Endocrine sytem quiz 1
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Questions and Answers

Which organ produces secretin?

  • Liver
  • Gut (correct)
  • Skin
  • Kidneys

Which organ is responsible for producing insulin-like growth factor one?

  • Liver (correct)
  • Skin
  • Gut
  • Vascular endothelium

Which organ is involved in the production of vitamin D, which is considered a hormone?

  • Vascular endothelium
  • Skin (correct)
  • Adipose tissue
  • Kidneys

Which organ is responsible for producing erythropoietin?

<p>Kidneys (A)</p> Signup and view all the answers

Which organ produces hormones based on catecholamines like adrenaline and noradrenaline?

<p>Adrenal gland (A)</p> Signup and view all the answers

Which organ is responsible for producing melatonin?

<p>Pineal gland (D)</p> Signup and view all the answers

Which type of hormones are derived from fatty acids and include prostaglandins?

<p>Corticosteroids (B)</p> Signup and view all the answers

Which type of hormones include cortisol, estrogen, progesterone, and testosterone?

<p>Steroid hormones (D)</p> Signup and view all the answers

Which organ is responsible for producing hormones like renin that are important in the regulation of blood pressure?

<p>Kidneys (D)</p> Signup and view all the answers

Which organ is responsible for producing hormones that control pancreatic exocrine secretion?

<p>Gut (A)</p> Signup and view all the answers

Which organ is responsible for producing hormones that have important functions in relation to digestion and metabolism?

<p>Gut (D)</p> Signup and view all the answers

Which type of hormone works within seconds or minutes?

<p>Peptide hormones (C)</p> Signup and view all the answers

What is the result of adrenaline binding to the adrenaline receptor?

<p>Activation of a G protein inside the cell (A)</p> Signup and view all the answers

Which hormone acts on receptors inside the cell?

<p>Thyroid hormone (D)</p> Signup and view all the answers

What is the role of G protein coupled receptors?

<p>Activating an enzyme to generate cyclic AMP (D)</p> Signup and view all the answers

What is the structure of the insulin receptor?

<p>Heterodimeric with two alpha chains and two beta chains (A)</p> Signup and view all the answers

What is the effect of cytokines involved in immune function?

<p>They cause a conformational change that triggers phosphorylation of intracellular proteins (B)</p> Signup and view all the answers

Which hormone requires internalization to access its receptor?

<p>Insulin (A)</p> Signup and view all the answers

What is the action of nitric oxide as a hormone?

<p>It can be considered a hormone with fast action (A)</p> Signup and view all the answers

Which type of hormone binds to extracellular ion channels?

<p>Neurotransmitters (C)</p> Signup and view all the answers

What is the result of the activation of G protein coupled receptors?

<p>Conversion of ATP to cyclic AMP (B)</p> Signup and view all the answers

What happens when receptors are broken down within lysosomes?

<p>Cycling of receptors and biological feedback (D)</p> Signup and view all the answers

What is the role of the insulin receptor inside the cell?

<p>Auto phosphorylation (A)</p> Signup and view all the answers

What stimulates the release of insulin from the beta cells of the islets of Langerhans?

<p>High blood glucose (D)</p> Signup and view all the answers

What is the role of insulin in the liver?

<p>Suppresses gluconeogenesis (A)</p> Signup and view all the answers

What is the effect of insulin on muscle tissue?

<p>Promotes uptake of branched-chain amino acids (C)</p> Signup and view all the answers

What happens in the absence of insulin in the liver?

<p>Uncontrolled gluconeogenesis from lactate and amino acids (C)</p> Signup and view all the answers

What alternative fuel do tissues use in the absence of insulin?

<p>Fatty acids (A)</p> Signup and view all the answers

Which hormones are secreted from the intestine upon ingestion of glucose to stimulate insulin secretion?

<p>Gastric inhibitory polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) (B)</p> Signup and view all the answers

What effect does insulin have on the uptake of glucose into adipose tissue?

<p>Provides glycerol 3-phosphate for the synthesis of triglycerides (C)</p> Signup and view all the answers

What is the primary stimulus for insulin secretion?

<p>High blood glucose (A)</p> Signup and view all the answers

What is the effect of insulin on the synthesis of fatty acids?

<p>Accelerates synthesis of fatty acids (B)</p> Signup and view all the answers

What is the consequence of the inability of tissues to use glucose in the absence of insulin?

<p>Blood glucose level will be higher (A)</p> Signup and view all the answers

What is the primary stimulus for insulin secretion?

<p>Ingestion of glucose (C)</p> Signup and view all the answers

What is the consequence of the inability of tissues to use glucose in the absence of insulin?

<p>Tissues use alternative fuels such as fatty acids (B)</p> Signup and view all the answers

What is the role of insulin in the liver?

<p>Accelerates glycolysis (C)</p> Signup and view all the answers

What stimulates the release of insulin from the beta cells of the islets of Langerhans?

