Nursing practice questions with comprehensive rationales
NurseDive Free Nursing Practice Question
Opposition is the movement of any bone in the body that opposes another bone in the body.
A. True
Opposition is a specific movement that occurs primarily in the thumb. It refers to the ability of the thumb to touch the tips of the other fingers, allowing grasping and manipulation. This movement involves the thumb opposing the fingers, hence the term.
B. False
False is incorrect because opposition is a well-defined movement in anatomy, particularly in the hand.
C. Only in the lower limbs
D. Only in the spine
This question is an excerpt from Nurse Dive's nursing test bank - Anatomy and physiology proctored exam. Take the full exam now
Full Explanation
Choice A reason: Opposition is a specific movement that occurs primarily in the thumb. It refers to the ability of the thumb to touch the tips of the other fingers, allowing grasping and manipulation. This movement involves the thumb opposing the fingers, hence the term.
Choice B reason: False is incorrect because opposition is a well-defined movement in anatomy, particularly in the hand.
Similar Questions
The protein that acts as a calcium receptor in skeletal muscle is:
A. Actin
Actin is a structural protein that forms the thin filaments in muscle fibers. It interacts with myosin during contraction but does not bind calcium directly or initiate contraction.
B. Tropomyosin
Tropomyosin is a regulatory protein that blocks the myosin-binding sites on actin in a relaxed muscle. It shifts position when calcium binds to troponin, but it does not itself bind calcium.
C. Titin
Titin is a large elastic protein that helps maintain the structural integrity of the sarcomere and contributes to passive elasticity. It does not function as a calcium receptor.
D. Troponin
Troponin is the correct answer. It is a regulatory protein complex that binds calcium ions during muscle contraction. This binding causes a conformational change that moves tropomyosin away from actin’s binding sites, allowing myosin to interact with actin and initiate contraction.
E. Dystrophin
Dystrophin is a structural protein that connects the cytoskeleton of muscle fibers to the extracellular matrix. It plays a role in muscle integrity but does not bind calcium or regulate contraction.
Full Explanation
Choice A reason: Actin is a structural protein that forms the thin filaments in muscle fibers. It interacts with myosin during contraction but does not bind calcium directly or initiate contraction.
Choice B reason: Tropomyosin is a regulatory protein that blocks the myosin-binding sites on actin in a relaxed muscle. It shifts position when calcium binds to troponin, but it does not itself bind calcium.
Choice C reason: Titin is a large elastic protein that helps maintain the structural integrity of the sarcomere and contributes to passive elasticity. It does not function as a calcium receptor.
Choice D reason: Troponin is the correct answer. It is a regulatory protein complex that binds calcium ions during muscle contraction. This binding causes a conformational change that moves tropomyosin away from actin’s binding sites, allowing myosin to interact with actin and initiate contraction.
Choice E reason: Dystrophin is a structural protein that connects the cytoskeleton of muscle fibers to the extracellular matrix. It plays a role in muscle integrity but does not bind calcium or regulate contraction.
The process of bones increasing in thickness is known as:
A. Appositional growth
Appositional growth is the correct answer. It refers to the process by which bones increase in diameter or thickness. This occurs when osteoblasts in the periosteum lay down new bone matrix on the outer surface, while osteoclasts resorb bone on the inner surface to maintain proper proportions.
B. Concentric growth
Concentric growth is not a recognized term in bone physiology. It may refer to circular layering in osteons but not to bone thickening.
C. Interstitial growth
Interstitial growth occurs within cartilage and is responsible for lengthening during development. It does not contribute to bone thickness.
D. Circumferential growth
Circumferential growth is a vague term and not commonly used in bone biology. It may imply growth around the circumference but is not the standard term for bone thickening.
E. Epiphyseal plate closure
Epiphyseal plate closure marks the end of longitudinal bone growth during adolescence. It does not relate to increasing bone thickness.
Full Explanation
Choice A reason: Appositional growth is the correct answer. It refers to the process by which bones increase in diameter or thickness. This occurs when osteoblasts in the periosteum lay down new bone matrix on the outer surface, while osteoclasts resorb bone on the inner surface to maintain proper proportions.
Choice B reason: Concentric growth is not a recognized term in bone physiology. It may refer to circular layering in osteons but not to bone thickening.
Choice C reason: Interstitial growth occurs within cartilage and is responsible for lengthening during development. It does not contribute to bone thickness.
Choice D reason: Circumferential growth is a vague term and not commonly used in bone biology. It may imply growth around the circumference but is not the standard term for bone thickening.
Choice E reason: Epiphyseal plate closure marks the end of longitudinal bone growth during adolescence. It does not relate to increasing bone thickness.
The gliding motion of the carpal bones uses _____ joints.
A. Hinge
Hinge joints allow movement in one plane, such as flexion and extension, seen in the elbow and knee. They do not permit gliding motions.
B. Plane
Plane joints are the correct answer. They allow bones to slide past each other in any direction along the plane of the joint. The carpal bones in the wrist articulate via plane joints, enabling gliding movements.
C. Ball-and-socket
Ball-and-socket joints allow multi-directional movement and rotation, such as in the shoulder and hip. They are not involved in the gliding motion of carpal bones.
D. Condyloid
Condyloid joints permit movement in two planes, such as flexion/extension and abduction/adduction. They are found in the wrist but not between carpal bones.
E. Pivot
Pivot joints allow rotational movement around a single axis, such as the joint between the atlas and axis vertebrae. They do not facilitate gliding.
Full Explanation
Choice A reason: Hinge joints allow movement in one plane, such as flexion and extension, seen in the elbow and knee. They do not permit gliding motions.
Choice B reason: Plane joints are the correct answer. They allow bones to slide past each other in any direction along the plane of the joint. The carpal bones in the wrist articulate via plane joints, enabling gliding movements.
Choice C reason: Ball-and-socket joints allow multi-directional movement and rotation, such as in the shoulder and hip. They are not involved in the gliding motion of carpal bones.
Choice D reason: Condyloid joints permit movement in two planes, such as flexion/extension and abduction/adduction. They are found in the wrist but not between carpal bones.
Choice E reason: Pivot joints allow rotational movement around a single axis, such as the joint between the atlas and axis vertebrae. They do not facilitate gliding.