SI Session 6: Joints & Movement (Lectures 9 & 10)

The menisci of the knee joint are made from what type of cartilage?

• fibrocartilage

• hyaline cartilage

• dense regular connective tissue

• elastic cartilage

Answer explanation

The menisci of the knee joint are made of fibrocartilage, which provides support and cushioning. Unlike hyaline cartilage, fibrocartilage is tougher and can withstand pressure, making it ideal for the knee's load-bearing function.

What are the two main components of the appendicular skeleton?

• upper limbs (including pectoral girdle)

• lower limbs (including pelvic girdle)

• Vertebral column

• Ribcage

Answer explanation

The appendicular skeleton consists of the upper limbs (including the pectoral girdle) and the lower limbs (including the pelvic girdle). The vertebral column and ribcage are part of the axial skeleton, not the appendicular.

The pelvic girdle is composed of two hip bones (ossa coxae) each formed by the fusion of what three bones?

• Sacrum, ilium, ischium

• ischium, ilium, pubis

• pubis, ilium, coccyx

• coccyx, sacrum, pubis

Answer explanation

The pelvic girdle consists of two hip bones, each formed by the fusion of the ischium, ilium, and pubis. Therefore, the correct answer is ischium, ilium, pubis.

Name the bone shown in green.

• Femur

• Tibia

• Patella 

• Fibula

Answer explanation

The bone shown in green is the fibula, which is located on the lateral side of the leg, parallel to the tibia. It is thinner than the tibia and plays a role in stabilizing the ankle.

• clavicle
• rib cage
• humerus
• femur

What feature is labeled 6?

• obturator foramen

• acetabulum

• greater sciatic notch

• pubis symphysis

Answer explanation

The acetabulum is the socket of the hip joint where the femur fits. It is a key feature of the pelvis, distinguishing it from the other options like the obturator foramen and greater sciatic notch.

Tags

NGSS.MS-LS4-2

This bone is located on the thumb side of the forearm

• ulna

• radius

• humerus

• patella

Answer explanation

The radius is the bone located on the thumb side of the forearm, while the ulna is on the opposite side. The humerus is the upper arm bone, and the patella is the kneecap. Therefore, the correct answer is radius.

Name the outside portion of the tibia shown in blue.

• Medial malleolus

• Lateral malleolus

• Acetabulum

• Talus

Answer explanation

The medial malleolus is the bony prominence on the inner side of the ankle, formed by the tibia. The lateral malleolus is on the outer side, while the acetabulum and talus are parts of the hip and ankle joints, respectively.

The clavicle attaches to the ___ laterally.

• tibia

• scapula

• sternum

• carpal

Answer explanation

The clavicle, or collarbone, attaches laterally to the scapula, forming the acromioclavicular joint. This connection is crucial for shoulder movement and stability.

The head of the radius articulates with the

• Carpals

• Capitulum

• Trochlea

• Styloid process

Answer explanation

The head of the radius articulates with the capitulum of the humerus, allowing for the rotation of the forearm. The other options, such as carpals and trochlea, do not directly connect with the radius head.