone marking that is a raised area above a condyle?
Epicondyle
Which layer of the epidermis contains three to five layers of flattened cells with laminated granules?
Stratum granulosum
What is the term for the bone marking that is a sharp, slender, often pointed projection?
Spine
Which hormone is responsible for regulating keratinocyte production?
Epidermal growth factor
What is the term for the joint movement that involves turning a bone around its own axis?
Rotation
Which layer of the epidermis is only found in the palms of the hands and soles of the feet?
Stratum lucidum
What is the primary function of Langerhans cells in the epidermis?
Immunologic defense via phagocytosis
Which dermal layer contains the majority of the skin's collagen and elastic fibers?
Reticular layer
What is the specific term for the clotted blood mass found in a bruise?
Hematoma
Which bone marking is described as a shallow depression, often serving as an articular surface?
Fossa
What is the structural unit of compact bone known as?
Osteon
Which cells are responsible for secreting the organic matrix of bone, known as osteoid?
Osteoblasts
During endochondral ossification, what happens to the chondrocytes in the center of the hyaline shaft?
They hypertrophy and die, causing the matrix to calcify
Which hormone stimulates osteoclast activity to increase blood calcium levels?
Parathyroid hormone
What type of fracture involves the bone breaking into many fragments?
Comminuted
Which of the following is an example of an irregular bone?
Vertebrae
What is the functional classification of a suture joint?
Synarthroses
Which synovial joint feature consists of a flattened sac lined with synovial membrane to reduce friction?
Bursae
What type of movement is described as 'drawing around' in a conical shape?
Circumduction
Which cells in the epidermis are associated with sensory nerve fibers for touch perception?
Merkel cells
What is the primary component of the inorganic matrix of bone?
Hydroxyapatites
Which layer of the epidermis contains laminated granules with waterproofing glycolipids?
Stratum granulosum
What are the canals that run at right angles to the central canal in an osteon called?
Perforating canals
Which type of ossification forms the clavicles and most skull bones?
Intramembranous ossification
What is the name of the process where bone ends are realigned via surgery?
Open reduction
Which of the following is a multiaxial synovial joint?
Scapula/humerus
What is the specific term for the skin markings caused by dermal folds near joints?
Flexure lines
Which pigment, derived from Vitamin A, accumulates in the stratum corneum?
Carotene
What is the primary role of the periosteum during bone repair?
Providing osteoblasts and osteoclasts for callus formation
Which joint type is characterized by an articulation between a tooth and an alveolar socket?
Gomphoses
What is the term for the area of skin supplied by a single spinal sensory nerve root?
Dermatome
Which bone marking is a large, blunt, irregularly shaped process found only on the femur?
Trochanter
What are the spaces where mature osteocytes reside called?
Lacunae
Which hormone inhibits bone resorption and promotes calcium deposition in the bone matrix?
Calcitonin
What is the primary function of the fibrocartilaginous callus in bone repair?
Connecting bone ends with a mass of repair tissue
Which of the following is a characteristic of a synovial joint?
Fluid-filled joint cavity
What is the name of the bone marking that is a sharp, slender, often pointed projection?
Spine
Which epidermal layer contains many layers of cells and tonofilaments but less mitosis?
Stratum spinosum
What causes the skin to have a bronze coloration in Addison's disease?
Hypofunction of the adrenal cortex
What is the function of the canaliculi in bone tissue?
Connecting lacunae to each other and the central canal
Which type of bone growth involves the formation of new osteons on the external surface?
Appositional growth
What is the term for a fracture where the bone breaks along the vertical axis?
Linear
Which joint is an example of a biaxial movement?
Radius/carpal
What is the primary role of mast cells in the dermis?
Producing heparin and histamine
What is the term for the process of blood cell production in bone marrow?
Hematopoiesis
Which layer of the epidermis is the thickest, consisting of 25+ layers of dead cells?
Stratum corneum
What is the name of the fibrocartilaginous discs found in some synovial joints?
Menisci
What is the result of excessive ultraviolet light exposure on elastin fibers?
Solar elastosis
Which bone marking is a narrow, slitlike opening?
Fissure
What is the term for the area between older mineralized bone and the new osteoid seam?
Calcification front
Which of the following is a cartilaginous joint that is slightly movable?
Pubic symphysis
What is the primary function of the papillary layer of the dermis?
Indenting the epidermis to provide nutrients and sensory receptors
What happens to the medullary cavity during longitudinal bone growth?
It elongates as osteoclasts digest the newly formed spongy bone
Which of the following is a characteristic of a simple fracture?
Bone breaks cleanly without penetrating the skin
What is the function of the synovial membrane in a synovial joint?
