To warm the body in the cold: vitamin D is synthesized, sweat glands release sweat, sebaceous glands release oil, arrector pili muscles contract to keep hair straight, melanin is produced. What moist epithelial membrane lines body cavities that open outwards: synovium cutaneous serous mucosa peritoneum Serous fluid reduces friction: in moving joints, such as the knee, between organs and the cavities in which they reside in the lungs, when chewing food around the brain
1. The erector pili muscles are all the muscles attached to the
hair follicles in mammals. These muscles contract, causing the hairs to
on the skin to stand like a machanismo for
thermoregulation.
Therefore, the correct option would be: the erector pilli
the muscles contract to keep the hair straight.
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2. Serous membranes contain the epithelial cells that line the body
cavities that do not open to the outside. pleural, pericardial and
peritoneal membranes are serous membranes. The skin membrane is
commonly called skin.
The mucous membrane covers the body cavities and opens to
outside. Synovial membranes line bones within bones
joints.
The correct answer would be mucus.
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3. The visceral serous membrane lines the organs and
the parietal serous membrane lines the cavities. The serous fluid is
present between these two membranes and prevents friction
between the organs and the cavities in which they reside.
So the correct option would be between the organs and the
cavities in which they reside.