ATI RN
Chapter 17 Endocrine System Test Questions Questions
Question 1 of 5
Steatorrhoea occurs with all of the following EXCEPT:
Correct Answer: B
Rationale: The correct answer is B: congenital defect in gastric lipase. Steatorrhoea is the presence of excess fat in the stool due to malabsorption. Gastrinoma (A), ileal disease (C), and exocrine pancreatic disease (D) can all lead to malabsorption of fats resulting in steatorrhoea. However, a congenital defect in gastric lipase does not directly affect fat absorption in the intestines, making it the exception in this scenario.
Question 2 of 5
A calorie is:
Correct Answer: D
Rationale: The correct answer is D: the standard unit of heat energy necessary to raise the temperature of 1gm of water 1° from 15-16°C. This is because a calorie is defined as the amount of heat energy required to raise the temperature of 1 gram of water by 1 degree Celsius. This definition aligns perfectly with choice D. Choices A, B, and C are incorrect because they involve raising the temperature of different substances (1L of water, 1gm of mercury, and 1gm of water) by 1 degree Celsius over different temperature ranges (15-16°C, 17-18°C), which do not match the standard definition of a calorie.
Question 3 of 5
Calcium level in the blood is regulated by hormones released from the .
Correct Answer: D
Rationale: The correct answer is D because calcium regulation in the blood is primarily controlled by hormones released from the parathyroid and thyroid glands. Parathyroid hormone (PTH) released by the parathyroid glands increases blood calcium levels, while calcitonin released by the thyroid gland decreases blood calcium levels. The other choices are incorrect because the testes primarily produce hormones related to reproduction (not calcium regulation), the adrenal medulla and pancreas are not directly involved in calcium regulation, and the thymus is involved in immune function but not in calcium regulation.
Question 4 of 5
The hormone that stimulates the contraction of smooth muscle in the uterus is .
Correct Answer: B
Rationale: The correct answer is B: oxytocin. Oxytocin is the hormone responsible for stimulating the contraction of smooth muscle in the uterus during childbirth and labor. It acts on the smooth muscle cells in the uterine wall, causing them to contract and aiding in the process of childbirth. A: Follicle-stimulating hormone is involved in the regulation of the reproductive system, particularly in the development of ovarian follicles. C: Prolactin is primarily responsible for milk production in the mammary glands. D: Luteinizing hormone triggers ovulation and the formation of the corpus luteum in the ovary. Therefore, the correct answer is B because it directly affects the contraction of smooth muscle in the uterus, which is essential during childbirth.
Question 5 of 5
The enzyme amylase breaks down?
Correct Answer: A
Rationale: The correct answer is A: Carbohydrates. Amylase is an enzyme that specifically breaks down carbohydrates, such as starch and glycogen, into simpler sugars like glucose. It does this by catalyzing the hydrolysis of alpha-1,4-glycosidic linkages in polysaccharides. Proteins are broken down by protease enzymes, not amylase. Fats are broken down by lipase enzymes. Choice D is incomplete and does not provide a relevant option.