Chapter 6 Pharm Book
40 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which type of adrenergic drugs activate the adrenergic receptor by directly activating it?

  • Sympathomimetic (correct)
  • Adrenergic Agonists
  • Sympatholytics
  • Norepinephrine blockers

Where are the adrenergic neurons found which release norepinephrine as the primary neurotransmitter?

  • Both in the central nervous system (CNS) and sympathetic nervous system (correct)
  • Central nervous system (CNS) only
  • Parasympathetic nervous system only
  • Sympathetic nervous system only

Which part of the neuron or effector organ are the sites of action of adrenergic drugs?

  • Presynaptic neuron only
  • Postsynaptic neuron and effector organ
  • Presynaptic neuron and effector organ (correct)
  • Postsynaptic neuron only

What is the primary neurotransmitter released by adrenergic neurons?

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

What neurotransmitter is used in neurotransmission at adrenergic neurons?

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

Which type of drugs interrupt the release of norepinephrine from adrenergic neurons?

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

Which type of adrenergic receptor is predominantly found in the heart?

<p>β1 (A)</p> Signup and view all the answers

What is the characteristic response of α1 receptor stimulation?

<p>Vasoconstriction and an increase in total peripheral resistance (A)</p> Signup and view all the answers

Which adrenergic receptor type is responsible for vasodilation in the skeletal vascular beds?

<p>β2 (A)</p> Signup and view all the answers

What is the major effect mediated by α2 adrenoceptors?

<p>Inhibition of norepinephrine release (B)</p> Signup and view all the answers

Which structural feature differentiates catecholamines from noncatecholamines?

<p>Presence of polar hydroxyl groups (B)</p> Signup and view all the answers

What is the main reason for the poor penetration of catecholamines into the central nervous system (CNS)?

<p>Polar nature preventing easy penetration (C)</p> Signup and view all the answers

Which of the following is true about epinephrine?

<p>It causes vasoconstriction by acting on bronchial smooth muscle. (C)</p> Signup and view all the answers

What is the major action of epinephrine on the cardiovascular system?

<p>Strengthens the contractility of the myocardium (C)</p> Signup and view all the answers

What effect does epinephrine have on hyperglycemia?

<p>Increases glycogenolysis in the liver (B)</p> Signup and view all the answers

Which enzyme is responsible for metabolizing epinephrine?

<p>Monoamine oxidase (MAO) (A)</p> Signup and view all the answers

What is the final metabolite found in the urine after metabolizing epinephrine?

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

What is the mechanism of action for direct-acting adrenergic agonists?

<p>Bind to adrenergic receptors without interacting with presynaptic neurons (A)</p> Signup and view all the answers

Which process involves the removal of norepinephrine from the synaptic space?

<p>Uptake into storage vesicles (C)</p> Signup and view all the answers

What is the primary structure alteration that influences the affinity of adrenoceptors for various agents?

<p>Alterations in the primary structure of the receptors (A)</p> Signup and view all the answers

What is the rate-limiting step in the synthesis of norepinephrine?

<p>Hydroxylation of tyrosine (D)</p> Signup and view all the answers

Which type of adrenoceptors exhibit strong response to isoproterenol and less sensitivity to epinephrine and norepinephrine?

<p>β2 Receptors (B)</p> Signup and view all the answers

What is the enzyme responsible for decarboxylating DOPA to form dopamine?

<p>Aromatic l-amino acid decarboxylase (A)</p> Signup and view all the answers

Which drug can block the carrier system involved in the transport of dopamine into synaptic vesicles?

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

Which class of adrenoceptors primarily mediate classic effects involving constriction of smooth muscle?

<p>α1 Receptors (C)</p> Signup and view all the answers

What triggers the release of norepinephrine from the nerve junction?

<p>Influx of calcium ions (B)</p> Signup and view all the answers

What initiates the release of Ca2+ from the endoplasmic reticulum into the cytosol upon activation of α1 receptors?

<p>Generation of inositol-1,4,5-trisphosphate (IP3) and diacylglycerol (DAG) from phosphatidylinositol (B)</p> Signup and view all the answers

Which receptor subtype causes feedback inhibition of norepinephrine release from the stimulated adrenergic neuron?

<p>α2 Receptors (A)</p> Signup and view all the answers

What is the primary mechanism for termination of norepinephrine's effects?

<p>Recapture by an uptake system (C)</p> Signup and view all the answers

What enzyme is responsible for oxidizing recaptured norepinephrine in neuronal mitochondria?

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

What is the primary drug used in the emergency treatment of bronchospasm?

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

What is the drug of choice for the treatment of acute asthma and anaphylactic shock?

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

In chronic treatment of asthma, which drug is presently favored due to longer duration of action and minimal cardiac stimulatory effect?

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

Which drug may be used to restore cardiac rhythm in patients with cardiac arrest regardless of the cause?

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

What effect does epinephrine have when included in local anesthetic solutions?

<p>Prolongs the duration of local anesthesia (D)</p> Signup and view all the answers

Which route is the preferred route for epinephrine administration due to rapid absorption?

<p>Intramuscular (anterior thigh) (B)</p> Signup and view all the answers

What adverse CNS effects can epinephrine produce?

<p>Anxiety, fear, tension, headache, and tremor (A)</p> Signup and view all the answers

In which condition does epinephrine induce pulmonary edema?

<p>'Patients with hyperthyroidism' (D)</p> Signup and view all the answers

'What effect does cocaine have on the cardiovascular actions of epinephrine?'

<p>'Enhances cardiovascular actions' (D)</p> Signup and view all the answers

'What effect do β-blockers have on epinephrine's effects on β receptors?'

<p>Leave α receptor stimulation unopposed (C)</p> Signup and view all the answers

More Like This

Adrenergic Receptors Quiz
23 questions

Adrenergic Receptors Quiz

CourteousEpiphany avatar
CourteousEpiphany
Adrenergic Hormones and Receptors Quiz
5 questions
Alpha and Beta Adrenergic Receptors Quiz
33 questions
Adrenergic Receptors Flashcards
14 questions
Use Quizgecko on...
Browser
Browser