I NEED AN HONEST ANSWER, PLS HELP!

When it contracts, the difference in air pressure forces air into the body_____________ *

EastWind [94]

Answer:

body cell

Explanation:

capillaries are used to transport oxygen to the cells of the body hence when the capillaries contract they increase pressure hence the oxygen diffuses into the body cells with the aid of tissue fluid

8 0

3 years ago

What is the control center of the entire nervous system

ira [324]

Answer:

I think brain and spinal cord

Explanation:

All together, the brain and the spinal cord serve the nervous system's command station. ... The peripheral nervous system's main job is to send information gathered by the body's sensory receptors to the CNS as quickly as possible.

3 0

3 years ago

One of the central themes in biology is how DNA RNA, and proteins are related. Describe how genetic information flows between Th

igor_vitrenko [27]

Answer/Explanation:

DNA is transcribed into RNA, RNA is translated into protein

The information contained in DNA can be copied (transcribed) onto a molecule of RNA, as these languages are essentially the same (although RNA uses uracil in place of thymidine). This process is carried out by an enzyme called RNA polymerase through the process of complementary base pairing, and occurs in the nucleus. The two strands of DNA are separated, and the RNA polymerase enzyme uses a template strand of DNA to synthesise a new molecule of RNA.

Once the RNA is produced (often called the messenger RNA (mRNA), as it contains the message from the DNA). The RNA is processed, before being exported into the cytoplasm. Here, translation can begin.

Translation is the process where mRNA is converted into a polypeptide sequence, which becomes a mature protein. This process occurs on the ribosome. The mRNA is attached to the ribosome, and special molecules called tRNAs are used to build a polypeptide chain from amino acids.

tRNAs recognise triplet (3 nucleotide) sequences on the mRNA called codons. They possess what is called an "anticodon", which is complementary to a codon on the mRNA, and also corresponds to a particular amino acid.

The ribosome moves along the length of the mRNA, permitting the attachment of tRNAs (and their corresponding amino acids) to their complementary sequence present on the mRNA. As these fall into place, the tRNA drops off its amino acid, and leaves. The same happens again, and a polypeptide bond occurs between the two amino acids. This keeps happening, until a full polypeptide chain is made.

This polypeptide chain is processed into a mature protein.

4 0

4 years ago

Name 2 examples of animals found in the desert. Include descriptions AND a picture of each.

mina [271]

A camel can be found in the desert and also a gila monster.
A camel has 11 toes (On each foot), long legs for travel, long eyelashes for sand,and humps that store water. All of these features help Camels go long ways for travel.
A gila mosters are venoumous lizards have a verey painful bite. Gila monsters latch on to their victims and eject their venom. Gila monster's diet mainly includes unborn eggs, newborn mammals (animals), and nests.

6 0

3 years ago

PLZ I REALLY NEED HELP: Give one piece of evidence from the eruption of Mount St. Helens that shows that geologic processes can

olga nikolaevna [1]

Answer:

Explanation:

The 1980 Mount St. Helens eruption was the most destructive in U.S. history. Fifty-seven people died, and thousands of animals were killed, according to USGS. More than 200 homes were destroyed, and more than 185 miles of roads and 15 miles of railways were damaged

8 0

3 years ago

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