Some reminders are necessary:
Artery does not have valves, the blood pressure on it is very high, there is no risk of blood backflow, so it does not need valves
Arteries are vessels that transport blood from the heart to capillaries.
Veins are vessels that transport blood back to the heart from capillaries.
According to these reminders, you could conclude that:
A is false (no backflow in arteries)
C is false (no backflow in arteries)
D is false ( veins take blood to the heart)
so the right answer is B
They are referred to as toxins since they are toxic
A. the improvement of the body through intentional movement.
It is possible to strive to meet higher needs without having all one's basic needs met.
<h3>Hierarchy of human needs</h3>
Maslow, a pschologist, in 1943, compiled a hierarchy of needs into a five-tier model of human needs within a pyramid.
Moving from bottom of the hierarchy upwards, the needs are:
- physiological (food and clothing),
- safety (job security),
- love and belonging needs (friendship),
- esteem
- self-actualization
He was on the opinion that individuals must satisfy the basic lower level needs which includes Food , clothing and shelter,etc before going or having the desire to pursuing higher level growth needs.
However,some other critics / psychologists believed differently that it in as much as all the hierarchy needs were important and needed for human existence, it was possible that a need can be satisfied without following the hierarchy, For example, One psychologist, Diener explained that Even when one is hungry,he or she can still be happy with friends.
Therefore in conclusion, psychologists today believe that the order of needs can flexible due external circumstances or individual differences and it is possible to strive to meet higher needs without having all one's basic needs met.
See more on hierarchy of human needs: brainly.com/question/4094239
All of the above are true
