L1 (T1): Introduction to the Endocrine system
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L1 (T1): Introduction to the Endocrine system

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Questions and Answers

What is the function of the anterior lobe of the pituitary gland?

Production of growth hormone

Which gland is considered the master regulator of metabolism?

Thyroid gland

What is the connection between the pituitary gland and the hypothalamus called?

Hypothalamic-pituitary axis

What is the condition characterized by excessive levels of growth hormone?

<p>Acromegaly</p> Signup and view all the answers

Which of the following is a potential risk associated with the misuse of anabolic androgenic steroids in men?

<p>Increased risk of infection</p> Signup and view all the answers

Which of the following is a potential risk associated with the misuse of anabolic androgenic steroids in women?

<p>Hair loss</p> Signup and view all the answers

Which gland is responsible for the secretion of growth hormone?

<p>Pituitary gland</p> Signup and view all the answers

Which type of hormone can freely dissolve in the blood?

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

Why is it important to have a physiological hormonal response to fear?

<p>It enhances survival during injuries and infections</p> Signup and view all the answers

What is the unique feature of the pancreas compared to other glands?

<p>It has an exocrine and an endocrine role</p> Signup and view all the answers

What is the role of the islets of Langerhans in the pancreas?

<p>They secrete hormones</p> Signup and view all the answers

Which gland only has an endocrine role?

<p>Thyroid gland</p> Signup and view all the answers

Which hormone is responsible for the master regulation of metabolism?

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

What is the main difference between acromegaly and gigantism?

<p>Acromegaly causes bones to keep growing, while gigantism causes bones to fuse</p> Signup and view all the answers

What is the role of iodine in thyroid hormone production?

<p>Iodine is used by the thyroid gland to produce thyroid hormones</p> Signup and view all the answers

What are the symptoms of hyperthyroidism?

<p>Weight loss, difficulty sleeping, and increased metabolism</p> Signup and view all the answers

What is the primary role of the pancreas in relation to diabetes?

<p>Absorption and utilization of nutrients from food</p> Signup and view all the answers

What happens when the body is unable to produce enough insulin in diabetes?

<p>All of the above</p> Signup and view all the answers

What is the meaning of the term 'diabetes mellitus'?

<p>To pass through urine and it's sweet</p> Signup and view all the answers

What are the primary sex hormones produced by the reproductive organs?

<p>Progesterone, estrogen, and testosterone</p> Signup and view all the answers

Which of the following statements about peptide hormones is true?

<p>Peptide hormones need to be injected</p> Signup and view all the answers

Why can't peptide hormones be taken orally?

<p>Peptide hormones get broken down by enzymes</p> Signup and view all the answers

Which type of hormone tends to have a rapid and quick effect?

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

Which of the following best describes the solubility of steroid hormones?

<p>Steroid hormones are not water soluble</p> Signup and view all the answers

What do steroid hormones need to be bound to in order to be transported in the blood?

<p>Plasma proteins</p> Signup and view all the answers

Which type of hormone tends to have a long duration of action?

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

Which gland is often referred to as the 'master gland'?

<p>Pituitary</p> Signup and view all the answers

Which hormone is responsible for growth and development?

<p>Growth hormone</p> Signup and view all the answers

Which type of hormone is transported in the blood to its target?

<p>Endocrine</p> Signup and view all the answers

Which type of hormone has a rapid onset of action and a short duration of action?

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

Which route of administration is suitable for insulin?

<p>Injection</p> Signup and view all the answers

Which hormonal mechanism of action involves receptor autophosphorylation?

<p>Receptor Tyrosine Kinases</p> Signup and view all the answers

Which hormones are produced by the hypothalamus to induce the release of another hormone?

<p>Releasing Hormones</p> Signup and view all the answers

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

<p>Adrenaline</p> Signup and view all the answers

Which of the following hormones is produced by the anterior lobe of the pituitary gland?

<p>Growth hormone</p> Signup and view all the answers

What is the primary role of the thyroid gland?

<p>Regulation of calcium levels</p> Signup and view all the answers

What is the main function of the islets of Langerhans in the pancreas?

<p>Regulation of blood glucose levels</p> Signup and view all the answers

Which of the following is a symptom of hyperthyroidism?

<p>Protruding eyes</p> Signup and view all the answers

What is the primary function of the gonads?

