ATI RN
ATI Anatomy and Physiology Questions
Question 1 of 9
Which of the following bones is a component of the appendicular skeleton?
Correct Answer: B
Rationale: The correct answer is B: Symphysis pubis. The symphysis pubis is a component of the appendicular skeleton, specifically part of the pelvic girdle. The xiphoid process (Choice A) is part of the axial skeleton, located at the lower end of the sternum. The sacrum (Choice C) is also part of the axial skeleton, forming the posterior part of the pelvis. The sternum (Choice D) is part of the axial skeleton, located in the center of the chest.
Question 2 of 9
Calcium concentration in the blood is controlled by which of the following glands?
Correct Answer: D
Rationale: The correct answer is Parathyroid glands. The parathyroid glands are responsible for regulating calcium levels in the blood by secreting parathyroid hormone (PTH). PTH helps increase calcium levels in the blood when they are too low. The other glands listed, such as the Hypothalamus, Thyroid, and Pituitary glands, do not directly control calcium concentration in the blood.
Question 3 of 9
Which of the following bones is a component of the appendicular skeleton?
Correct Answer: B
Rationale: The correct answer is B: Symphysis pubis. The symphysis pubis is a component of the appendicular skeleton, specifically part of the pelvic girdle. The xiphoid process (Choice A) is part of the axial skeleton, located at the lower end of the sternum. The sacrum (Choice C) is also part of the axial skeleton, forming the posterior part of the pelvis. The sternum (Choice D) is part of the axial skeleton, located in the center of the chest.
Question 4 of 9
Which of the following structures, located at the end of the ear canal, vibrates when sound waves strike it?
Correct Answer: D
Rationale: The correct answer is the Tympanic membrane. The tympanic membrane, also known as the eardrum, is located at the end of the ear canal and vibrates when sound waves strike it. This vibration is then transmitted to the ossicles in the middle ear, which amplify and transmit the sound to the inner ear. Choice A, the Acoustic meatus, is incorrect as it is the ear canal itself, not the structure that vibrates. Choice B, the Cochlea, is responsible for translating sound vibrations into electrical signals but is not located at the end of the ear canal. Choice C, the Eustachian tube, is responsible for equalizing pressure between the middle ear and the atmosphere and is not involved in vibration from sound waves.
Question 5 of 9
Peripheral vasodilation results in heat loss through which of the following processes?
Correct Answer: C
Rationale: Peripheral vasodilation is the widening of blood vessels near the surface of the skin, allowing more blood to flow near the skin's surface. This process enhances heat loss primarily through radiation. Radiation is the transfer of heat energy in the form of electromagnetic waves. Conduction involves direct contact between objects, convection involves the transfer of heat through fluid or gas, and evaporation involves the phase change of a liquid to a gas, which cools the surface.
Question 6 of 9
An individual with which of the following blood type can receive only blood of that same type?
Correct Answer: A
Rationale: The correct answer is Type O. Individuals with blood type O can only receive blood from donors with blood type O. This is because type O blood lacks both A and B antigens, so if a person with type O blood receives blood with A, B, or AB antigens, their immune system will recognize these as foreign substances and attack them. Choices B, C, and D are incorrect because individuals with type A can receive blood from A or O donors, individuals with type B can receive blood from B or O donors, and individuals with type AB can receive blood from A, B, AB, or O donors.
Question 7 of 9
Testosterone production is regulated by which of the following glands?
Correct Answer: D
Rationale: Testosterone production is regulated by the pituitary gland. The pituitary gland secretes luteinizing hormone (LH), which stimulates the Leydig cells in the testes to produce testosterone. This hormone is not regulated by the Pineal, Thymus, or Parathyroid glands. The Pineal gland is responsible for secreting melatonin, the Thymus gland is involved in immune function, and the Parathyroid glands regulate calcium levels in the blood.
Question 8 of 9
Which of the following types of cells is primarily responsible for the destruction of old cells and invasive micro-organisms?
Correct Answer: D
Rationale: Macrophages are a type of white blood cell that plays a crucial role in the immune system by engulfing and digesting cellular debris, foreign substances, microbes, cancer cells, and old or damaged cells. Basophils are primarily involved in allergic reactions and parasitic infections, eosinophils combat multicellular parasites and have a role in allergic reactions, and B-cells are responsible for producing antibodies. Therefore, the correct answer is macrophages as they are specialized in phagocytosis and removal of unwanted cells and microorganisms.
Question 9 of 9
Which of the following cardiac valves prevents blood from returning to the left ventricle of the heart?
Correct Answer: D
Rationale: The correct answer is the aortic valve. The aortic valve is located between the left ventricle and the aorta, preventing the backflow of blood into the left ventricle once it has been pumped out during systole. Choice A, pulmonic, is incorrect as it is associated with the right side of the heart. Choice B, mitral, is incorrect as it is the valve between the left atrium and ventricle. Choice C, tricuspid, is incorrect as it is located between the right atrium and ventricle.