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Dvinal [7]
4 years ago
7

What trends that took place during the course of human evolution? How did the cranium (shape, cranial capacity, size and shape o

f face, prognathism/orgnathism), dentition (size of the teeth, shape of the dental arcade, CP3 complex), limb proportions, and pelvis morphology (shape of the ilium) change from the Australopithecines up through modern humans. Be able to provide hominin examples to illustrate these changes.
Medicine
1 answer:
goldenfox [79]4 years ago
4 0

1)The evolution of modern humans from our hominid ancestor is commonly considered as having involved four major steps: evolving terrestriality, bipedalism, a large brain (encephalization) and civilization.

2)

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erastova [34]
<h2>Question ❓:</h2>

what is the correct sequence ofa ctions for performing mouth to mouth and nose breaths for an infant

<h2>Answer ❄️: </h2>

blow a breath steadily into the babys mouth and nose over 1 second. It should be sufficient to make the chest visibly rise. Keeping their head tilted and chin lifted, take your mouth away and watch for the chest to fall as air comes out. Take another breath and repeat this sequence 4 more times.

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2 years ago
A 17-year-old male develops pneumonia, diabetic ketoacidosis, and metabolic acidosis. Respiratory compensation to a metabolic ac
e-lub [12.9K]

Answer:

The best answer from the choices, to the question: The cause of the hyperventilation is described by which of the following statement:___, would be, B: A decrease in the bicarbonate concentration stimulates ventilation.

Explanation:

The acid-base balance in the human body, is a very restrictive one. Normal ranges in this base are: 7.35 to 7.45. Whenever the values go either below 7.35 or above 7.45, we are talking about a person going into acidosis or alkalosis. Both situations are pretty serious and they have to do with the balance between the amounts of bicarbonate, and CO2 in the form of carbonic acid, in the blood. The normal ratio of bicarbonate to carbonic acid, is usually 20:1. Chemoreceptors, especially central ones in the neck, measure constantly that the balance is kept and if this is not the case, then several mechanisms will be put into place to recover it. One such measure is respiratory, and the other is metabolic. In the case of this 17-year-old, he has a pneumonia, which means that from the start, one of his recovery mechanisms is impeded, which is the respiratory mechanism of balance. He is also having metabolic problems with his system of compensation because his body is already producing high levels of H+ ions and not enough bicarbonate. Hyperventilation in this person is attempting to expel as much CO2 as possible, to try and restore the balance. The first thing that is sensed by the receptors is the changing in the 20:1 ratio, the increase in pH due to too much carbonic acid, and thus the body initiates the use of CO2 expulsion by the lungs, while metabolic mechanisms come into play.

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3 years ago
In osteoporosis, the bones become weak due, in part, to bone reabsorption. Which cell type is probably highly active in this dis
Whitepunk [10]

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Osteoclast

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5 0
3 years ago
"A pregnant mother recently had an ultrasound that indicated massive defects in the formation of her unborn baby’s heart. Other
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Answer:

There is a low probability that a future pregnancy would exhibit similar phenotypes since it probably was a germinative line mutation that affected that egg.

Explanation:

The malformations of the unborn child, probably are due to a mutation in the germ cell of any or both parents. Germline mutations are detectable changes in a sperm or egg that we can see when the fetus is growing, as malformations since the original germ cell that was mutated divided itself to give more mutated cells for all the different parts of the fetus.

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Answer:Ginger Methods of Extraction of Drugs from Silver

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