Which anatomical structure houses the malleus, incus and stapes?
Skull
Lungs
Ear
Mouth
The Correct Answer is C
The malleus, incus, and stapes are three small bones, collectively known as the ossicles, located in the middle ear. These bones work together to transmit sound waves from the eardrum to the inner ear, where they are converted into nerve impulses that are then sent to the brain. The malleus is atached to the eardrum, the incus is in between the malleus and the stapes, and the stapes is connected to the inner ear. Together, they form a chain that amplifies the sound waves and transmits them efficiently to the inner ear.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Lysosomes contribute to phagocytosis in white blood cells by fusing with the phagosome, which is the membrane-bound vesicle that engulfs the foreign particle or pathogen during phagocytosis. The lysosomes contain hydrolytic enzymes that can break down the engulfed material, thereby helping to destroy the invading pathogen. Additionally, lysosomes can also release reactive oxygen species and other antimicrobial molecules that further aid in the destruction of the pathogen.
Vacuoles, endoplasmic reticulum, and Golgi apparatus do not directly contribute to phagocytosis in white blood cells. Vacuoles are used for storage in cells, while the endoplasmic reticulum and Golgi apparatus are involved in protein synthesis and processing.
Correct Answer is D
Explanation
The quadriceps femoris group is a group of four muscles located in the anterior compartment of the thigh. These muscles are responsible for extending the leg at the knee joint. The four muscles that make up the quadriceps femoris group are the rectus femoris, vastus medialis, vastus intermedius, and vastus lateralis.
The vastus lateralis is the largest of the four muscles and is located on the lateral side of the thigh. It originates from the greater trochanter of the femur, the lateral lip of the linea aspera, and the lateral intermuscular septum. It inserts into the patella and the tibial tuberosity via the patellar tendon. The vastus lateralis is responsible for extending the leg at the knee joint and is also involved in stabilizing the patella.
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