Nervous System and Parasympathomimetics

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Questions and Answers

What components make up the nervous system?

Brain, spinal cord, sensory organs, and connecting nerves (correct)

Heart, lungs, and digestive organs

Muscles, joints, and connective tissues

Nerves, blood vessels, and muscles

What is the primary focus of the discussed study in the provided content?

Assessing the stress response in various animal models

Studying nerve damage in laboratory settings

Analyzing the effect of anesthetics on rats

Investigating glandular secretions influenced by parasympathomimetic drugs in rats (correct)

Which substance is referred to in the content as influencing glandular secretions?

Corticosteroids

Parasympathomimetic drugs (correct)

Non-steroidal anti-inflammatory drugs

Sympathomimetic agents

What is the significance of studying the nervous system in the context of glandular secretions?

It provides insights into hormonal balance and digestive processes Signup and view all the answers

What might be a potential application of understanding the effects of parasympathomimetic drugs?

Creating therapies for digestive disorders Signup and view all the answers

What type of glands are stimulated by acetylcholine and parasympathomimetics?

All types of glands Signup and view all the answers

Which of the following activities is influenced by cholinergic stimulation?

Secretion of digestive enzymes Signup and view all the answers

Which drug is known to block the effectiveness of M receptors?

Atropine Signup and view all the answers

What physiological secretions are increased by the action of acetylcholine?

Gastric juices Signup and view all the answers

How do parasympathomimetics affect tear glands?

They stimulate tear production Signup and view all the answers

What primarily serves as the control center of the nervous system?

Brain and spinal cord Signup and view all the answers

Which system is responsible for sending information to the central nervous system?

Peripheral nervous system Signup and view all the answers

What type of nerves are involved in regulating organ functions?

Afferent and efferent nerves Signup and view all the answers

Which of the following statements is true regarding the central nervous system?

It evaluates information and makes decisions. Signup and view all the answers

What components make up the central nervous system?

Brain and spinal cord Signup and view all the answers

What is the primary effect of M2 receptors found in the heart?

Cause bradycardia Signup and view all the answers

In which part of the body can M3 receptors be primarily found?

Gastrointestinal tract Signup and view all the answers

Which statement about M1 receptors is correct?

They increase gastric acid secretion. Signup and view all the answers

What type of effect do M2 receptors have on the heart?

Inhibitory causing decreased cardiac muscle contraction Signup and view all the answers

What is a characteristic action of M3 receptors in the gastrointestinal tract?

Promoting smooth muscle contraction Signup and view all the answers

What type of receptors are found in the glands being studied?

Muscarinic receptors Signup and view all the answers

What was the method of administration for the methacholine chloride in the experiment?

Intraperitoneal injection Signup and view all the answers

Which animal was used in the experiments to study the glands?

Rabbit Signup and view all the answers

What is the role of parasympathetic innervation in the function of these glands?

To regulate glandular secretion Signup and view all the answers

What is the dosage of methacholine chloride used in the experiment?

10 mg/kg Signup and view all the answers

Study Notes

Nervous System

Composed of the brain, spinal cord, sensory organs and nerves that connect these organs to the rest of the body.
The brain and spinal cord form the central nervous system (CNS) where information is processed and decisions are made.
Sensory nerves and sense organs of the peripheral nervous system (PNS) send information to CNS and regulate organ functions by efferent and afferent nerves.
Acetylcholine (Ach) and parasympathomimetic medications work on muscarinic receptors (M receptors).

Parasympathomimetics and Glandular Secretions

Acetylcholine (Ach) and parasympathomimetics stimulate secretions from mucous, sweat, salivary, and tear glands. Additionally, they stimulate secretory activity in the stomach, intestines, and pancreas.
M1 receptors are found in the central nervous system and gastric parietal cells. Stimulation increases acid secretion.
M2 receptors are found in the heart and have an inhibitory effect, causing bradycardia.
M3 receptors are found in the smooth muscles of the gastrointestinal tract.

Animal and Procedure

The animal used in this study is a Rabbit.
Inject 10mg/kg methacholine chloride intraperitoneally (I.P.)

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Description

This quiz covers the anatomy and functions of the nervous system, including the central and peripheral nervous systems. It also explores the role of acetylcholine and parasympathomimetics in glandular secretions and the effects on various receptors. Test your knowledge on how these systems interact and regulate bodily functions.