Podcast
Questions and Answers
What is the result of the local depolarization wave continuing to spread?
What is the result of the local depolarization wave continuing to spread?
- The fiber becomes refractory.
- The permeability of the sarcolemma changes. (correct)
- The axon terminal releases ACh.
- The permeability of the sarcolemma decreases.
What happens to the Na+ channels during repolarization?
What happens to the Na+ channels during repolarization?
- They close. (correct)
- They remain open.
- They become voltage-gated.
- They open further.
What is the function of the Na+K+ pump?
What is the function of the Na+K+ pump?
- To restore the resting polarity of the fiber. (correct)
- To release ACh from the axon terminal.
- To increase the permeability of the sarcolemma.
- To generate an action potential.
What is the state of the fiber during the refractory period?
What is the state of the fiber during the refractory period?
What occurs during local depolarization?
What occurs during local depolarization?
What is the result of K+ efflux during repolarization?
What is the result of K+ efflux during repolarization?
At which stage do Na+ channels close and K+ channels open?
At which stage do Na+ channels close and K+ channels open?
What occurs during the latent period?
What occurs during the latent period?
What is the number of polypeptide chains in a hemoglobin molecule?
What is the number of polypeptide chains in a hemoglobin molecule?
What type of channels are open during the generation of the end plate potential?
What type of channels are open during the generation of the end plate potential?
What is the sequence of events that leads to muscle contraction?
What is the sequence of events that leads to muscle contraction?
What is the function of the heme group in hemoglobin?
What is the function of the heme group in hemoglobin?
What is the role of ACh in the sequence of events?
What is the role of ACh in the sequence of events?
What is the name of the process by which blood cells are formed?
What is the name of the process by which blood cells are formed?
Where does hematopoiesis occur in the body?
Where does hematopoiesis occur in the body?
What is the overall effect of the sequence of events?
What is the overall effect of the sequence of events?
What is the name of the cells that give rise to all formed elements in the blood?
What is the name of the cells that give rise to all formed elements in the blood?
What is the space between the axon terminal and the muscle fiber called?
What is the space between the axon terminal and the muscle fiber called?
What percentage of CO2 is carried in the blood by carbaminohemoglobin?
What percentage of CO2 is carried in the blood by carbaminohemoglobin?
What is the role of voltage-gated Ca2+ channels in the neuromuscular junction?
What is the role of voltage-gated Ca2+ channels in the neuromuscular junction?
What is the function of acetylcholinesterase in the neuromuscular junction?
What is the function of acetylcholinesterase in the neuromuscular junction?
What is the type of channel that allows simultaneous passage of Na+ into the muscle fiber and K+ out of the muscle fiber?
What is the type of channel that allows simultaneous passage of Na+ into the muscle fiber and K+ out of the muscle fiber?
What is the purpose of the action potential arriving at the axon terminal?
What is the purpose of the action potential arriving at the axon terminal?
What is the location of the ACh receptors in the neuromuscular junction?
What is the location of the ACh receptors in the neuromuscular junction?
What is the normal stimulus for the homeostatic response to increase oxygen-carrying ability in the blood?
What is the normal stimulus for the homeostatic response to increase oxygen-carrying ability in the blood?
What is the role of the kidney in the homeostatic response to hypoxia?
What is the role of the kidney in the homeostatic response to hypoxia?
What is the average lifespan of a red blood cell?
What is the average lifespan of a red blood cell?
What happens to the heme part of hemoglobin when it is degraded?
What happens to the heme part of hemoglobin when it is degraded?
What is the final destination of the broken-down bilirubin in the body?
What is the final destination of the broken-down bilirubin in the body?
What is the fate of the globin part of hemoglobin when it is degraded?
What is the fate of the globin part of hemoglobin when it is degraded?