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son4ous [18]
3 years ago
10

I just need to know 1 and 2 please!

Biology
1 answer:
Natasha2012 [34]3 years ago
6 0
The answer to your question is
.3 million years is 300,000 years
.02 million years is 20,000 years
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What are the differences between the endocrine and nervous systems?
son4ous [18]

Answer:

Explanation:

The endocrine system is a complex of glands that secrete <u>hormones</u> as a chemical messenger. These hormones carry information and instructions throughout the bloodstream from one part of the body to another. These hormones control many body functions such as respiration, sensory perception, metabolisms, growth, reproduction, the mood among others.

On the other hand, the nervous system is made up of neurons that communicate with each other to extend a message (from our own body or the outside) to the brain, for analysis and further decision of what to do with that information. A group of neurons, sensory neurons, respond to several stimuli such as touch, light, and sound to let the brain know about the surrounding environment. Another group of neurons, motor neurons, work inside the body and carry signals to active muscle or glands.

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zvonat [6]

Answer:

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When a motor neuron and the skeletal muscle cell it innervates are at rest:?
Nuetrik [128]

<span>Particularly the skeletal muscles at rest gain most of their energy from the aerobic respiration of fatty acids. Hence fatty acids provide the majority of the energy for muscle metabolism when a person is exercising at 25% of VO2max. However, the motor neuron is at rest when a neuron is not receiving any input there will be a potential difference. Thus, the potential difference measured when the neuron is inactive and it is caled the resting membrane potential. </span>

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