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Ratling [72]
3 years ago
8

Oth energy and matter can cross boundaries in a(n)... *

Biology
1 answer:
Goryan [66]3 years ago
8 0
Thermodynamic System
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When these muscles contract (during cold or fright), the slanted hair follicle is pulled upright, dimpling the skin surface with
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The muscles that contract (during cold or fright), the slanted hair follicle is pulled upright, dimpling the skin surface with goosebumps are called arrector pili muscle.

The arrector pili muscle are tiny muscle that attaches to the base of the hair follicle at one end  and to the dermal tissue on the other end. When the body feels cold or fright the body generate heat and the arrector pili muscle contract all at once, that causes goosebumps on the skin.

The arrector pili muscle acts as the thermoregulator. Straight stand hair increases air trapping, so that the heat loss from the body decreases. The arrector pili muscle are mediated by the sympathetic nervous system.

To learn more about sympathetic nervous system here

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When water falls from clouds to Earth's surface, this is known as transpiration condensation evaporation precipitation
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Answer:

(D) Z

Explanation:

Cellular respiration is a catabolic process by which cells produce energy by oxidising respiratory substrates such as glucose. It is a multistage process occurs in cytoplasm and in mitochondria of a cell. The first stage of cellular respiration is called glycolysis or EMP (Embden, Meyerhof and Parnas) pathway. This stage occurs in the cytoplasm of a cell which is labeled by Z in the given image.    

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