Answer:
b i think i am sorry if am wrong
Explanation:
Sebum is secreted into hair follicles by sebaceous glands. Sebum is an oil that protects the skin from outside elements and keeps it nice and moist.
The numerous varieties of hair that can be found on the body are produced by the hair follicles.
<h3>What gland is referred to as sebaceous?</h3>
Sebaceous glands are tiny oil-producing glands found in mammal skin. Typically linked to hair follicles, sebaceous glands secrete a fatty substance called sebum into the follicular duct, which subsequently travels to the skin's surface.
<h3>What are the sebaceous glands used for?</h3>
- Sebum is a complex mixture of oils that includes triglycerides and products of fatty acid breakdown, wax esters, squalene, cholesterol esters, and cholesterol.
- The typical function of sebaceous glands is to create and secrete sebum.
- Sebum makes the skin more resistant to moisture and lubricates it to defend against abrasion.
<h3>Where can you find the most sebaceous glands?</h3>
The face, scalp, chest, and back have the biggest and most sebaceous glands.
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Answer:
Ball-and-stick models show the bonds between atoms, but not the relative sizes of the atoms. Space-filling models show the relative sizes of atoms, but not the bonds between atoms.
Explanation:
Chemically, it is hard to understand the complex structure and shapes of the atoms and molecules. For better understanding, scientists have different models that help show the molecules in different prospects. For example, ball-and-stick and space-filling models.
The ball-and-stick model shows the three-dimensional arrangement of atoms and bonds. This model has a limitation that the identification of atoms requires a key to color representations. This model also does not show the relative size of atoms.
The space-filling model shows a three-dimensional arrangement as well as the relative size between atoms. Bonding between atoms can sometimes be difficult to distinguish in this model.
Mirror neurons fire demonstrates the ability of primates to empathize with another organism.
Mirror neurons are a class of neurons that modulate their activity both when an individual executes a specific motor act and when they observe the same or similar act performed by another individual.
Recent studies have shown that the mirror neurons have been hailed as a cornerstone of human empathy, language, and other vital processes.
These neurons are initially found as motor command neurons present in the frontal lobes of the brain and the prefrontal areas of the brain.
These are neurons which fire when a person moves and these are regular motor command neurons, orchestrating a sequence of muscles that allow the person to move something or do some other action.
A subset of these neurons also fire when that person simply watches another person move and do exactly the same action. So these neurons are performing a virtual reality simulation in the brain.
Another example of this is phantom limb.
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The right answer is "An archeological dig finding fossil remains of Australopithecus Africanus in Europe and Asia". Homo erectus temporal range is, according to the Institute of Human Origins, 1.8 million to 50,000 years ago. The Australopithecus Africanus however was on our planet before that, 3 to 2 million years ago. So if a fossil specimen of Australopithecus Africanus was to be found in any place of Europe or Asia, the theory which assures that Homo erectus was the first hominid to leave Africa would then be invalid.
