What occurs when the sympathetic nervous system is stimulated?

The urethra is the tube that transports both semen and urine out of the body through the penis. It is part of both the male reproductive system and the urinary system.

Choice A is wrong because the epididymis is a coiled tube that stores and transports sperm from the testes to the vas deferens.

It is only part of the male reproductive system.

Choice C is wrong because the testes are the male gonads that produce sperm and testosterone.

They are also only part of the male reproductive system.

Choice D is wrong because the ureter is a tube that carries urine from the kidney to the bladder.

It is only part of the urinary system.

The correct answer is choice C. Hinge.

The elbow joint is a synovial joint that allows for flexion and extension of the forearm. It is classified as a hinge joint because it permits movement in only one plane (uniaxial).

Choice A. Saddle is wrong because a saddle joint allows for movement in two planes (biaxial), such as the joint between the trapezium carpal bone and the first metacarpal bone at the base of the thumb.

Choice B. Pivot is wrong because a pivot joint allows for rotational movement around a single axis, such as the joint between the atlas and axis vertebrae.

Choice D. Ball and socket is wrong because a ball and socket joint allows for movement in three planes (multiaxial), such as the joint between the humerus and scapula at the shoulder.

It is part of the rib cage and serves as an attachment site for some abdominal muscles.

Choice A is wrong because the hyoid bone is a U-shaped bone located in the neck, above the larynx. It does not articulate with any other bone and supports the tongue and laryngeal muscles.

Choice B is wrong because the ossa coxae are the hip bones that form the pelvic girdle. They are composed of three fused bones: ilium, ischium and pubis.

Choice C is wrong because sesamoid bones are small, round bones that are embedded in tendons.

They protect the tendons from wear and tear and increase their leverage. The most common sesamoid bone is the patella (kneecap).

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.