The heart consists of four chambers in which blood flows. Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium. From the left atrium blood flows into the left ventricle
Answer: F
Explanation:
This is a false statement. A personal action plan can always be modified and it is depending on a person that has made it, because they are personal, the person who has made it can change it as they want.
Sometimes it is good for those types of plans to be not flexible because of the organization but it is a false statement that they should not be flexible all the time. They can be and it is also depending on a person's organization and will.
Answer:
The correct option is B: as synapses form, 20-80% of the surrounding neurons die
Explanation:
One very surprising aspect of growth of brain is how cells are programmed to die, and thus creates space for connective structures. Thus, the formulation of synapses is accompanied by the death of 20 to 80 percent of neurons, although this is dependent on the region of the brain. It is however fortunate that the prenatal period is accompanied by the production of more neurons by the neural tube capable of always satisfying the needs of the brain.
