Nursing practice questions with comprehensive rationales
NurseDive Free Nursing Practice Question
The acetabulum articulates with the:
A. Humerus
The humerus is the upper arm bone and articulates with the glenoid cavity of the scapula, not the acetabulum.
B. Patella
The patella is the kneecap and articulates with the femur, not the acetabulum.
C. Femur
The acetabulum is the deep socket in the pelvic bone that articulates with the head of the femur, forming the hip joint. This ball-and-socket configuration allows for a wide range of motion and stability.
D. Tibia
The tibia is the larger bone of the lower leg and articulates with the femur at the knee joint and the talus at the ankle. It does not connect to the acetabulum.
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Full Explanation
Choice A reason: The humerus is the upper arm bone and articulates with the glenoid cavity of the scapula, not the acetabulum.
Choice B reason: The patella is the kneecap and articulates with the femur, not the acetabulum.
Choice C reason: The acetabulum is the deep socket in the pelvic bone that articulates with the head of the femur, forming the hip joint. This ball-and-socket configuration allows for a wide range of motion and stability.
Choice D reason: The tibia is the larger bone of the lower leg and articulates with the femur at the knee joint and the talus at the ankle. It does not connect to the acetabulum.
Similar Questions
The axial skeleton includes:
A. The skull, the scapula, and the vertebral column
The scapula is part of the appendicular skeleton, not the axial skeleton. Therefore, this combination is incorrect.
B. The skull, vertebral column, and pelvis
The pelvis includes both axial and appendicular components, but the pelvic girdle is considered part of the appendicular skeleton. This makes the answer inaccurate.
C. Pectoral girdle, pelvic girdle, and vertebral column
Both the pectoral and pelvic girdles are part of the appendicular skeleton. Including them in the axial skeleton is incorrect.
D. Arms, legs, hands, and feet
Arms, legs, hands, and feet are all part of the appendicular skeleton. They are not included in the axial skeleton.
E. The skull, vertebral column, and rib cage
This is the correct answer. The axial skeleton consists of the skull, vertebral column, and rib cage. These structures form the central axis of the body and protect vital organs such as the brain, spinal cord, and thoracic organs.
Full Explanation
Choice A reason: The scapula is part of the appendicular skeleton, not the axial skeleton. Therefore, this combination is incorrect.
Choice B reason: The pelvis includes both axial and appendicular components, but the pelvic girdle is considered part of the appendicular skeleton. This makes the answer inaccurate.
Choice C reason: Both the pectoral and pelvic girdles are part of the appendicular skeleton. Including them in the axial skeleton is incorrect.
Choice D reason: Arms, legs, hands, and feet are all part of the appendicular skeleton. They are not included in the axial skeleton.
Choice E reason: This is the correct answer. The axial skeleton consists of the skull, vertebral column, and rib cage. These structures form the central axis of the body and protect vital organs such as the brain, spinal cord, and thoracic organs.
The ______ belongs to the thoracic cage, whereas the ______ belongs to the pectoral girdle.
A. Sternum; clavicle
The sternum is a flat bone located in the center of the chest and forms part of the thoracic cage, which protects vital organs such as the heart and lungs. The clavicle, or collarbone, is part of the pectoral girdle and connects the sternum to the scapula, helping to stabilize the shoulder.
B. Scapula; clavicle
Both the scapula and clavicle are components of the pectoral girdle. This choice does not correctly identify a structure from the thoracic cage.
C. Clavicle; sternum
The clavicle belongs to the pectoral girdle, and the sternum to the thoracic cage. This choice reverses the correct anatomical relationship.
D. Scapula; sternum
The scapula is part of the pectoral girdle, and the sternum is part of the thoracic cage. However, this pairing does not match the structure-to-system relationship asked in the question.
Full Explanation
Choice A reason: The sternum is a flat bone located in the center of the chest and forms part of the thoracic cage, which protects vital organs such as the heart and lungs. The clavicle, or collarbone, is part of the pectoral girdle and connects the sternum to the scapula, helping to stabilize the shoulder.
Choice B reason: Both the scapula and clavicle are components of the pectoral girdle. This choice does not correctly identify a structure from the thoracic cage.
Choice C reason: The clavicle belongs to the pectoral girdle, and the sternum to the thoracic cage. This choice reverses the correct anatomical relationship.
Choice D reason: The scapula is part of the pectoral girdle, and the sternum is part of the thoracic cage. However, this pairing does not match the structure-to-system relationship asked in the question.
The central canal that runs through the core of each osteon contains:
A. Blood vessels and nerve fibers
The central canal, also known as the Haversian canal, is located at the center of each osteon in compact bone. It contains blood vessels and nerve fibers that supply nutrients and signals to the bone cells.
B. Adipose tissue and nerve fibers
Adipose tissue is found in yellow marrow, primarily in the medullary cavity of long bones, not in the central canal of osteons.
C. Yellow marrow and spicules
Yellow marrow and spicules are found in the medullary cavity and spongy bone, respectively. They are not components of the central canal.
D. Cartilage and interstitial lamellae
Cartilage is not present in the central canal. Interstitial lamellae are layers of bone matrix found between osteons, not within the canal.
E. Red marrow and nerves
Red marrow is found in spongy bone and certain flat bones, not in the central canal. While nerves are present, the absence of blood vessels in this choice makes it incomplete.
Full Explanation
Choice A reason: The central canal, also known as the Haversian canal, is located at the center of each osteon in compact bone. It contains blood vessels and nerve fibers that supply nutrients and signals to the bone cells.
Choice B reason: Adipose tissue is found in yellow marrow, primarily in the medullary cavity of long bones, not in the central canal of osteons.
Choice C reason: Yellow marrow and spicules are found in the medullary cavity and spongy bone, respectively. They are not components of the central canal.
Choice D reason: Cartilage is not present in the central canal. Interstitial lamellae are layers of bone matrix found between osteons, not within the canal.
Choice E reason: Red marrow is found in spongy bone and certain flat bones, not in the central canal. While nerves are present, the absence of blood vessels in this choice makes it incomplete.