B <span>Begin chest compressions.</span>
The minimum amount of aerobic activity that one should engage in is 30
minutes 3 times a week, less than 30 minutes will not be effective.
Answer:
No, we are just the food supply.
Explanation:
We are pretty much the salad a pregnant lady eats.
:/
A fetus is considered viable as early as 24 weeks.
<h3>Age of viability of fetuses</h3>
A fetus is formed from a zygote.
A fetus is considered viable when it can survive and become a normal human irrespective of whether it gets to the required gestation period before being delivered.
This period has been found to be as early as the 24th week after fertilization.
More on fetuses can be found here: brainly.com/question/7964921
#SPJ11
Answer:
Myelinated Axons; leak channels are insulated by myelin leading to less loss of current flow and better conduction velocity. Ion channels omly located at nodes of ranvier; thus signal has sultatory conduction along myelin sheaths and jumps and move much quicker
Demyelinating diseases; along locations where myelin sheaths once was current links occur and conduction slows, the signal cannot make it very far because it looses energy as it travels through the axon
Unmyelinated axon; Ion channels are sequentially placed all along axons; thus it takes longer to send signal down axon. the energy isn't leaked out, it still contains the same signal but it is simply slower. distance between voltage gated channels needs to be small enough so local current flow can depolarize the membrane.
N/B; Harder to generate action potential in demyelinating disease
axon diameter( bigger diameter= less resistance= faster current).
