Answer:
The correct answer will be option A.
Explanation:
The electrical impulses are generated in the sino-atrial node or SA node, a mass of cells which generates impulse in the upper atrium.
This electrical impulse transmits from the sino-atrial node to the atrio-ventricular node in the lower portion of the upper atrium through the internodal pathway- the pathway composed of atrial cells.
Once the impulse reaches the AV node, it is transferred to the ventricular portion of the heart through Bundle of His presence in the ventricular septum. This bundle of his divides into left and right ventricles through bundle branches and stimulates both the ventricles.
Thus, option-A is the correct answer.
Answer:
Insertion mutation
Explanation:
An extra letter is added.
Answer:
it destruct the autonomous nervous system.
Answer:
Lyme disease is characterized by a <u>red rash called erythema migrans</u> at the site of infection.
Explanation:
Lyme disease is caused by the bacterium Borrelia. It is a highly communicable disease, which spreads through the bite of infected tick in humans. At the site of the tick bite, a characteristic red expanding rash can be seen on the skin. This red rash is known as erythema migrans. Other symptoms of this disease include fever, fatigue and headache.
....meiosis.., however, I'm not sure that the zygote goes through division. After the two gametes intercept and FORM the zygote, I'm pretty sure the zygote doesn't deconstuct from a dipliod back into a hapliod
