Which bone is also known as knee cap?

Appeared in: UPRVUNL - 2021

Explanation

The Patella is the anatomical term for the common name 'knee cap'.
It is the largest sesamoid bone in the body, meaning it is a bone embedded within a tendon (the quadriceps femoris tendon).
Its primary functions are to protect the anterior surface of the knee joint and to increase the mechanical advantage (leverage) of the quadriceps muscle for leg extension.

Option A: The Tibia is the shin bone, which is the larger of the two bones located in the lower leg, below the knee joint.
Option B: The Cuboid bone is one of the tarsal bones located on the outer side of the midfoot, not in the knee.
Option D: The Talus is the ankle bone. It forms the crucial link between the bones of the lower leg (tibia and fibula) and the foot.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Anatomy of the lower limb bones as background academic context rather than a clinical decision trigger.
Understanding the patella's location is crucial for assessing knee injuries like fractures or dislocations, which are common in sports and trauma.
The patellar reflex (knee-jerk reflex) is a standard neurological test. Tapping the patellar ligament assesses the integrity of the L2-L4 spinal nerves and the femoral nerve.
What if? If a patient presents with knee pain and an inability to extend the leg against gravity after a fall, a nurse should suspect a patellar fracture or a quadriceps tendon rupture, which requires immediate immobilization and orthopedic consultation.

How to Approach the Question

This is a factual recall question requiring knowledge of basic human anatomy.
First, identify the key term in the question: 'knee cap'.
Recall the scientific or anatomical name for this common term.
Scan the options provided: Tibia, Cuboid, Patella, Talus.
Match the recalled name (Patella) with the corresponding option to find the correct answer.

Concept Tested & Keywords

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E6 Anatomy BDChaurasia V2 10e Part 1 pp. 45-47, 44-46

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