The temporalis muscle, which helps close the jaw, attaches to the which part of the mandible?

Correct Answer: C

Rationale: The temporalis muscle, originating from the temporal fossa, inserts on the mandible's coronoid process, a sharp, anterior projection, elevating the jaw for chewing. 'Turbulance' is a typo or nonsense term, not anatomical. Mandibular condyles articulate with the skull at the TMJ, not the temporalis insertion. Conchae , nasal structures, are unrelated to the mandible. The coronoid process's role as the temporalis's anchor, enhancing bite force, makes 'c' the correct attachment point.

Correct Answer: C

Rationale: The cerebrum, occupying the upper cranial cavity, is the human brain's largest part, comprising about 80% of its mass. Located above the brainstem and cerebellum, it handles higher functions thinking, memory, and voluntary movement via its cerebral cortex, divided into four lobes: frontal (problem-solving), parietal (sensation), temporal (auditory processing), and occipital (vision). Its size and convoluted surface, with gyri and sulci, maximize neuron density, supporting complex cognition unique to humans. The midbrain, a small brainstem segment, relays sensory and motor signals but is far smaller. The medulla oblongata, also brainstem, regulates vital functions like breathing but is compact. The cerebellum, below the cerebrum, coordinates movement and balance, yet its volume is less than the cerebrum's. Neuroanatomy studies quantify the cerebrum's dominance around 1,300-1,400 grams in adults dwarfing other regions, underscoring its evolutionary expansion for intelligence and adaptability, distinct from smaller, specialized structures.

Correct Answer: C

Rationale: Cartilage has a gel-like matrix, a firm, flexible ground substance of chondroitin sulfate and water, supporting structures like the ear or joints without rigidity of bone. Bone has a hard, calcified matrix. Blood is fluid (plasma), not gel-like. Adipose stores fat, with minimal matrix. Cartilage's semi-solid, resilient matrix, distinct from other connective tissues' properties, makes 'c' the correct answer.

Correct Answer: A

Rationale: First-degree burns affect only the epidermis, causing redness and pain (e.g., sunburn), without deeper damage. Second-degree reaches the dermis, blistering. Third-degree destroys both layers, numbing nerves. Fourth-degree extends to muscle/bone, rare. Epidermal-only involvement, per burn classification, makes 'a' correct.

Correct Answer: B

Rationale: A compound (open) fracture breaks through the skin, exposing bone, risking infection (e.g., tibia piercing). Simple stays internal. Stress is microdamage from overuse. Greenstick bends, common in kids. Compound's external breach, per trauma classification, makes 'b' correct.