Describe the neural, chemical, and physical changes that increase the rate and depth of ventilation during exercise
What will be an ideal response
Anticipation of exercise generates neural input to the limbic system. Sensory input is provided from proprioceptors and motor input is provided from the primary motor cortex. As the partial pressure of oxygen falls due to increased consumption, the partial pressure of carbon dioxide and the temperature increase due to metabolic activity in muscle fibers. Also, carbon dioxide is added via the buffering of the hydrogen ions produced as a result of lactic acid production. Chemoreceptors sense the changes in partial pressure and notify the medullary rhythmicity center to increase the rate and depth of breathing.
You might also like to view...
The time in which cross bridges are active is called the period of ________.
Fill in the blank(s) with the appropriate word(s).
Briefly describe the glycocalyx and its functions
What will be an ideal response
Answer the following statements true (T) or false (F)
1. The peritoneum is the most extensive serous membrane in the body. 2. Peyer's patches are found in the submucosa of the distal end of the small intestine. 3. The myenteric nerve plexus provides the major nerve supply to the GI tract wall and controls GI motility. 4. The first teeth to appear are the deciduous teeth. 5. Dentin anchors the tooth in place.
How many "heads" does each myosin molecule have?
a. 5 b. 4 c. 3 d. 2 e. 1