BIOLOGY HIGH SCHOOL

Which best describes the blood flowing in an artery?a. It contains no red blood cells.
b. It is oxygen poor.
c. It moves away from the heart.
d. It contains no white blood cells.

Answers

Answer 1
Answer: C. It moves away from the heart

Arteries carry blood away from the heart, while veins carry blood to the heart.
Answer 2
Answer:

Answer:

The correct answer is c. It moves away from the heart.

Explanation:

An artery is a hollow blood vessels that carry blood into it from the heart to other parts of the body so the artery moves away from the heart. Arteries normally carry oxygenated blood to the organs and tissues and they are the part of the circulatory system.

As arteries carry blood so it also plays an important role in delivering nutrients and removal of waste products like carbon dioxide. Therefore it also helps in maintaining the pH of the blood. Arteries are also important in the circulation of immune cells in the body through blood.  

Therefore the correct answer is c. It moves away from the heart.

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What is true about all the atoms calcium gold argon iodine

Answers

Most likely the atoms of that elements oare compress. :)

During the swallowing reflex __________. during the swallowing reflex __________. the tongue closes the pharynx breathing rate increases the epiglottis closes the glottis the esophageal sphincter closes the esophagus

Answers

I believe that during swallowing the epiglottis closes the glottis. Epiglottis is a leaf-shaped cartilage located behind the tongue, at the top of the larynx, whose main function is to seal off the windpipe during eating, so as to prevent accidental inhalation of food. It is only during the process of swallowing that the epiglottis moves and performs this vital function. 

What was the experimental variable that Avery used when he repeated Griffith's work?

Answers

Answer:

the type of molecule-destroying enzyme he used

Explanation:

Frederick Griffith and Oswald Avery were scientific researchers who discovered DNA. Frederick Griffith began the research and Oswald Avery continued his research in 1944 when they made the discovery of DNA. When Avery repeated Griffith's research the experimental variable in Avery's experiment was the type of molecule-destroying enzyme he used.

If a gallon of milk and a cup of milk are both at 8C, the what of the gallon is higher

Answers

 A. potential energy because it depends on mass and the gallon has more mass. 

A major group of G protein-linked receptors contain seven transmembrane alpha helices. Where would you expect to find the portion of this receptor that interacts with the signaling ligand? A) within the membrane interior B) at the exterior surface C) at the cytosol surface D) in the interior of the Golgi

Answers

Answer: (B) At the exterior surface

Explanation:

G protein-linked receptors (GPLR) are also called G protein-coupled receptors, 7-Transmembrane receptors or heptahelical receptors. They conform a large protein family of receptors.

They helps to detect molecules (ligands) outside the cells. (At the exterior surface).

The LIGANDS that binds and activate these receptors include light-sensitive compounds (Opsins), odorants (olfactory receptors), pheromones (vomeronasal receptors which are situated near the vomer bone between the nose and the mouth), hormones and neurotransmitters (serotonin, dopamine, glutamate etc).

Let's take a bird's eye view at it.

° When a Ligand binds with a G protein-linked receptors (which occurs at the exterior surface), it undergoes a conformational change.

° As conformational change occurs, GPLR become active and interact with the G-proteins Heterotrimeric Subunits ( G-alpha, G-beta, G-gamma) in the plasma membrane (at the cytosol surface).

This step typically explains the ambiguity. i.e GPLRs receptors interacts with signaling ligands via the exterior surface but communication between GPLRs and G-proteins Heterotrimeric Subunits occurs in the cytosol membrane.

Hence, this Conformational Change then triggers the interaction between the GPLRs and a nearby G proteins.

I hope that helps!.

Are viruses living or non-living? Explain

Answers

No, they are not but some scientists argue that they are.
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