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zhuklara [117]
3 years ago
13

The human embryo's first blood cells arise in the ___

Biology
1 answer:
sukhopar [10]3 years ago
6 0
<span>The human embryo's first blood cells arise in the y</span>olk sac.
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The Old Faithful geyser found in Yellowstone Park is an example of _____. a feature resulting from earthquake activity a feature
Monica [59]

The given blank can be filled with a feature resulting from hot volcanic rock.  

The geysers refer to the rare characteristics on Earth, only about 1000 of them prevail, and more than half of those are situated in Yellowstone. For a geyser to develop, there must be a source of volcanic heat, enough groundwater, and a geologic plumbing system via which the heated water can escape.  

The absconding of water takes place when the groundwater is heated by the hot volcanic rocks. The intensifying steam bubbles push the water above via the fissures in the rock until they overflow from the geyser.  

With the absconding of the top layers of the water, the pressure on the hotter waters below diminishes, leading to a violent chain reaction of explosions, which expand the volume of the rising boiling water by up to 1500 times or more.  


4 0
3 years ago
Which reflex is triggered by food in the stomach, relaxes the ileocecal valve, and allows residue into the cecum?
kari74 [83]

Gastroileal reflex is triggered by food in the stomach, relaxes the ileocecal valve, and allows residue into the cecum.

The gastroileal reflex is triggered by the presence of food in the stomach as well as gastric peristalsis.

Gastroileal reflex brings about peristalsis in the ileum as well as the opening of the ileocecal valve, which in turn facilitates the emptying of the ileal constituents into the large intestine or colon.

The gastroileal reflex is one among the three extrinsic reflexes of the gastrointestinal tract. The other two include the gastrocolic reflex as well as the enterogastric reflex.

This type of gastrointestinal reflex is moderated by the vagus nerve and gastrin.

To learn more about peristalsis here

brainly.com/question/15265456

#SPJ4

6 0
1 year ago
How do enzymes speed up biochemical reactions?
Kay [80]

Answer:

Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. Many enzymes change shape when substrates bind.

Explanation:

4 0
3 years ago
Read 2 more answers
Ralph is looking at a blood vessel under a microscope as part of his study about the cardiovascular system.he notices that the v
-Dominant- [34]

Answer:

Ralph is looking at a vein (likely a muscular vein).

Explanation:

Of all three great types of vessel present in vertebrates (arterial, venous, lymphatic), only veins and lymphatic vessels may normally contain valves.  This is an essential feature of vessels which present low pressure flow, since it ensures that such flow is unidirectional.

Since blood cells are not typically found in lymphatic vessels, the vessel in question can be assumed to be a vein.

7 0
3 years ago
Protein breaks down into
amm1812

Answer:

amino acids

Explanation:

Proteins ingested in the diet are digested into amino acids or small peptides that can be absorbed by the intestine and transported in the blood.

3 0
3 years ago
Read 2 more answers
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