Hormones and Receptors Quiz

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Which of the following is the most potent vasoconstrictor substance?

Noradrenaline

Antidiuretic hormone (correct)

Angiotensin II

Adrenaline

What is the primary function of Angiotensin II (Ang II) in the body?

To increase urine production

To stimulate the release of aldosterone (correct)

To induce thirst responses

To act as a vasodilator

What is the role of the AT2 receptor in the actions of Angiotensin II?

It has no clear role in the actions of Ang II

It mediates the pressor actions of Ang II

It stimulates the release of antidiuretic hormone

It opposes the pressor actions of the AT1 receptor (correct)

What is the primary stimulus for the release of antidiuretic hormone (ADH) from the posterior pituitary gland?

Increased blood osmotic pressure Signup and view all the answers

What is the primary effect of noradrenaline (norepinephrine) released from the adrenal medulla?

Increased heart rate and contractility Signup and view all the answers

What is the primary function of the related Angiotensin peptides (Ang III, Ang IV, Ang 1-7)?

Their functions are not yet clearly defined Signup and view all the answers

Which of the following is the primary physiological function of angiotensin II in the regulation of blood flow?

Activating the sympathetic nervous system to cause vasoconstriction Signup and view all the answers

Which of the following is the primary mechanism by which antidiuretic hormone (ADH) regulates blood flow?

Activating the sympathetic nervous system to cause vasoconstriction Signup and view all the answers

Which of the following is the primary role of the sympathetic nervous system in the regulation of blood flow?

Causing vasoconstriction through the release of norepinephrine and other vasoconstrictors Signup and view all the answers

What is the primary function of aldosterone in the regulation of blood flow?

Stimulating the reabsorption of sodium and water in the kidneys, leading to increased blood volume and pressure Signup and view all the answers

Which of the following is the primary mechanism by which atrial natriuretic peptide (ANP) regulates blood flow?

Inhibiting the reabsorption of sodium and water in the kidneys, leading to decreased blood volume and pressure Signup and view all the answers

Which of the following is the primary role of the renin-angiotensin-aldosterone system (RAAS) in the regulation of blood flow?

Stimulating the reabsorption of sodium and water in the kidneys, leading to increased blood volume and pressure Signup and view all the answers

Which of the following is NOT a physiological action of angiotensin II mediated through AT1 receptors?

Direct vasodilatory effect on vascular smooth muscle Signup and view all the answers

Which enzyme is responsible for converting angiotensin I to the active form, angiotensin II?

Angiotensin-converting enzyme (ACE) Signup and view all the answers

Which hormone is primarily responsible for stimulating aldosterone synthesis in the adrenal cortex?

Angiotensin II Signup and view all the answers

Which of the following statements about vasoconstrictors is NOT true?

Thromboxane A2 is a vasodilator promoted by angiotensin II Signup and view all the answers

Which of the following conditions can trigger the release of renin from the kidneys?

Decreased extracellular fluid (ECF) volume Signup and view all the answers

Which of the following statements about the sympathetic nervous system and angiotensin II is correct?

Angiotensin II potentiates sympathetic nervous system activity through AT1 receptors Signup and view all the answers

Hormones and Receptors Quiz

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Questions and Answers

Which of the following is the most potent vasoconstrictor substance?

What is the primary function of Angiotensin II (Ang II) in the body?

What is the role of the AT2 receptor in the actions of Angiotensin II?

What is the primary stimulus for the release of antidiuretic hormone (ADH) from the posterior pituitary gland?

What is the primary effect of noradrenaline (norepinephrine) released from the adrenal medulla?

What is the primary function of the related Angiotensin peptides (Ang III, Ang IV, Ang 1-7)?

Which of the following is the primary physiological function of angiotensin II in the regulation of blood flow?

Which of the following is the primary mechanism by which antidiuretic hormone (ADH) regulates blood flow?

Which of the following is the primary role of the sympathetic nervous system in the regulation of blood flow?

What is the primary function of aldosterone in the regulation of blood flow?

Which of the following is the primary mechanism by which atrial natriuretic peptide (ANP) regulates blood flow?

Which of the following is the primary role of the renin-angiotensin-aldosterone system (RAAS) in the regulation of blood flow?

Which of the following is NOT a physiological action of angiotensin II mediated through AT1 receptors?

Which enzyme is responsible for converting angiotensin I to the active form, angiotensin II?

Which hormone is primarily responsible for stimulating aldosterone synthesis in the adrenal cortex?

Which of the following statements about vasoconstrictors is NOT true?

Which of the following conditions can trigger the release of renin from the kidneys?

Which of the following statements about the sympathetic nervous system and angiotensin II is correct?

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