In: Anatomy and Physiology
Explain how an action potential when fired spreads to the rest of the axon.
Why does the action potential spread in only one direction (toward the axon terminal)?
Explain why action potentials are conducted more quickly and effectively (in terms of energy used) in myelinated cells than in unmyelinated cells.
In: Anatomy and Physiology
In: Anatomy and Physiology
What does the term "action" mean when it comes to skeletal muscle contraction? Choose a muscle and provide an explanation of its action.
In: Anatomy and Physiology
In: Anatomy and Physiology
In: Anatomy and Physiology
what does myelomeningocele mean? what are the consequences?
In: Anatomy and Physiology
What happens with blockage of fast sodium channels? Am I correct to say that it increases refractory period as phase 0 of fast AP is delayed? Does this mean a decrease in heart rate due to decrease in rate of contractility from decreased spread of depolarization?
In: Anatomy and Physiology
During natural disasters like hurricanes when the community is living in shelters, why would there be a concern about a tuberculosis outbreak? what circumstances have led to the spread of drug resistant tuberculosis? Mary, a nurse, skin test was positive for tuberculosis. Does this mean she has tuberculosis? explain
In: Anatomy and Physiology
What does it mean to say a membrane channel is selective? What does it mean when we say a membrane channel is gated? Describe two different types of membrane gated channels and explain why we do not always want them open.
In: Anatomy and Physiology
What is pancreatitis and what are some causes of this condition? Briefly outline the endocrine and exocrine functions of the pancreas
In: Anatomy and Physiology
“Like a polio ward from the 1950s” is how Guy McKhann, M.D., a neurology specialist at John Hopkins School of Medicine, describes a ward of Beijing Hospital that he visited on a trip to China in 1986. Dozens of paralyzed children---some attached to respirators to assist their breathing--filled the ward to overflowing. The chinese doctors thought the children had Guillain-Barre syndrome (GBS), a rare paralytic condition, but Dr. McKhann wasn’t convinced. There were simply too many stricken children for the illness to be the rate Guillain-Barre syndrome. Was it polio--as some of the Beijing staff feared? Or was it another illness, perhaps one that had not yet been discovered? Guillain-Barre syndrome is a relatively rare paralytic condition that strikes after a viral infection or an immunization. There is no cure, but usually the paralysis slowly disappears, and lost sensation slowly returns as the body repairs itself. In classic Guillain-Barre, patients can neither feel sensations nor move their muscles.
Is the paralytic illness that affected the chinese children a demyelinating condition? Why or why not?
In: Anatomy and Physiology
1)what is the inflammatory digestive system condition
that is common in adolescence ? What events leads to this
condition?
2)what is the digestive system condition that can result from a
fiber poor diet ? what inflammatory condition can this lead to? how
do the symbols of this condition manifest ?
In: Anatomy and Physiology
Georgina has recently gone to her primary care provider for her annual physical. As part of routine examination a vision exam is given. Georgina has always had perfect vision but is having some difficulty with this test today. Upon further questioning, the medical assistant learns that Georgina has been experiencing blurred vision for quite some time and often sees what she describes as rings when she is near bright light. On physical examination the provider also notices a cloudy appearance to Georgina’s corneas.
What condition is Georgina likely experiencing?
What treatment options are available for the diagnosis you chose?
What is Georgina’s prognosis for a full recovery given the different treatment options you discussed?
In: Anatomy and Physiology