Which muscle of the quadriceps femoris group lies on the side surface of the lower extremity?

 

The correct answer is choice C. Melanoma. Melanoma is a type of skin cancer that can be recognized by the lesion’s character based on the ABCD rule.

The ABCD rule stands for Asymmetry, Border irregularity, Color and Dermoscopic structure. Melanomas tend to have asymmetrical shapes, irregular borders, multiple colors and different structures.

Choice A is wrong because sarcoma is a cancer of the connective tissues, not the skin. Choice B is wrong because basal cell carcinoma is a type of skin cancer that usually has a pearly or waxy appearance, not the features of the ABCD rule. Choice D is wrong because squamous cell carcinoma is a type of skin cancer that usually has a scaly or crusty appearance, not the features of the ABCD rule.

Normal ranges for skin lesions vary depending on the type and location of the lesion, but generally they should be symmetrical, have smooth borders, be uniform in color and have a consistent structure. Any changes in size, shape, color or texture of a skin lesion should be checked by a doctor.

This is a process in which compact and spongy bone develops directly from sheets of mesenchymal (undifferentiated) connective tissue.

Choice A is wrong because vertebrae are formed by endochondral ossification, which is a process in which bone develops from a pre-existing cartilage model.

Choice B is wrong because long bones of arms and legs are also formed by endochondral ossification.

Choice C is wrong because bones of the pelvic girdle are also formed by endochondral ossification.

Choice A is wrong because callus formation and callus ossification occur after hematoma formation, not before.

Choice B is wrong because bone remodeling is the last stage of bone repair, not the first.

Choice C is wrong because hematoma formation is the first stage of bone repair, not the third.

Hematoma formation is when blood clots form at the site of the fracture.

Callus formation is when a soft mass of tissue forms between the broken ends of the bone.

Callus ossification is when the callus is replaced by woven bone and cartilage.

Bone remodeling is when the excess bone tissue is removed and compact bone is formed

The shoulder joint is a ball and socket joint, which is a type of synovial joint that allows movement in almost every direction.

A ball and socket joint is made up of a round end of one bone that fits into a small cup-like area of another bone.

Choice A. Elbow is wrong because the elbow joint is a hinge joint, which is a type of synovial joint that works like the hinge on a door, allowing bending and straightening only.

Choice B. Knee is wrong because the knee joint is also a hinge joint, which allows bending and straightening only.

Choice D. Ankle is wrong because the ankle joint is a gliding joint, which is a type of synovial joint that allows sliding movements between flat surfaces of bones.