<p>High blood glucose (C)</p> Signup and view all the answers

What is the effect of insulin on muscle tissue?

<p>Stimulates protein synthesis (B)</p> Signup and view all the answers

What alternative fuel do tissues use in the absence of insulin?

<p>Fatty acids (B)</p> Signup and view all the answers

What happens in the absence of insulin in the liver?

<p>New gluconeogenesis from lactate and amino acids is uncontrolled (C)</p> Signup and view all the answers

What is the effect of insulin on the uptake of glucose into adipose tissue?

<p>Promotes uptake of glucose (B)</p> Signup and view all the answers

What is the action of nitric oxide as a hormone?

<p>Inhibits insulin secretion (A)</p> Signup and view all the answers

What is the effect of cytokines involved in immune function?

<p>Inhibit insulin secretion (A)</p> Signup and view all the answers

What is the normal range for blood sugar levels?

<p>Between 3.5 and 6 or 7 millimoles per litre (B)</p> Signup and view all the answers

What are the consequences of low blood sugar levels?

<p>Increased heart rate and sweating (B)</p> Signup and view all the answers

What hormone is released when blood sugar is low?

<p>Glucagon (D)</p> Signup and view all the answers

What is the active form of thyroid hormone?

<p>T3 (C)</p> Signup and view all the answers

What is the role of retinoic acid in thyroid hormone function?

<p>It acts as a cofactor for thyroid hormone (B)</p> Signup and view all the answers

What are the effects of thyroid hormone?

<p>Enhanced response to catecholamines (C)</p> Signup and view all the answers

What can too much insulin cause?

<p>Low blood sugar (D)</p> Signup and view all the answers

Which hormones work inside the cells?

<p>Thyroid hormones and retinoic acid (B)</p> Signup and view all the answers

What is the consequence of the brain being starved of glucose?

<p>Confusion and coma (D)</p> Signup and view all the answers

What is the relatively weak hormone produced by the thyroid gland?

<p>Thyroxine (T4) (C)</p> Signup and view all the answers

What hormone has a negative feedback effect on the production of TRH from the hypothalamus and TSH from the pituitary?

<p>Triiodothyronine (T3) (C)</p> Signup and view all the answers

What is the hormone that activates cells in the anterior pituitary to produce thyroid stimulating hormone (TSH)?

<p>Thyrotropin releasing hormone (TRH) (D)</p> Signup and view all the answers

What hormone circulates from the pituitary gland into the bloodstream to stimulate the production and release of thyroxine from the thyroid gland?

<p>Thyroid stimulating hormone (TSH) (B)</p> Signup and view all the answers

What hormone feeds back onto the pituitary gland and the hypothalamus to have a negative feedback effect?

<p>Triiodothyronine (T3) (D)</p> Signup and view all the answers

What is the hormone that inhibits the production of TRH from the hypothalamus and TSH from the pituitary?

<p>Triiodothyronine (T3) (C)</p> Signup and view all the answers

What stimulates cells in the anterior pituitary to produce thyroid stimulating hormone (TSH)?

<p>Thyrotropin releasing hormone (TRH) (A)</p> Signup and view all the answers

What hormone activates cells in the anterior pituitary to produce thyroid stimulating hormone (TSH)?

<p>Thyrotropin releasing hormone (TRH) (D)</p> Signup and view all the answers

What hormone has its effects on the body like increasing the sensitivity to hormones like catecholamines and speeding up metabolic rate?

<p>Triiodothyronine (T3) (A)</p> Signup and view all the answers

What hormone is a relatively weak hormone compared to T3, the active form of thyroid hormone?

<p>Thyroxine (T4) (D)</p> Signup and view all the answers

What is the primary precursor for the production of steroid hormones?

<p>Pregnenolone (B)</p> Signup and view all the answers

What enzyme is necessary for the production of the mineralocorticoid aldosterone?

<p>Aldosterone synthase (A)</p> Signup and view all the answers

At what time of day do cortisol levels tend to be the lowest?

<p>Midnight or early hours of the morning (C)</p> Signup and view all the answers

In the case of thyrotoxicosis, what is the typical level of TSH?

<p>Low (A)</p> Signup and view all the answers

From what molecule is pregnenolone derived?

<p>Cholesterol (C)</p> Signup and view all the answers

Which of the following hormones is produced by the adrenal gland?

<p>Aldosterone (C)</p> Signup and view all the answers

What effect does excess production of thyroxine have on TSH levels?

<p>Decreases TSH levels (C)</p> Signup and view all the answers

What are the symptoms of thyrotoxicosis?

<p>Heat intolerance, tremor, weight loss (D)</p> Signup and view all the answers

What causes the enlargement of the thyroid gland in thyrotoxicosis?

<p>Excess production of thyroxine due to autoimmune activation (C)</p> Signup and view all the answers

What are the consequences of hypothyroidism?

