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.
Quick reactions/reflexes which do not need to be process by the brain in order to determine a response.
Answer:
yes
Explanation:
Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.
After Santiago slaughters the immense marlin in The Old Man and the Sea, by Ernest Hemingway, he lashes it to the side of his watercraft. The fish is eighteen feet long, longer than the watercraft, and Santiago knows he won't make great time going home in light of the additional weight and clumsiness of the fish. He doesn't get much of anywhere before the principal sharks strike the fish.
- there are two subspecies of this animal
- they can be found in india and sri lanka
- threats of these cats are habitat loss, hunting for their meat, and the crossbreading with other domestic cats
- they are listed as vulnerable because they are down to less than 10,000 cats
- it is one of the smallest cat species (two times smaller than a domestic cat)
- these animals can climb trees to avoid predators (making them very agile) but spend most time on ground
- they are nocturnal
- they are carnivores and eat lizards,birds, frogs and rodents.
- when captive in zoos, they are very friendly towards zoo keepers and there are 56 kept in zoos worldwide.
- in captivity, these animals can live to around 18 years.
hope this helps and please mark brainliest!
