Cells must move materials through the {membrane} and throughout the {cytoplasm} to maintain {homeostasis} Movement of substances is regulated because membranes are {semi} permeable. Membranes are {phospholipid} bilayers that contain embedded {proteins} The cells external environment and cytoplasm are aqueous, meaning that solutes such as {salt}are dissolved in a solvent called {water} Water may travel slowly through the membrane by {osmosis} or quickly through protein channels called {aquaporins}
Answer:
Nitrogen is found in soils and plants, in the water we drink, and in the air we breathe. It is also essential to life: a key building block of DNA, which determines our genetics, is essential to plant growth, and therefore necessary for the food we grow.
Explanation:
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Answer:
For hh, the gametes can only carry h (the recessive allele). For both heterozygous individuals (Hh), the gametes can carry the H (dominant allele) or the h (recessive allele). For Hh, the gametes can carry the H (dominant allele) or the h (recessive allele). For HH, the gametes can only carry H (the dominant allele).
Explanation:
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Answer:
1 and 5,
2 and 6,
3 and 4
Explanation:
Intestinal phase: stomach empties and decreases secretions
The intestinal phase is the phase where stomach empties its contents(chyme) and decreases secretion. In this stage the duodenum responds to arriving chyme and moderates gastric activity through hormones and nervous reflexes.
The Chyme is the semi-fluid mass of partly digested food that is expelled by the stomach, through the pyloric valve, into the duodenum.
Gastric phase: stomach secretes juice and mixes food into chyme
The gastric phase is a period in which swallowed food and semi-digested protein ( peptides and amino acids ) activate gastric activity which secretes juice and mixes food into chyme. About two-thirds of gastric secretion occurs during this phase.
Cephalic phase: prepares stomach for arrival of food
The cephalic phase of digestion is the gastric secretion that occurs prior to when food enters the oral cavity. Cephalic phase result from the ignition of visual, olfactory, and auditory inputs to the brain and also induce anticipatory responses i.e prepare the gastrointestinal tract for the meal.
