Register
Question 1
What effect does thyroid hormone have on metabolism?
Correct Answer:
Accelerates metabolic processes
Explanation:
Thyroid hormone plays a pivotal role in regulating metabolism. It primarily acts to accelerate metabolic processes, which is crucial for various physiological functions. This acceleration occurs because thyroid hormones, mainly thyroxine (T4) and triiodothyronine (T3), enhance the basal metabolic rate by increasing the rate of oxygen consumption and heat production in tissues. They promote the metabolism of carbohydrates, fats, and proteins, thus elevating the overall energy expenditure of the body. Thyroid hormones stimulate metabolic pathways such as glycolysis, gluconeogenesis, lipolysis, and protein synthesis. This stimulation leads to increased levels of key enzymes involved in these pathways, highlighting their significant impact on both the synthesis and breakdown of various substrates in the body. Because of this direct effect on metabolic processes, the notion that thyroid hormone inhibits, has no effect at all, or merely registers slight decreases in metabolic activity does not hold true. Rather, the correct understanding is that thyroid hormones are essential for proper metabolic functioning and energy homeostasis, making the acceleration of metabolic processes their primary effect.
Question 2
What is the single most likely diagnosis for a 30-year-old man with episodic headaches, palpitations, anxiety, and high blood pressure?
Correct Answer:
Phaeochromocytoma
Explanation:
The symptoms presented in the case—a 30-year-old man experiencing episodic headaches, palpitations, anxiety, and high blood pressure—are highly indicative of pheochromocytoma. This tumor arises from the adrenal medulla and primarily secretes catecholamines, which include epinephrine and norepinephrine. These hormones can lead to episodic symptoms such as headache, palpitations (due to increased heart rate), anxiety, and significant increases in blood pressure. Pheochromocytoma is known for causing paroxysmal episodes of these symptoms, which aligns well with the description of "episodic" headaches and the associated cardiovascular symptoms. The anxiety noted may stem from the catecholamine surge as well. While hyperthyroidism can also cause palpitations and anxiety, it tends to present with additional systemic symptoms such as weight loss, heat intolerance, and a hyperdynamic circulation, which are not mentioned here. Panic attacks could explain the anxiety and palpitations, but they would not typically present with consistently high blood pressure or headaches. Cushing's disease leads to a distinct set of symptoms characterized by weight gain, changes in skin, and a characteristic appearance, which do not align as closely with the episodic and acute
Question 3
What is the most likely diagnosis for a 23-year-old woman with secondary amenorrhea, dark neck pigmentation, severe acne, and low potassium?
Correct Answer:
Cushing's syndrome
Explanation:
The symptoms presented in this case—the combination of secondary amenorrhea, dark neck pigmentation, severe acne, and low potassium—strongly suggest Cushing's syndrome as the most likely diagnosis. Cushing's syndrome is characterized by excess cortisol, which can be caused by various factors, such as a pituitary adenoma (Cushing's disease), adrenal tumors, or ectopic ACTH production. One of the hallmark features of Cushing's syndrome is the distinctive physical changes it causes, including the development of hirsutism and severe acne due to androgen excess, which aligns with this patient’s presentation. The dark neck pigmentation can indicate a condition known as hyperpigmentation, which is sometimes seen in Cushing’s syndrome due to cortisol's interaction with the skin. The presence of low potassium is particularly telling, as hypokalemia can arise from the mineralocorticoid effects of excess cortisol, which leads to increased sodium retention and potassium secretion. Given these clinical signs, the diagnosis of Cushing's syndrome fits best with the combination of secondary amenorrhea, severe acne, and low potassium levels, distinguishing it effectively from the other conditions listed. For instance, acquired hypothyroidism typically presents with symptoms like fatigue, weight gain, and cold
Question 4
What is a classic symptom of Graves' disease?
Correct Answer:
Exophthalmos (protruding eyes)
Explanation:
Graves' disease is an autoimmune disorder that leads to overactivity of the thyroid gland, resulting in hyperthyroidism. A classic symptom associated with Graves' disease is exophthalmos, which refers to the protrusion of the eyes. This condition occurs due to the accumulation of glycosaminoglycans in the retro-orbital space, causing swelling and pushing the eyes forward. This symptom is quite distinctive and helps differentiate Graves' disease from other forms of hyperthyroidism and thyroid dysfunction. While other symptoms of hyperthyroidism can include weight loss, increased appetite, heat intolerance, and nervousness, exophthalmos is particularly characteristic of Graves' due to the underlying autoimmune process affecting the eyes and surrounding tissues. In contrast, the other options do not align with the typical presentation of Graves' disease. Weight gain and fatigue are not typical of hyperthyroidism, which generally leads to weight loss and increased energy levels. Hypoglycemia is not a direct symptom of Graves' disease; rather, it is often related to insulin or metabolic issues. Joint pain may occur in various conditions but is not a hallmark symptom of Graves' disease.
Question 5
A 9 year old boy presents with glycosuria after an appendectomy but has no history of diabetes. What is the most appropriate follow-up investigation?
Correct Answer:
Fasting blood glucose
Explanation:
The most appropriate follow-up investigation in this scenario is fasting blood glucose. This test is crucial in evaluating the possibility of diabetes mellitus, particularly since the child has presented with glycosuria, which means that glucose is present in the urine. In the absence of a known history of diabetes, assessing fasting blood glucose levels can provide essential information regarding the child's glucose metabolism and whether there is a need for further investigation or intervention. When fasting blood glucose levels are measured, they provide a snapshot of how well the body is managing glucose without the influence of recent food intake. In children, like adults, a fasting blood glucose level of 126 mg/dL or higher is indicative of diabetes. Additionally, if an abnormal result is found, it may warrant further testing, such as an oral glucose tolerance test, to confirm a diagnosis. Other investigations such as glycated hemoglobin (HbA1c) are useful for assessing long-term glucose control and may not be as reliable in the acute context following the child's appendectomy. Similarly, while random blood glucose could be informative, fasting levels are preferred when assessing for diabetes, especially since the presence of glycosuria suggests that further evaluation of blood glucose is necessary. The 24-hour urine cortisol test pertains more to adrenal function
Question 1
Exam overview

