In white blood cells, what contributes to phagocytes?

 

This muscle is one of the four muscles that make up the quadriceps femoris group and it lies on the lateral side of the thigh. It originates from the greater trochanter and lateral lip of the linea aspera of the femur and inserts into the patella and tibial tuberosity via the quadriceps tendon. It acts to extend the knee and stabilize the patella.

Choice A. Gastrocnemius is wrong because this muscle is not part of the quadriceps femoris group. It is located in the posterior compartment of the leg and it acts to flex the knee and plantarflex the ankle.

Choice C. Anterior tibialis is wrong because this muscle is not part of the quadriceps femoris group. It is located in the anterior compartment of the leg and it acts to dorsiflex and invert the foot.

Choice D. Rectus femoris is wrong because this muscle does not lie on the side surface of the lower extremity.

It is part of the quadriceps femoris group and it lies on the anterior surface of the thigh. It originates from the anterior inferior iliac spine and acetabular rim of the pelvis and inserts into the patella and tibial tuberosity via the quadriceps tendon. It acts to extend the knee and flex the hip.

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 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.

Digestion begins in the mouth, where the teeth break down the food and the saliva contains enzymes that start to break down carbohydrates. This process is called ingestion.

Choice A is wrong because the esophagus is a thin tube that connects the mouth to the stomach. It does not digest food, but moves it through peristalsis, which are wave-like contractions of the muscles in the gut wall.

Choice C is wrong because the stomach is a muscular bag that mixes food with acid and enzymes. It does not start digestion, but continues it, especially for proteins.

Choice D is wrong because the small intestine is where most of the digestion and absorption of nutrients takes place. It receives enzymes and bile from the pancreas and liver, which help to break down carbohydrates, proteins and lipids.