The arrector pili muscles cause hairs to stand on end when the body is chilled. These are tiny muscles in the skin that connect hair follicles to skin tissue. The muscles contract due to information from autonomic nerves located within these muscles.
The arrector pili muscles are smooth, fan-shaped muscles. When the body becomes cold, these muscles contract, making the hairs connected to them stand on end. The muscle contractions press on nearby oil glands causing the skin to form "goose bumps." Other names for these muscles include erector pili muscles and pilomotor muscles. All mammals have these types of muscles.Learn More
Heredity factors influence what an organism develops into because of genetic influences, whereas the environment plays a role in determining what the organism becomes. One example of this is height, which is partially determined by the person's genes, but is also determined by dietary differences.Full Answer >
DNA replicates in order for cells to divide, withy a parent cell divides giving each daughter cell the full DNA string in each nucleus. Without cell division, an organism cannot grow into a plant, a human or an animal. DNA replication allows all cells to contain the full genetic code for the body.Full Answer >
The term "protein synthesis" refers to the making of a protein. This process begins in the nucleus and then continues in the ribosomes. Protein synthesis is comprised of two parts: DNA transcription and DNA translation.Full Answer >
Protein synthesis takes place in the cytoplasm of a cell and on the rough endoplasmic reticulum (ER).Full Answer >