Answer: The nucleolus works to transcribe ribosomal RNA (RNA) and it forms incomplete ribosomes by combining proteins and RNA. Other functions of this structure include transporting molecules, vital substances and ions to ensure efficient cell metabolism.
Explanation:
The nucleolus is the largest structure in the nucleus of eukaryotic cells, where it primarily serves as the site of ribosome synthesis and assembly. Nucleoli also have other important functions like assembly of signal recognition particles and playing a role in the cell's response to stress. Nucleoli are made of proteins and RNA and form around specific chromosomal regions.
Explanation:
When calcium levels in the blood become too low, parathyroid hormone leads to an increase in calcium by degrading bone. In response, calcitonin from the thyroid is released when the levels are high again, to decrease calcium levels in the blood.
Further Explanation:
During homeostasis the body maintains a constant internal balance in pH, temperature, blood pressure etc. Cells in a multicellular organism become specialized for particular tasks and communicate with one another in order to maintain homeostasis. Within the human body these are known as hormone cascades, where several complex steps occur- the tissues signal to one another with the use of hormones released by the endocrine system. The regulation (increase and decrease) of these secretions is achieved by negative feedback loops, where the release of certain substances during a cascade in turn halts the secretion of hormones at earlier stages.
In the body calcium homeostasis, which is generally defined as the maintenance of specific internal conditions, is mediated by the endocrine system through hormonal control. This regulates the calcium flux between the bloodstream and the bone; and the hormones responsible, change the ratio of osteoclast activity to osteoblast activity -osteoblasts build bone while osteoclasts breakdown or degrade bone.
Hormones responsible include calcitonin (from special parafollicular cells in the thyroid gland), calcitriol (activated vitamin D) and the parathyroid hormone (from the parathyroid glands). These affect the absorption of calcium from the gut, or kidney reabsorption; both parathyroid hormone and calcitriol act by causing the increase of calcium ions into the bloodstream as the bone is degraded by osteoclasts.
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During El Niño, the jet stream is oriented from west to east across the southern portion of the United States, making the region more susceptible to severe weather outbreaks.
Olfactory receptors would play the biggest part in alerting you when you have forgotten to wash your gym socks for 3 weeks.
<h3>How are the olfactory receptors activated?</h3>
Olfactory receptor, often known as the "smell receptor," is a protein that can bind odor molecules and is essential for the perception of smell (olfaction). Arthropods, terrestrial vertebrates, fish, and other creatures all share these receptors. Airborne odor molecules that reach the nasal cavity and bind to olfactory receptors can be detected by olfactory receptors.
The bipolar neurons themselves are specialized because each olfactory sensory neuron has a single type of receptor on its cilia, and those receptors are designed to detect particular odorants. The hypothalamus receives information from the olfactory tracts. In the mucus, odorants break down and attach to receptors. The olfactory bulbs get impulses from mitral cells.
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Answer:
I think its the first one The penny absorbs the light as it enters the cup.
Explanation:
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