Option A,
both limit movement of substances through the system
The sphincter muscle usually surrounds the openings in the body such as urethra, anus and performs the function of tightly closing the openings. When once the messages are received from the nervous system the sphincter relaxes and releases the material out of the opening during urination of excreting
The same is the function of valves in the circulatory system. They also prohibits the entry of blood from one chamber to other and then to the main circulatory system. The relaxes on receiving a signal from the brain and thus transfer blood from one chamber to the other.
Earth climate zones are produced
Answer:
Chemical and mechanical digestion are the two methods your body uses to break down foods. Mechanical digestion involves physical movement to make foods smaller. Chemical digestion uses enzymes to break down food.
Explanation:
Answer:
Nancy put them in developer for a short time, that is to say that the image was very clear and even though I later washed them and ran them through the fixing solution they no longer had a solution
Explanation:
The development of dental radiographs has three stages:
The first is to place the radiograph in developer, the second to wash it in water and the third to fix the image and define it with fixative.
The developer is in charge of giving the contrast to the radiographic image and the radiopaque-radiolucent colors, if the radiographic plate lasts less time or the developer is altered due to misuse / maintenance, it will not look correctly and will have a dim image appearance.
Answer:
perform photosynthesis and release water vapor store water and glucose
absorb carbon dioxide
release oxygen
Explanation:
The primary function of the leaf is the conversation of carbon dioxide, water and UV light into sugar (glucose) and oxygen.
Transpiration refers to the evaporation of water via the leaves.