The highlighted structure is called pineal gland and it is proportionally smaller in humans compared to the similar structure in the sheep brain.
Sheeps have a small pineal gland in their elongated brain compared to that of rounded human brain's larger pineal gland. The pineal gland, often referred to as the conarium or epiphysis cerebri, is a small endocrine gland that is found in the brains of the majority of vertebrates. The pineal gland produces melatonin, a hormone derived from serotonin that controls sleep patterns in both seasonal and circadian cycles. The name of the gland comes from the way it resembles a pinecone. The epithalamus, which is at the center of the brain and situated between the two hemispheres, contains a groove where the two sides of the thalamus meet. This groove houses the pineal gland. The pineal gland is one of the circumventricular neuroendocrine secretory organs with the greatest blood solute permeability.
The majority of animals have pineal glands. The two photosensory organs found on the top of modern lampreys' heads were probably present in the vertebrate ancestor that all vertebrates share today. According to the skulls of numerous extinct Devonian fish, which have two parietal foramina, parietal eyes were once bilateral. The parietal eye and pineal gland of living tetrapods are most likely derived from the left and right parts of this organ.
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all cells are enclosed by a plasma membrane that is similar in and . question 14 options: thickness . . . composition permeability . . . content lucidity . . . texture structure . . . function
All cells are enclosed by a plasma membrane that is similar in structure and function.
Cell is the most basic unit of life. It is the building block of all the organisms. A cell is composed of cell organelles, cell membrane and cytoplasm. All of these components work together in order to keep the cell functional and alive.
Plasma membrane is the outer layer of the cell whose structure is composed of lipid bilayer along with proteins, carbohydrates and proteins. The function of the plasma membrane is to mediate the transport of molecules. The plasma membrane is semi-fluid in nature.
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osteoporosis is a disease that results in weakened, porous bones. it is most common in post-menopausal women. what type of change in bone cell activity could cause osteoporosis?
The decrease in estrogen that occurs during the perimenopausal transition period is what causes osteoporosis because it leads to a greater rate of bone resorption than bone growth.
What is osteoporosis?The hip, the backbone (spine), and the wrist are the areas of the body most commonly affected by osteoporosis, which is a disease that weakens the bones to the point where they shatter easily. Osteoporosis is sometimes referred to as a "silent illness" since its symptoms may not manifest themselves until a bone is fractured.
The deficiency of calcium during a lifetime is one of the factors that can contribute to the development of osteoporosis. A diet deficient in calcium has been linked to decreased bone density, an accelerated rate of bone loss, and an increased risk of fractures. Both men and women can experience bone loss if they severely restrict their food intake and maintain a low body weight.
Osteoporosis is caused by the drop in estrogen that happens throughout the perimenopausal transition phase. This decline promotes a larger rate of bone resorption than bone formation, which ultimately results in osteoporosis.
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this plate was inoculated with a bacterial lawn and exposed to uv light for 90-180 seconds and then incubated for 48 hours. is there visible evidence of dna repair on this plate?
This plate was inoculated with a bacterial lawn and exposed to UV light for 90-180 seconds and then incubated for 48 hours. Heat and ultraviolet.
Bacterial lawns can be produced manually with the aid of frivolously spreading a high quantity of microorganisms onto an agar plate using a sterile cotton swab or a Drigalski spatula. rather an automated gadget can be used including a spiral plater in which the plate is turned around and the sample is spread frivolously using an automated dispenser.
Most bacteria develop in colony layout and colonies will simplest seem on areas of the plate that were streaked on and appears like small white circles on a petri dish. however, for swarming (lawn) increase, it'll appear like a hazy blanket of boom that expand past the vicinity you made the streaking.
The microorganism was poured into what's known as a bacterial lawn on the agar plate. As the encompassing cells are inflamed and killed with the aid of the launched viruses, a clear spot at the agar---in the bacterial garden--develops, called a plaque.
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