ATI RN
ATI Anatomy and Physiology Questions
Question 1 of 5
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 2 of 5
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 3 of 5
Which of the following hormones is secreted by the posterior pituitary gland?
Correct Answer: D
Rationale: The correct answer is D: Antidiuretic hormone. Antidiuretic hormone (ADH), also known as vasopressin, is produced by the hypothalamus and stored in the posterior pituitary gland. It plays a key role in regulating the body's water balance by controlling the amount of water reabsorbed by the kidneys.
Choices A, B, and C are incorrect because Growth hormone is produced by the anterior pituitary gland, Luteinizing hormone is produced by the anterior pituitary gland, and Adrenocorticotropic hormone is produced by the anterior pituitary gland.
Question 4 of 5
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 5 of 5
Which of the following is the measurement of the percentage of red blood cells in whole blood?
Correct Answer: A
Rationale: The correct answer is 'Hematocrit.' Hematocrit is the measurement of the percentage of red blood cells in whole blood. It is used to diagnose conditions such as anemia and dehydration.
Choice B, 'Hemoglobin,' measures the amount of hemoglobin in the blood, not the percentage of red blood cells.
Choice C, 'Mean corpuscular volume,' measures the average volume of a red blood cell, not the percentage of red blood cells.
Choice D, 'Reticulocyte count,' measures the percentage of young red blood cells in the blood, not the percentage of red blood cells.