<p>Gametogenesis</p> Signup and view all the answers

Which of the following hormones is important for the regulation of the menstrual cycle?

<p>Progesterone</p> Signup and view all the answers

Which gland is considered the 'master regulator' of metabolism?

<p>The pituitary gland</p> Signup and view all the answers

What is the primary role of the pancreas in relation to diabetes?

<p>To produce insulin</p> Signup and view all the answers

What is the connection between the pituitary gland and the hypothalamus called?

<p>The hypothalamic-pituitary portal system</p> Signup and view all the answers

Why can't peptide hormones be taken orally?

<p>They are rapidly metabolized in the liver</p> Signup and view all the answers

What is the main difference between acromegaly and gigantism?

<p>The age of onset</p> Signup and view all the answers

Which of the following best describes the feedback loops in the endocrine system?

<p>Negative feedback loops maintain homeostasis and are more common biologically</p> Signup and view all the answers

What is the likely primary endocrine dysfunction when there are very high levels of T3 and T4, but low levels of TRH and TSH?

<p>Likely primary endocrine dysfunction with possible adenoma secreting T3, T4, and TSH</p> Signup and view all the answers

In which order do the three groups of hormones (releasing, stimulating, and non-trophic) signal?

<p>Release -&gt; Stimulating -&gt; Non-trophic</p> Signup and view all the answers

What is the term for the movement of hormones via the circulatory system to a target receptor in another part of the body?

<p>Endocrine</p> Signup and view all the answers

What is the disruption caused by malfunction at the pituitary level related to secreting or releasing hormones called?

<p>Secondary endocrine disorder</p> Signup and view all the answers

What is the function of the exocrine glands?

<p>Secretion of digestive enzymes into the gastrointestinal tract</p> Signup and view all the answers

What is the term for the action of hormones onto neighbouring endocrine cells?

<p>Paracrine</p> Signup and view all the answers

What is the term for the action of hormones onto the cell of origin?

<p>Autocrine</p> Signup and view all the answers

What is the term for the maintenance of physiological equilibrium?

<p>Homeostasis</p> Signup and view all the answers

Study Notes

Endocrine System Overview

  • The pituitary gland is considered the 'master gland' or 'master regulator' of metabolism.
  • The connection between the pituitary gland and the hypothalamus is called the hypophyseal portal system.

Pituitary Gland Functions

  • The anterior lobe of the pituitary gland secretes growth hormone.
  • Growth hormone is responsible for growth and development.

Hormone Characteristics

  • Peptide hormones cannot be taken orally because they are broken down in the digestive system.
  • Peptide hormones have a rapid onset of action and a short duration of action.
  • Steroid hormones need to be bound to a carrier protein to be transported in the blood.
  • Steroid hormones have a long duration of action.

Pancreas and Diabetes

  • The primary role of the pancreas is to regulate blood sugar levels in relation to diabetes.
  • The islets of Langerhans in the pancreas produce hormones to regulate blood sugar levels.
  • When the body is unable to produce enough insulin, it leads to diabetes.
  • The term 'diabetes mellitus' refers to a group of metabolic disorders characterized by high blood sugar levels.
  • The primary sex hormones produced by the reproductive organs are estrogen and testosterone.

Hormone Regulation

  • The hypothalamus produces releasing hormones to induce the release of another hormone.
  • The negative feedback loop is an example of a feedback loop in the endocrine system.
  • Hormones can act on neighbouring endocrine cells (paracrine action) or on the cell of origin (autocrine action).
  • Homeostasis is the maintenance of physiological equilibrium.

Thyroid Gland

  • The primary role of the thyroid gland is to regulate metabolism.
  • Iodine is essential for thyroid hormone production.
  • Hyperthyroidism is characterized by symptoms such as weight loss, anxiety, and rapid heartbeat.
  • The main difference between acromegaly and gigantism is the timing of excessive growth hormone production.

Other

  • The adrenal medulla produces epinephrine and norepinephrine.
  • Insulin is typically administered through injection or infusion.
  • The gonads produce sex hormones that regulate the menstrual cycle.

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Test your knowledge on anabolic androgenic steroids and their misuse in sports. Explore the case of Lance Armstrong and his alleged use of performance-enhancing substances. Challenge yourself with questions about the impact of steroids in competitive sports.

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