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Physiology
week 7-13
| Question | Answer |
|---|---|
| T or F: The magnitude of the action potential peaks when the sodium channels close. | True |
| The mechanisms that produce and maintain the resting membrane potential do so by producing a | slight excess of positive ions on the outer surface of the plasma membrane. |
| T or F: Neurons are the only living cells that maintain a difference in the concentration of ions across their membranes. | False |
| Which membrane receptor acts to directly change ion permeability when stimulated? | Gated-channel receptor |
| The fastest nerve fibers in the body can conduct an impulse that is how much faster than the slowest fibers in the body? | Almost 300 times faster |
| If the dorsal root ganglia of the spinal nerve were destroyed, a person would lose _____ related to that pathway. | sensory perception |
| Danielle has sustained an injury that has reduced her ability to complete simple tasks such as lifting a pencil, manipulating eating utensils, and brushing her hair. The injury has affected the _____ motor pathways _____ the central nervous system (CNS). | voluntary; outside |
| Nerves that innervate the floor of the pelvic cavity and some of the surrounding areas are found in the _____ plexus. You Answered | coccygeal |
| Erythrocytes begin their maturation sequence in red bone marrow from nucleated cells known as: | hematopoietic stem cells. |
| The chemoreceptors in the carotid bodies are particularly sensitive to: | hypercapnia. |