Mechanisms that affect the heart rate, Biology

Assignment Help:

Mechanisms that Affect the Heart Rate

Two different mechanisms affect the heart rate. Nerve impulse to the pacemaker region and hormonal influences. A branch of the vagues nerve of parasympathetic origin slows the heartbeat by releasing acetylcholine while another nerve of sympathetic origin releases epinepherine and norepinepherine at the pacemaker end to increase the heartbeat. Epinepherine is also a hormone that is released from the adrenal medulla into the blood. It accelerates heartbeat.

This you know is a well documented part of the fight-or-flight reaction. Apart from the vagus and sympathetic nerves, the pacemaker can be affected by temperature. This is observable when we have fever. Increased temperature increases the heart rate and fall in body temperature slows the heart rate.


Related Discussions:- Mechanisms that affect the heart rate

What is the process of protein synthesis, Q. After the fact that it is base...

Q. After the fact that it is based on information from mRNA what is the process of protein synthesis called? Protein synthesis is called translation of genetic information into

Colibacillosis of poultry, Colibacillosis of poultry Colibacillosis is...

Colibacillosis of poultry Colibacillosis is an important disease among poultry, especially among broiler chicks aged 6-9 weeks and less frequently of young chicks during first

Major conventional symbols & signs used in genetic family, What are the maj...

What are the major conventional symbols and signs used in genetic family trees? In the genetic family trees the male sex is usually represented by a square and the female by a

DNA, what is the genetic code of life

what is the genetic code of life

Describe pericardial rub and their characteristic, Describe Pericardial Rub...

Describe Pericardial Rub and their Characteristic ? Generation of sound: The sound is generated due to rubbing of visceral and parietal pericardial surfaces against each other

Acute aortic regurgitation-types of regurgitation, Acute Aortic Regurgitati...

Acute Aortic Regurgitation :  The most dramatic presentation occurs in dissection of the aortic root. Endocarditis of the native or prosthetic aortic valve may also lead to a

Explain carbohydrates - nutritions, Explain Carbohydrates - Nutritions? ...

Explain Carbohydrates - Nutritions? Liberal amounts of carbohydrates should be given i.e. around 60% to 65% of the total energy. However, care must be taken regarding the maxim

Describe the structure of chromatin and chromosomes, Describe how the struc...

Describe how the structure of chromatin and chromosomes facilitates the following functions: a) DNA packaging. b) Regulation of gene expression.  c) Replication at the

Agro industrial-complete feed blocks, Complete feed blocks For manufac...

Complete feed blocks For manufacturing the pellets, processes such as grinding, mixing, steaming and pressing and some times extruding, are applied using special and expensive

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd