Answer:
The Caenorhabditis elegans dauer state is a hibernation-like state of diapause that displays a dramatic reduction in spontaneous locomotion.
Explanation:
Mutations affecting the neurotransmitter dopamine, which regulates voluntary movement in many organisms, can stimulate movement in dauers. The movement of quiescent animals is stimulated by conditions that reduce dopamine signaling and also by conditions predicted to increase dopamine signaling.The stimulation of movement by increased dopamine is much more pronounced in quiescent daf-2(−) dauer and dauer-like adult animals.
In C. elegans hermaphrodites, dopamine is produced by eight neurons and signals via at least four dopamine receptors, DOP-1 through DOP-4. In addition, a presynaptic reuptake transporter, DAT-1, removes dopamine from the extracellular space to terminate signaling. In C. elegans, dopamine is best known for mediating the “basal slowing response” in which the animal's movement slows when it encounters food.. Dopamine is thought to be released in response to food and to act on motor neurons to modulate the animal's movement . Animals that cannot produce dopamine fail to slow in response to food and exogenous dopamine slows the movement of animals cultured without food.The response to dopamine in this situation is complex, as the absence of specific dopamine receptors can have either positive or negative effects on movement.
half of their chromosomes from each parent
Explanation: you get half of your chromosomes from each of your parents
Answer:Genes that are located on the same chromosome are called linked genes. Alleles for these genes tend to segregate together during meiosis unless they are separated by crossing over. Crossing over occurs when two homologous chromosomes exchange genetic material during meiosis I.
so true
Explanation:
Answer:
Tetanus patients exhibit <u>opisthotonos</u> when muscle spasms cause them to arch their backs.
Explanation:
Tetanus is a bacterial infection caused by the bacterium Clostridium tetani The disease causing bacteria is found in dust, manure soil and saliva. This infection is characterized by muscle spasms that start at the jaw and progress to rest of the muscles of the body.
Tetanus patients may also exhibit extreme arched pose due to severe muscle spasms. This state of hyperextension and spasticity is known as opisthotonus.
