Author Question: Describe the biological actions by which certain stimuli are able to lower reactivity to pain. ... (Read 12 times)

erika

  • Hero Member
  • *****
  • Posts: 522
Describe the biological actions by which certain stimuli are able to lower reactivity to pain.
 
  What will be an ideal response?

Question 2

Describe the transduction process for gustatory signals.
 
  What will be an ideal response?



itsakadoozi

  • Sr. Member
  • ****
  • Posts: 317
Answer to Question 1

Answer: Pain signals are transmitted to the spinal cord and from there to the thalamus and to various cortical regions (anterior cingulate, primary and secondary somatosensory cortex). Pain reactivity can be diminished by interrupting the ascending pain pathways, by reducing the activity of the anterior cingulate cortex (reduced aversiveness), or by activating a descending neural circuit from the PAG to the spinal cord.

Answer to Question 2

Answer: Taste receptors code for five qualities (sweetness, bitterness, sourness, saltiness, and umami). Each receptor type involves a different transduction process. Hydrogen ions generate a sour taste, which controls a potassium channel. Bitter and sweet tastes are coded for by receptors containing gustducin and that reduce cyclic AMP. Sweet receptors also are coded by gustducin receptors but increase cyclic AMP. The umami signal involves a specific glutamate receptor (mGluR4). The pleasant taste of fat seems linked to receptors that detect free fatty acids in foods.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

For a complete list of videos, visit our video library