Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. How is heart contraction triggered?
Heart contraction is independent from neuronal stimulus although it can be modulated by the autonomous nervous system in the heart there are pacemaker cells that trigger by themselves the action potentials that begin the muscle contraction. These cells are concentrated at two special points of the heart that are 1) the sinoatrial node (SA node) located in the superior portion of the right atrium and 2) the atrioventricular node (AV node) located near the interatrial septum.
The action potentials generated by depolarization of the SA node cells propagate cell to cell throughout the atria producing the atrial contraction, The atrial depolarization also propagates to the AV node that then transmits the electric impulse to the ventricles through specialized conduction bundles of the interventricular septum the bundle of His and then to the Purkinje fibers of the ventricle walls causing ventricular contraction. The atrial contraction precedes the ventricular contraction for blood to fill the ventricles before the ventricular contraction.
The repolarization of the SA node makes the ventricles relax and then the atria relax too.
(a) Name four examples of compounds which are classed as carbohydrate. (b) What elements are present in carbohydrates? (a) Sugars (glucose, fructose, maltose, sucro
ESR and CRP are elevated in almost all patients of arthritis and carditis and rarely in patients with chorea. ESR should be repeated periodically as it is useful in following the c
Explain about the Soil morphology Soil morphology is the description of the soil body and its general characteristics. The morphology of the soil is expressed by number, kinds
respiration in animals?
Q. Optional use values of biodiversity? Optional values are associated with potential use in the future. Accordingly one opts to conserve biodiversity based on the hope that it
Q. Tools used in Taxonomy? Before you plan for a field trip decide the tools and equipment required. Certain, equipments are necessary for plant collection. A collecting pick i
Which of the following most accurately explains the meaning of a repression lag? A. A repression lag refers to the time that it takes for the last full-length mRNA transcript t
Define the Binge Eating Disorder? Binge eating disorder is probably the most common eating disorder. Binge eating you may recall we studied as an element of bulimia nervosa. In
What are the two main morphological patterns of cnidarians? Concerning locomotion how do these forms differentiate from each other? Morphologically, cnidarians categorize as po
how these can be called as acellular?
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd