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

Gangrenous dermatitis (necrotic dermatitis), G a ngrenous dermatitis (nec...

G a ngrenous dermatitis (necrotic dermatitis) A bacterial condition in chickens caused by spores of Clostridium septicum , sometimes that of Cl. novyi / Cl. edematiens a

Its possible to obtain probability of emergence of genotype?, How is it pos...

How is it possible to obtain the probability of emergence of a given genotype formed of more than one pair of different alleles with independent segregation from the knowledge of t

What is optic nerve, What is optic nerve The optic nerve contains more...

What is optic nerve The optic nerve contains more than one million axons that initiate in the ganglion cell layer of the retina. This structure originatcs at the back of the e

#title.zoology., #question.why obelia is considered of special interest in ...

#question.why obelia is considered of special interest in zoology.

Oestrous cycle, OESTROU S CYCLE - Also known as heat period. Common in...

OESTROU S CYCLE - Also known as heat period. Common in rabbit, cat, dog, sheeps. In this period desire for copulation occur. Possibility of fertilization is 100%.

What is mucoperiosteal flap, What is mucoperiosteal flap Silk is easy t...

What is mucoperiosteal flap Silk is easy to handle, ties with a slip knot, and is relatively inexpensive compared with other nonabsorbable suture materials currently available.

Glycosylated hemoglobin, Pre-Diabetes is a condition where blood sugar leve...

Pre-Diabetes is a condition where blood sugar level is above normal but below the value to be diagnosed as diabetes mellitus. It has been found that those people with blood sugar v

Define about the resistant starch, Define about the Resistant Starch? U...

Define about the Resistant Starch? Until 1980's starch was thought to be completely hydrolyzed and absorbed from the small intestine of man, independent of its source, type and

Explain valacyclovir, Valacyclovir (Valtrex) - Valacyclovir is an L-val...

Valacyclovir (Valtrex) - Valacyclovir is an L-valyl ester of acyclovir that is metabolized to acyclovir after oral administration, resultingin higher serum concentrations than

Mycoplasmosis-contagious caprine pleuropneumonia (ccpp), Contagious caprine...

Contagious caprine pleuropneumonia (CCPP) Mycoplasma mycoides subsp. capri (Mmc) is the main causative agent of caprine pleuropneumonia, a serious malady of goats in our countr

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