About this Exam

The Professional and Linguistic Assessments Board (PLAB) test provides the primary route for international medical graduates (IMGs) to demonstrate that they possess the necessary skills and knowledge to practice medicine in the United Kingdom. This specific [PLAB Endocrinology Practice Exam] is a comprehensive assessment tool designed to help aspiring UK doctors master the endocrine system component of the PLAB 1 exam. It is tailored for medical graduates who need to refine their clinical knowledge in hormonal disorders to ensure they meet the rigorous standards set by the General Medical Council (GMC).

More details

Additional Information

What the Course Entails and Exam Details

This practice exam is not a taught course, but rather a rigorous assessment resource that covers the essential breadth and depth of endocrinology required for UK practice. It delves into critical clinical scenarios and theoretical knowledge across a wide range of topics, including diabetes mellitus management, thyroid dysfunction, adrenal gland disorders, pituitary tumors, and metabolic bone disease. The details of the practice assessment are designed to mimic the complexity and style of the questions you will encounter in the actual PLAB 1, focusing on clinical decision-making and data interpretation relevant to foundational medical practice in the NHS.


What to Expect in the Final Exam

While this resource serves as vital preparation, candidates must understand the structure of the official PLAB 1 exam. The final PLAB 1 exam is a three-hour, computer-based test comprising 180 multiple-choice questions. These are Single Best Answer (SBA) questions, requiring you to select the most appropriate option from five possibilities based on a clinical vignette. The exam covers the entire spectrum of medicine, including a significant portion dedicated to endocrinology. There is no set pass mark, as the passing standard is determined for each sitting using Angoff standard-setting methods, ensuring fairness relative to the difficulty of the specific paper.


How to Study and Exam Centers

Effective preparation for the [PLAB Endocrinology Practice Exam] and the subsequent official test involves a strategic approach. We highly recommend integrating this practice exam with comprehensive review materials, such as the Oxford Handbook of Clinical Medicine and current NICE guidelines, which represent the standard of care in the UK. Regularly taking timed practice tests is crucial for building speed and accuracy in answering SBA questions. It is also beneficial to form study groups to discuss complex clinical cases.

The official PLAB 1 exam is administered by the GMC and is held at various times throughout the year in test centers across the UK and in numerous international locations, often arranged through the British Council. Candidates must book their places through their GMC Online account once they meet the eligibility criteria, including necessary English language proficiency.


Job Opportunities from the Course

Successfully passing the PLAB exams (both PLAB 1 and PLAB 2) is a critical milestone that grants GMC registration, allowing international doctors to legally practice medicine in the UK. This certification unlocks a wide array of job opportunities within the National Health Service (NHS), including:

  • Foundation Doctor (FY1 and FY2 positions)

  • Core Medical Training (CMT) / Internal Medicine Training (IMT) posts

  • Specialty Registrar (StR) training pathways in numerous medical specialties, including Endocrinology and Diabetes

  • Trust Grade Doctor positions across various hospital departments

  • General Practice (GP) specialty training (upon completion of necessary foundation competencies)

Quiz information

Frequently Asked Questions

The complete question count is available after full access is unlocked.
No fixed duration is currently configured for this quiz.
Question explanations are included where they are available in the quiz content, helping you review the reasoning after answering.
Yes. You can retake the practice test again as you continue studying during your available access period.
After your access is confirmed, you can continue into the complete practice exam from this quiz flow.
Unless explicitly stated otherwise, this page provides independent practice material for study and exam preparation and is not the official examination itself.
Keep studying

Related Questions

PLAB Pediatrics Practice Exam

0 min

Professional and Linguistic Assessments Board (PLAB) Practice Exam

0 min

ABIM Endocrinology Practice Questions - ABIM Endocrinology, Diabetes, and Metabolism Certification Exam

0 min

ABOG Reproductive Endocrinology and Infertility Practice Questions - ABOG Reproductive Endocrinology and Infertility Subspecialty Certifying Examination Exam

0 min

ABP Pediatric Endocrinology Practice Questions - ABP Pediatric Endocrinology Subspecialty Certification Examination Exam

0 min

Cert Endocrinology(SA) Paed Practice Questions - CMSA Sub-specialty Certificate in Endocrinology and Metabolism Paediatric Exam

0 min