The swallowing mechanism consists of three stages, beginning with the oral phase that begins in the mouth. The second stage, called the pharyngeal phase, triggers the swallowing reflex that moves food through the throat, or pharynx. During the pharyngeal phase, the larynx closes and breathing stops while food begins to move through the throat to the esophagus. The closing of the larynx is accomplished by the epiglottis. During the third stage, food is moved down the esophagus to the stomach.
Answer:
Dissolved or gaseous substances have to pass through the cell membrane to get into or out of a cell. Diffusion occurs when particles spread. ... They move from a region where they are in high concentration to a region where they are in low concentration.
Explanation:
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Answer:
4. p.complement system c.saliva b.sneezing
<span>without myelination, information about limb movement moves slowly to the CNS and motor commands move slowly back to the muscles. by the time the motor command has reached the muscle, it may no longer be appropriate. as the neurons become myelinated, the speed of action potential increases which is why we observe improved balance, coordination, and movement.</span>
Answer:
The best option that describes meiosis is the last one: "It produces male and female sex cells"
Explanation:
Meiosis is the process of making offspring, from the joining of a sperm cell, from a male, and an egg cell, from a female, to the creation of a zygote. In order for life to be created (at least for a human baby), it'll need 46 chromosomes. And so 23 chromosome come from the sperm cell while the other 23 come from the egg cell.
