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

Agricultural activities - cause of air pollution, Agricultural activities -...

Agricultural activities - Cause of Air Pollution Agricultural activities too are a major cause of air pollution. About 60 to 65% of carbon dioxide is produced from burning of

Explain treatment of latent tb infection, Treatment of latent tb infection ...

Treatment of latent tb infection The risk of developing clinical tuberculosis is greatest in patients with latent TB who are also infected with HIV or are receiving immunosuppr

How do you determine if a molecule is polar or non-polar, How do you determ...

How do you determine if a molecule is polar or non-polar? A polar molecule is a molecule that has a net dipole moment because of its having unsymmetrical polar bonds

Hazards of oxygen therapy - respiratory failure, Hazards of O 2 Therapy ...

Hazards of O 2 Therapy Exposure to greater than 60 per cent O 2 , for a period of more than 36 hours, or exposure to 100 per cent 0, for a period of more than 6 hours, res

Define cancer - excessive fat intake, Define Cancer - excessive fat intake?...

Define Cancer - excessive fat intake? Role of fat in cancer is debatable. High fat intake is indicated as a risk factor to cancer of breast, colon etc. Saturated fat intake has

Pre-operative nursing management of cardiac surgical patient, PRE-OPERATIVE...

PRE-OPERATIVE NURSING MANAGEMENT OF CARDIAC SURGICAL PATIENTS Cardiac surgical patients generally get investigated thoroughly before getting referred to the surgeons. Many of

How are the heterotrophic beings divided, How are the heterotrophic beings ...

How are the heterotrophic beings divided in the ecological study of food interactions? The Heterotrophs are divided into consumers and decomposers. An ecosystem can survive wit

What is aflatoxin, Q. What is Aflatoxin? Aflatoxins are the most widely...

Q. What is Aflatoxin? Aflatoxins are the most widely studied of all mycotoxins. Knowledge of their existence dates from 1960, when more than 100,000 turkey died in England afte

Definition of rabies, Question 1 Explain various methods employed for ...

Question 1 Explain various methods employed for the lab diagnosis of rabies Definition of rabies Listing of various methods employed for rabies Explaining the meth

Explain phylum bryophyta, Phylum Bryophyta The Bryophytes include the m...

Phylum Bryophyta The Bryophytes include the mosses and their close relatives. They are widely diverse and grow in a variety of place. 1) Life cycle shows alternation of gene

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