Prepare for NEET Biology Locomotion And Movement (Skeletal System) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert guidance to examine bone types, axial and appendicular skeleton.
NEET Questions / Zoology / Locomotion And Movement / Skeletal System
A patient presents with brittle bones, decreased bone density, and a history of fractures. Genetic analysis reveals a mutation affecting the function of osteoblasts. Which of the following is the MOST likely consequence of this mutation?
Increased bone resorption by osteoclasts
Reduced bone matrix synthesis and mineralization
Excessive cartilage formation at the epiphyseal plates
Enhanced calcium absorption in the intestines
Which of the following accurately describes the role of the periosteum in fracture repair?
Secretes synovial fluid to lubricate the fracture site
Provides cells that differentiate into osteoblasts and chondroblasts, contributing to callus formation
Absorbs excess calcium from the blood to promote bone hardening
Stimulates osteoclast activity to remove damaged bone fragments
A rare genetic disorder leads to defective collagen synthesis specifically within the intervertebral discs. Which of the following is the MOST likely direct consequence of this disorder?
Increased bone density in the vertebrae
Reduced ability of the discs to withstand compressive forces
Inflammation of the synovial joints
Accelerated bone growth in the limbs
Which structural feature distinguishes the atlas vertebra from other cervical vertebrae, enabling its unique articulation with the skull?
Presence of a prominent spinous process
Absence of a vertebral body and presence of lateral masses
Fusion with the axis vertebra to form a single unit
Presence of a bifid spinous process
A child presents with bowed legs, muscle weakness, and delayed growth. Biochemical analysis reveals low levels of vitamin D and calcium. Radiographic examination of the bones is MOST likely to reveal which of the following?
Increased bone density and thickening of the cortical bone
Decreased bone mineralization and widening of the epiphyseal plates
Premature closure of the epiphyseal plates
Excessive bone resorption by osteoclasts
During endochondral ossification, the primary ossification center forms in the diaphysis of the long bone. Which specific event initiates the formation of this ossification center?
Deposition of calcium salts in the cartilage matrix
Invasion of blood vessels into the cartilage model, bringing osteoprogenitor cells
Proliferation of chondrocytes at the epiphyseal plate
Formation of the periosteal bone collar
Which of the following is NOT a function of the skeletal system?
Support and framework for the body
Protection of vital organs
Production of hormones
Mineral storage
What is the primary component of bone tissue?
Cartilage
Keratin
Collagen and calcium phosphate
Ligaments
Which type of bone is primarily found in the limbs?
Short bones
Flat bones
Irregular bones
Long bones
What is the function of the rib cage?
Support the head
Protect the spinal cord
Protect the lungs and heart
Facilitate movement of the limbs
