C. a rise in blood carbon dioxide concentration
Explanation:
Negative feed back mechanism refers to the control mechanism in which a product of a particular pathway controls the switch on and switch off of that particular pathway.
Since breathing increases the blood oxygen concentration and lowers carbon dioxide concentration and pH. The sensors that regulate the breathing should respond to oxygen concentration as the carbon dioxide is the by-product of respiration and is responsible for increasing blood pH. Thus increased Carbon dioxide levels in blood is the only factor which will trigger breathing.
Answer:
For a approximate answer, you need the speed of the s-wave which is not in the question, to find the time.
Explanation:
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.
The <u>nervous system</u> is one of the most sophisticated communication systems on the planet.
<u>Explanation:</u>
The diverse assembly of nerves and specific cells identified as neurons which are responsible for coordinating actions and sensory by sending signals among the various parts of the body, thus collectively understood as the nervous system. By fact it is the electrical circuitry of the body.
The nervous system is systemically composed of two parts: the pivotal nervous system and the peripheral nervous system. Here the pivotal comprises of the brain and spinal cord, although the peripheral constitutes primarily of nerves, which are interconnected strings of long fibers or axons, which link the pivotal to every other part of the organism.
Answer:
A
Explanation:
I am not that sure whether is A