<p>Dry skin, feeling cold, slow reflexes (C)</p> Signup and view all the answers

What is the relationship between T3, T4, and TSH levels in hypothyroidism?

<p>T3 and T4 are low, TSH is high (B)</p> Signup and view all the answers

How does thyrotoxicosis affect the eyes?

<p>Damages the muscles behind the eye and causes inflammation (B)</p> Signup and view all the answers

What is the impact of hypothyroidism on metabolism?

<p>Metabolism slows down (A)</p> Signup and view all the answers

What is the cause of fast heart rate and palpitations in thyrotoxicosis?

<p>Autoimmune activation of the thyroid leading to excess thyroxine production (B)</p> Signup and view all the answers

What hormone is responsible for the development of the endometrium, allowing implantation of a fertilized egg?

<p>Progesterone (C)</p> Signup and view all the answers

Which hormone is secreted by ghrelinergic cells in the stomach in response to an empty stomach?

<p>Ghrelin (D)</p> Signup and view all the answers

What is the main function of glucagon-like peptide one (GLP-1)?

<p>Stimulate insulin production (C)</p> Signup and view all the answers

Which hormone triggers ovulation by surging after a positive feedback loop?

<p>Luteinizing hormone (B)</p> Signup and view all the answers

Which hormone is controlled largely by the pituitary gland and is involved in the menstrual cycle?

<p>Luteinizing hormone (B)</p> Signup and view all the answers

Which hormone is responsible for increasing appetite, decreasing thermogenesis, and increasing insulin production?

<p>Ghrelin (B)</p> Signup and view all the answers

Which hormone is released into the bloodstream when you eat and stimulates the production of insulin?

<p>GLP-1 (C)</p> Signup and view all the answers

What hormone drives our circadian rhythms by being produced in the pineal gland?

<p>Melatonin (A)</p> Signup and view all the answers

Which hormone is involved in the development of a follicle and eventually results in a positive feedback loop, leading to ovulation?

<p>Estrogen (C)</p> Signup and view all the answers

What hormone is secreted by the corpus luteum after ovulation and is responsible for the development of the endometrium?

<p>Progesterone (D)</p> Signup and view all the answers

What is the primary cause of Cushing's syndrome?

<p>Excessive production of ACTH from the pituitary gland (B)</p> Signup and view all the answers

What are the typical symptoms of Addison’s Disease?

<p>Fatigue, dizziness, and back pain (C)</p> Signup and view all the answers

How is Addison's Disease treated?

<p>With corticosteroid replacement (C)</p> Signup and view all the answers

What causes excessive pigmentation of the skin in Addison's Disease?

<p>Excessive production of alpha MSH (A)</p> Signup and view all the answers

What hormone controls the ACTH adrenal corticotropin hormone cells in the anterior pituitary?

<p>Thyroxine (C)</p> Signup and view all the answers

What is the consequence of excessive production of ACTH in Cushing's syndrome?

<p>Weakness, thinning of the skin, and bone fractures (B)</p> Signup and view all the answers

What is the role of aldosterone in Addison's Disease?

<p>It regulates blood pressure (B)</p> Signup and view all the answers

What is the primary effect of excessive cortisol production in Cushing's syndrome?

<p>Obesity and diabetes (D)</p> Signup and view all the answers

What is the cause of excessive production of alpha MSH in Addison's Disease?

<p>Excessive production of ACTH (A)</p> Signup and view all the answers

What is the primary site of GLP-1 production in the body?

<p>Jejunum (A)</p> Signup and view all the answers

What is the function of GLP-1 in glucose regulation?

<p>Increases insulin secretion (B)</p> Signup and view all the answers

What is the role of the hypothalamus in the endocrine system?

<p>Coordinates both the sympathetic and parasympathetic nervous systems (D)</p> Signup and view all the answers

Where is the pituitary gland located?

<p>In its own little case (B)</p> Signup and view all the answers

What hormone does the pituitary gland synthesize?

<p>Prolactin (D)</p> Signup and view all the answers

Which part of the pituitary gland is connected to the hypothalamus?

<p>Pituitary stalk (C)</p> Signup and view all the answers

What is the function of the nuclei in the hypothalamus?

<p>Thermoregulation (B)</p> Signup and view all the answers

What does congenital leptin deficiency lead to?

<p>Increase in food intake (A)</p> Signup and view all the answers

What is the primary role of prolactin?

<p>Producing milk in mammary glands (B)</p> Signup and view all the answers

Which embryonic origins are very different for the anterior and posterior lobes of the pituitary gland?

<p>They have different origins (A)</p> Signup and view all the answers

What is the function of the GLP-1 hormone in the body?

<p>Regulates glucose levels (C)</p> Signup and view all the answers

What is the function of the pituitary stalk (infundibulum)?

<p>Connection between the pituitary gland and the hypothalamus (A)</p> Signup and view all the answers

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