Answer:
Salut!
- Light enters the eye through the cornea.
- Light travels to the macula within the retina.
- Rhodopsin absorbs light, and the Vitamin A changes shape.
- Vitamin A detaches from the rhodopsin, and some vitamin A is lost.
- Vitamin A from the bloodstream replenishes what is lost. The vitamin A returns to its original shape.
Explanation:
Retina is the part of the eye that contains photosensitive cells that capture light and produce the electrical signals that the brain perceives as images. These photosensitive cells are of two kinds:
Rods contain the photosensitive pigment, rhodopsin that is needed for vision at night or in dim light. Cones function in bright light.
Rhodopsin Bleaching:
Vision in bright or excessive light requires a process called rhodopsin bleaching which is the degradation of rhodopsin upon exposure to light. Upon contact with light, rhodopsin goes through structural changes characterized by the conversion of a pigment derived from Vitamin A, 11-<em>cis</em> retinal to all <em>trans</em> retinal. This chemical conversion initiates a photo-transduction reaction (reaction in which a photon of light is converted into electrical signals) that produces the electrical signals that travel to the brain via the optic nerve. The brain converts the electrical signals to images. This is followed by rhodopsin regeneration in the dark in which all <em>trans</em> retinal is converted back into 11 <em>cis</em> retinal.
Answer:
The following are examples of scientific questions
How fast do cheetahs run?
Does adding fertilizer to the soil help plants grow faster?
What do pelicans eat?
Why are my neighbors going to the mall?
Explanation:
An essential part of science is asking questions.
A good scientific question is that it can be answered by direct observations or with scientific tools.
How fast do cheetahs run?
Does adding fertilizer to the soil help plants grow faster?
What do pelicans eat?
Why are my neighbors going to the mall?
Examples of questions that are not scientific are based on values or opinions like what people believe is right or wrong, or beautiful or ugly.
Do fish like living in aquariums?
Does my dog like her bone better than her Frisbee?
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In the medical profession, understanding the body position, direction and planes creates a common ground for the professionals to communicate in their work. For instance, if a nurse write down a medical note concerning a patient, the doctor will know exactly the part of the body that the nurse is referring to in her notes. It also makes it easy for doctors and nurses to diagnose the parts of the body where their patients are having problems. Thus, knowledge of human anatomy provides uniformity and precision in structures identification.
I would say the last one. Yes, the coral reef in the south is being threaten but, it’s not the only one. Many other reefs are being threatened. Why? To find the problem to this reef you need to find the problems of other reefs and compare the data. Which ever the most problem cause you get rid of that first.
