Pregnenolone is produced from cholesterol and is a precursor to other steroid hormones, including progesterone, estrogen, testosterone, and DHEA. Pregnenolone levels decline with age, and a deficiency can lead to anxiety, mood imbalances, greater perceived stress, and poor cognitive function.
Answer: The 7 types of emotions are joy, contempt, surprise, sadness, fear, anger, and disgust.
Explanation: The frontal lobes and the amygdala are the most important parts of the brain when regarding emotions. Happy or positive emotions are hooked to the prefrontal cortex, while negative or sad emotions are linked to the amygdala.
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Answer:
The correct answer is: A) reticular dermis.
Explanation:
The dermis is one of the three layers of the skin, and is divided into two layers as well: papillary dermis and reticular dermis.
The papillary dermis has characteristic fingerlike projections called dermal papillae, which extend towards the epidermis (the outermost layer of the skin). These papillae contain blood vessels that nourish the hair follicles and the cells in the lower layers of the epidermis.
The reticular dermis, on the other hand, has no papillae, but instead has a dense irregular connective tissue filled with collagen and elastic fibers. In this region of the dermis is where sudoriferous glands, sebaceous glands, sensory nerve endings, arrector pili muscles, and blood vessels can be found.
