Answer:
The correct answer is option A. "skin".
Explanation:
Hair and nails are derived from cells of the skin. The cells of the skin have keratin, a protein that creates a protective barrier against the environmental factors that could affect them. The hair and nails are modifications of skin cells, that have keratin but with additional features. The hair is made of 95% keratin and is formed of three components: medulla, cuticle and cortex. The nail cells are made from keratin as well, forming a horn-like structure that is replaced by skin cells constantly.
B. testosterone
C. estrogen
D. insulin
The hormone does the pineal gland release A. melatonin. Therefore , A. melatonin is correct .
Pineal Gland: The pineal gland is located deep within the brain, in the epithalamus region. It is a photosensitive organ, which means it can detect changes in light and darkness.
Melatonin Production: Melatonin production is closely tied to the perception of light. When the surroundings become dark, the pineal gland is stimulated to produce melatonin, which is released into the bloodstream.
Circadian Rhythms: Melatonin is a key player in the body's circadian rhythms, influencing the sleep-wake cycle, body temperature, and various hormonal fluctuations throughout the day and night.
Sleep Regulation: The pineal gland's release of melatonin helps promote drowsiness and prepares the body for sleep. This is why melatonin supplements are sometimes used to address sleep disorders or jet lag.
Other Functions: Beyond regulating sleep, melatonin also has antioxidant properties and is thought to play a role in immune system support and the regulation of reproductive hormones.
Light Exposure: The suppression of melatonin production during the day is primarily due to exposure to natural and artificial light. This is why it's often recommended to limit exposure to screens before bedtime to help maintain healthy sleep patterns.
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Answers:
A. melatonin
Explanation:
Melatonin is a neurotropic hormone with the antioxidant group indolamina, which is synthesized by pincal glands located in the brain from the amino acid compound tryptophan.
Answer:
The stomach and small intestines absorb the glucose and then release it into the bloodstream. Once in the bloodstream, glucose can be used immediately for energy or stored in our bodies, to be used later
Answer:
The process of sharing results and working together to develop new hypotheses and experiments is known as collaboration.
Explanation:
Nutrients from fertilizers, such as nitrogen and phosphorus, can be harmful to aquatic ecosystems primarily because they promote excessive growth of algae and aquatic plants. Hence option b "The increase in algae population reduces oxygen in the water" is correct.
This excessive growth is known as eutrophication. The process unfolds as follows:
Nutrient Input: Fertilizers with nitrogen and phosphorus are often utilized in residential and agricultural settings. These nutrients may be introduced into surrounding water bodies by runoff from these locations.
Algal Blooms: Nutrients function as fertilisers for algae and aquatic plants, causing algal blooms. Algal blooms are therefore created as a result of the fast growth in the population of algae. These blooms can completely cover the water's surface, turning it green or murky.
Oxygen Depletion: The process of decomposition consumes oxygen when the algae and aquatic plants die and degrade. An higher need for oxygen results from the large amount of organic material from the deceased organisms. As a result, the amount of dissolved oxygen in the water may decrease.
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