Answer: b) is waves of muscular contractions that move along the length of the digestive tract.
Explanation:
a) is not right, since the movement is triggered by a signal sent to the brain, which coordinates the movements.
c) is not right, since the esophagus smooth muscle is arranged in circular and longitudinal muscle layers.
NOTE: the peristalsis do not only ocurrs in the esophagus. It also occurs in all the digestive tract, as well as in the bile conducts and also in the urinary system, to conduct the urine from the kidneys to the bladder.
Full moon should be the correct answer choice
Answer:
Carbon enters the atmosphere as carbon dioxide from respiration and combustion. Carbon dioxide is absorbed by producers to make glucose in photosynthesis
Growth factors are hormones, proteins, or steroid molecules that regulate many cellular functions. They can stimulate the cell division by giving the signal to the cell to progress in the cell cycle.
<u>Explanation</u>:
Growth factors are naturally produced within the body and travels through the body to bind to their receptors present on their target cells. These growth factors are capable of signalling the cell to divide, proliferate, or heel. Their main aim is to signal or tell other cell when to do and what to do. Due to the binding with the receptors the growth factors activates specific genes.
The virus that causes rabies travels up nerve cells to the brain and spinal cord. Endosomes cell structures will allow the virus to move through the nerve cells
The main function of endosomes is intracellular sorting. They control the movement of proteins and lipids between the plasma membrane Golgi, the trans-Golgi network (TGN), and vacuoles and lysosomes, among other subcellular compartments in the secretory and endocytic pathway.
Endocytic carrier vesicles move materials destined for lysosomal breakdown from early endosomes to late endosomes. Later, late endosomes merge with transport vesicles carrying lysosomal hydrolases from the trans-Golgi network (TGN), maturing them into lysosomes.
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