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 bicuspid aortic, What is bicuspid aortic? Bicuspid aortic val...

What is bicuspid aortic? Bicuspid aortic valve is the most common form of CHD seen in adults. Isolated bicuspid aortic valves may be stenotic or non-stenotic to start with. T

How sugar is used in bakery application, How Sugar is used in Bakery Applic...

How Sugar is used in Bakery Application? In bakery applications, sugars are used to impart flavor, aroma and color. During the mixing process, excess gluten development can mak

Define the spatial processes, Define the Spatial processes? Environment...

Define the Spatial processes? Environmental and integrative biology cuts across a wide array of spatial scales, and theoretical approaches that take into account these widely v

Describe the external features of the heart, Question 1 Describe the exter...

Question 1 Describe the external features of the heart. Add a note on circulation of blood within the heart Question 2 Discuss the major joints of thorax and pelvis Quest

Promotion - stages of carcinogenesis, Promotion - Stages of carcinogenesis ...

Promotion - Stages of carcinogenesis The second stage or promotion is reversible and does not include changes in structure of DNA but rather in the expression of the genome of

Eggs, What is the type of egg in which yolk is absent?

What is the type of egg in which yolk is absent?

Define the acute phase of spinal trauma disease, Define the Acute Phase of ...

Define the Acute Phase of spinal trauma Disease? Nutritional support should start within 3-5 days or as early as possible to prevent the onset of malnutrition and secondary il

Define precautions for preparation of bacterial smear, Define Precautions f...

Define Precautions for preparation of bacterial smear 1. The slide should not be greasy. 2. Hold the slide by their edges only. 3. Label should not come in contact with s

Signal for ribosome to begin translating the transcript, Which of the follo...

Which of the following serves as a signal for the ribosome to begin translating the transcript? A. Addition of the poly a tail to the 3' end of the transcript B. Deamination

Explain the disadvantages of fixation, Explain the Disadvantages of Fixatio...

Explain the Disadvantages of Fixation? Fixation has following disadvantages also. These are highlighted herewith: (i) It distorts the cell's appearance. (ii) Motility can

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