Secretes synovial fluid to lubricate the joint
Which epidermal cell type functions as a sensory receptor for touch?
Merkel cell
What is the primary function of the epiphyseal plate?
Longitudinal bone growth
Which hormone acts to decrease blood calcium levels?
Calcitonin
Which type of joint allows for the greatest range of motion?
Multiaxial
What is the correct order of biological organization from smallest to largest?
Atom, molecule, cell, tissue, organ
Which subatomic particles determine the mass number of an element?
Protons and neutrons
What characterizes an isotope?
Same atomic number but different mass number
Which type of chemical reaction involves the breaking of bonds to release energy?
Decomposition reaction
What is the primary function of a phospholipid in the cell membrane?
Forming the bilayer structure
Where does transcription occur within a eukaryotic cell?
Nucleus
Which organelle is classified as non-membranous?
Ribosome
What is the role of tRNA during translation?
Delivering amino acids to the ribosome
Which type of muscle tissue is striated and involuntary?
Cardiac muscle
What is the main function of the dendrites in a neuron?
Receiving signals from other neurons
Which plane divides the body into superior and inferior portions?
Transverse plane
What is the function of osteoclasts?
Bone resorption
Which type of gland secretes its product by rupturing the cell?
Holocrine gland
What is the definition of a solution with a pH of 8?
Weakly basic
Which structure connects bone to bone?
Ligament
What is the primary difference between facilitated diffusion and active transport?
Active transport requires energy
Lines of cleavage
They are regions where collagen fibers are oriented in parallel bundles, which are clinically significant for surgical incisions to minimize scarring.
Intramembranous ossification
It involves the direct transformation of mesenchymal tissue into bone, typically forming flat bones like the skull.
Parathyroid Hormone (PTH)
It stimulates osteoclast activity to increase blood calcium levels when they fall below homeostatic range.
Epiphyseal plate
A layer of hyaline cartilage where longitudinal bone growth occurs, which eventually ossifies into the epiphyseal line.
Isotopes
Atoms of the same element that possess the same number of protons but differ in the number of neutrons, resulting in different mass numbers.
Facilitated diffusion
A passive transport process where substances move down their concentration gradient through specific transmembrane proteins.
Transcription
The process occurring in the nucleus where DNA serves as a template to synthesize a complementary strand of mRNA.
Holocrine glands
Glands that release their secretion by the rupture and destruction of the entire secretory cell.
Osteon
The fundamental functional unit of compact bone, consisting of concentric lamellae surrounding a central canal.
Translation
The process where the sequence of codons on mRNA is used to determine the sequence of amino acids in a protein.
Redox reaction
A chemical reaction involving the transfer of electrons between two species, where one is oxidized and the other is reduced.
Membranous organelles
Organelles enclosed by a lipid bilayer membrane, such as the mitochondria, lysosomes, and the endoplasmic reticulum.
Symport
A type of secondary active transport where two different substances are moved across the membrane in the same direction.
Langerhans cells
Dendritic cells found in the stratum spinosum that function as macrophages to ingest foreign substances and activate the immune system.
Activation energy
The minimum amount of energy required to initiate a chemical reaction, which enzymes lower to increase reaction rates.
Endochondral ossification
The process where bone replaces a hyaline cartilage model, characteristic of long bone development.
Atomic number
The number of protons in the nucleus of an atom, which defines the identity of the element.
Osteoclasts
Large, multinucleated cells responsible for the resorption and breakdown of bone matrix.
Triglycerides
Lipids composed of one glycerol molecule and three fatty acid chains, primarily used for long-term energy storage.
Nonaxial movement
Slipping movements where bones glide past each other without rotation around an axis.
Sagittal suture
The articulation point between the two parietal bones along the midline of the skull.
Osmosis
The diffusion of water through a selectively permeable membrane from an area of higher water concentration to lower water concentration.
Merkel cells
Sensory receptors located in the stratum basale that associate with nerve endings to detect light touch.
Tertiary structure of proteins
The overall three-dimensional shape of a single polypeptide chain, determined by interactions between R-groups.
Mass number
The total count of protons and neutrons in the nucleus of an atom.
Exocytosis
The process by which a cell expels substances by fusing a vesicle with the plasma membrane.
Apocrine glands
Glands that release their secretion by pinching off the apical portion of the cell, which then pinches off into the duct.
Complementary bases
The specific pairing of nitrogenous bases in DNA and RNA, such as adenine with thymine or uracil, and guanine with cytosine.
Flexure lines
Dermal folds that occur at or near joints where the dermis is tightly secured to deeper structures.
Canaliculi
Tiny canals that connect lacunae to each other and to the central canal, allowing for nutrient and waste exchange.