Which of the following animals has radial symmetry?

all fibers of the semimembranosus muscle converge to insert on the . all fibers of the semimembranosus muscle converge to insert

miss Akunina [59]

All fibers of the semimembranosus muscle are converged to insert on the posterior tibia.

Semimembranosus muscle is amongst the hamstring muscles that are present in the posterior region of the thighs. These are the muscles responsible for the extension of the hips and flexion of the knee. The innervation to this muscle is provided by the tibial nerve.

Tibia is also called the shinbone. It is one of the two bones of the lower leg. The bone carries the maximum of the body's weight and gains support from the fibula, the other bone of the lower leg. Tibia is also the most commonly fractured bone in maximum people.

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8 0

1 year ago

Cervical pregnancies are extremely rare. Women undergoing cervical pregnancies often experience unusual vaginal bleeding. In ext

Alchen [17]

Answer:

Ectopic pregnancy can cause the burst of fallopian tube. If previous ectopic pregnancy occured then again onset of this type of pregnancy may lead to life threatening bleeding. Having the abdominal surgery before may also proved as a risk.

6 0

3 years ago

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Human blood consistes og blood groups a b and o however there is one ab which contains a and b in the same geno type what i this

Salsk061 [2.6K]

It is Codominance. Examples for this phenomenon is ABO blood groups.

8 0

3 years ago

The histone proteins are among the most slowly evolving proteins. For example, a histone protein called histone H4 in cows and p

juin [17]

The statement is true, histones are proteins that are high in the amino acids lysine and arginine, making them extremely basic in their structure.

Histones control the degree of packaging of DNA during the processes of gene expression, replication or repair of hereditary material, among many others.

Histones H2A, H2B, H3 and H4 are small and basic proteins that are highly conserved in evolution and are composed of a globular domain at the carboxy-end, and by regions known as "tails", which are found at the amino-terminal end.

These tails are high in the amino acids lysine and arginine, which give them a positive charge.

This region is the site of numerous post-translational modifications that, it has been proposed, would modify the histone charge, altering the accessibility of the DNA and the protein / protein interactions with the nucleosome.

Chromatin compaction occurs due to the interaction between the negative charges of DNA and the positive charges of amino acids, mainly located on the tails of histones H3 and H4.

Therefore, we can conclude that the modifications on the amino acids lysine and arginine that form the basic part of the histone structure alter their functions.

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8 0

2 years ago

Several hours after your last meal, declining blood glucose levels stimulate release of the hormone ________, which stimulates g

WITCHER [35]

Several hours after your last meal, declining blood glucose levels stimulate release of the hormone <u>glucagon</u> , which stimulates glycogenolysis, lipolysis and fat mobilization, and gluconeogenesis.

<h3>How does glucagon stimulate gluconeogenesis?</h3>

The biological process through which glycogen degrades into glucose and glucose-1-phosphate is known as glycogenolysis. Hepatocytes and myocytes both participate in the response. Two important enzymes, glycogen phosphorylase and phosphorylase kinase, control the process.

By increasing the activity of hepatic adipose triglyceride lipase, intrahepatic lipolysis, hepatic acetyl-CoA content, and pyruvate carboxylase flux, as well as increasing mitochondrial fat oxidation, glucagon stimulates hepatic gluconeogenesis. All of these actions are mediated by stimulation of the inositol kinase.

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5 0

1 year ago