MCQ on Leg Bones

The lower leg is made up of two bones: the tibia and the smaller fibula. The femur (large upper leg bone) is the bone that connects the lower leg bones (knee joint) to the pelvic bone (hip joint). The appendicular skeleton, which supports the numerous muscles of the lower limbs, includes the bones of the leg and foot. Standing, walking, sprinting, and jumping are all motions that require these muscles to operate together.

1.Axial Skeleton consists of which of the following bones:
A. Skull
B. Vertebral Column
C. Ribs and Sternum
D. All the above
Ans. D

Explanation: Axial skeletal elements are bones present along the longitudinal axis of the body. There are about  80 bones in the axial skeleton. It consists of a skull, vertebral column, ribs, and sternum.

2. Name the longest and heaviest bone found in our body?
A. Femur
B. Fibula
C. Tibia
D. Ilium
Ans. A

Explanation: The lower leg is composed of two bones: the larger tibia and the smaller fibula. The femur (large upper leg bone) connects the lower leg bones (knee joint) to the pelvic bone (hip joint).

3. Name the only movable bone in the skull of man?
A. Ethmoid bone
B. Mandible bone
C. Nasal bone
D. Lacrimal bone
Ans. B
Explanation: Mandible is the only movable bone in the skull of man.

4. Name the thinnest bone of the human body?
A. Stapes
B. Malleus
C. Incus
D. Fibula
Ans. D
Explanation: The lower leg is composed of two bones: the larger tibia and the smaller fibula. The femur (large upper leg bone) connects the lower leg bones (knee joint) to the pelvic bone (hip joint).

5. Name the muscle that acts in opposition to each other?
A. Cardiac Muscles
B. Skeletal Muscle
C. Antagonists’ muscle
D. Stapedius muscle
Ans. C
A muscle that opposes the action of another is known as an antagonistic muscle. For example, when the triceps relax in response to the flexing biceps’ contraction, the triceps is considered the antagonistic muscle to the biceps, while the biceps is considered the agonist muscle.

6. Name the smallest muscle?
A. Gutters maximus
B. Antagonists
C. Stapedius
D. None of the above
Ans. C
Stapedius is the smallest muscle that is present deep inside the ear. It is just a few millimeters long and thinner than cotton thread.

7. Due to the presence of which pigment skeletal muscles are categorised into red and white muscles?
A. Sarcoplasmic
B. Myoglobin
C. Myosin
D. None of the above
Ans. B
On the basis of the presence or absence of a red pigment called myoglobin. There are two types of skeletal muscles: red and white. 

8. Finger bones are also known as………..?
A. Hamate bone
B. Girdles
C. Phalanges
D. Metacarpal
Ans. C
Finger bones are also known as phalanges. It is of three types: proximal phalanges, intermediate phalanges, and distal phalanges.

9. How many types of Joints are present in our body?
A. 2
B. 3
C. 4
D. 5
Ans. B
Joints are actually a place of articulation between two or more bones or between a bone and a cartilage. Total three joints are present in our body: fixed or immovable joint, slightly movable or cartilaginous joint and freely movable or Synovial joint.

10. The record of electrical activity of muscle is known as ………?
A. Electro-Cardiogram (ECG)
B. Electro-Myogram (EMG)
C. Both A and B
D. Neither A nor B
Ans. B
The record of the heart is known as ECG and the record of electrical activity of muscle is called EMG.

11. The intermediate cutaneous nerve of the thigh

(a) pierces sartorius

(b) projects independent of the medial cutaneous nerve of the thigh

(c) emerges from the sacral plexus

(d) expands beneath the knee

Answer: (a)

Explanation: The intermediate cutaneous nerve is called the middle cutaneous nerve. It pierces the fascia lata about 7.5 cm below the inguinal ligament. And divides it  into two branches which descend in immediate proximity along the forepart of the thigh, to supply the skin as low as the front of the knee.

12. This is not an act of the gracilis

(a) medial rotation of the flexed knee

(b) adduction of the thigh

(c) flexion of the knee

(d) extension of the thigh

Answer: (b)

Explanation: Gracilis is the only adductor of the thigh that crosses and acts on two joints; the hip and knee.

13. The anterior tibial artery is found 

(a) found lateral to the deep peroneal nerve

(b) pierces interosseous membrane

(c) supplies the lateral compartment of the leg

(d) gives nutrient artery to the tibia

Answer: (c)

Explanation: The anterior tibial artery is an artery of the leg. Its function is to carry blood to the anterior compartment of the leg and dorsal surface of the foot, from the popliteal artery.

14. This muscle provides the most control of the hip joint movement while sitting

(a) gluteus maximus

(b) semimembranosus

(c) gluteus medius

(d) iliacus

Answer: (a)

Explanation: The gluteus maximus extends the hip, while the gluteus medius and minimus are involved in hip rotation and abduction (moving hip out from the midline). The adductor group (adductor brevis, longus, and magnus along with petineus and gracilis) moves the femur towards the midline from an abducted position.

15. Concerning the knee joint movements

(a) there is no active rotation of the extended knee

(b) major role of the menisci is in extension/flexion of the knee

(c) popliteus “unlocks” the extended knee by producing medial rotation of the femur

(d) passive knee-extension will not result in “locking” of the joint

Answer: (a)

Explanation: The gluteus maximus extends the hip, whereas the gluteus medius and minimus rotate and abduct the hip (moving hip out from the midline). The adductor group (adductor brevis, longus, and magnus along with petineus and gracilis) moves the femur towards the midline from an abducted position.

16. In the leg

(a) the inferior tibiofibular joint is a synovial joint

(b) the extensor compartment comprises 4 muscles, the anterior tibial vessels and the superficial peroneal nerve

(c) deep fascia covers muscles only

(d) two intermuscular septa attach to the tibia

Answer: (c)

Explanation: Only muscles are covered by the deep fascia of the leg, which is attached to the periosteum at all places where bone is subcutaneous. As a result, there is only subcutaneous tissue of the tibia on the medial side of the leg at the anterior part of the leg. The tibia’s superficial fascia has subcutaneous fat attached to its periosteum.