Answer:
Starting at the spinal cord, the subdivisions of the brachial plexus are (in order): roots, trunks, divisions, and cords.
Explanation:
The brachial plexus is a nervous network that is located at the base of the neck, and connects the spinal cord to all peripheral nerves in the arm. It is composed of five spinal roots (C5, C6, C7, C8 and T1) that join, forming three primary trunks: the upper trunk, which comes from the anterior branches of nerves C5 and C6, the middle trunk, comes from the anterior branch of nerve C7 and the lower trunk: it comes from the anterior branches of nerves C8 and T1. Once the clavicle is passed, each trunk is divided into an anterior and a posterior division, which will be reorganized to form the secondary trunks, fascicles or cords. The set of the posterior branches forms the posterior cord. The union of the anterior branches of the upper and middle trunk forms the lateral cord and the anterior branch of the lower trunk gives rise to the medial cord.
It was the reptiles that lived and successfully on land
Answer;
-Aggressive behavior
Dr. Han is studying what brain structure is associated with aggressive behavior among rats and is most likely to see the amygdala activated when using neuroimaging techniques.
Explanation;
-Aggression is a fascinating and distressing topic for the pet rat owner. We are normally intrigued or amused by aggressive behaviors like chasing and sidling, but we hate it when our pets hurt each other.
-Aggressive behaviors are strung together into sequences that vary in their intensity and duration. The lowest intensity encounters are chases.
Answer AND Explanation:
The central dogma of molecular biology describes the flow of genetic information in cells from DNA to messenger RNA (mRNA) to protein. Translation is the process by which mRNA is decoded and translated to produce a polypeptide sequence, otherwise known as a protein. This method of synthesizing proteins is directed by the mRNA and accomplished with the help of a ribosome, a large complex of ribosomal RNAs (rRNAs) and proteins.
