Answer the following:
Describe the mechanisms by which acetylcholine affects heart rate.
Describe the mechanisms by which epinephrine affects heart rate.
Describe the mechanisms by which atropine followed by acetylcholine affects heart rate.
Epinephrine mimics the effects of which branch of the autonomic nervous system?
Compare the effect of acetylcholine on cardiac muscle with its effect on skeletal muscle. Can you explain the mechanistic basis for the difference?
In: Anatomy and Physiology
a) hyponatraemia occurs when serum sodium levels drop too much. Why do you think drinking
deionized water would result in low blood sodium levels?
b) What could have the individual added to her water to prevent this from happening, and why
would this have prevented hyponatraemia? Incorporate your knowledge of concentration
gradients and diffusion.
c) Over-hydration can be treated if caught in its early stages. What do you think would be the
quickest way to restore the patient's serum sodium levels?
In: Anatomy and Physiology
Gene Matson, a 75-year old male, was brought to the hospital by his son following the acute onset of left-side numbness and weakness that began one hour prior to admission. His son stated that two weeks prior to admission Gene had a single, 12-hour episode of garbled speech and left-side and arm weakness. Following the first episode, the right carotid angiogram was performed and showed a narrowing of the carotid at about mid-way.
Questions: 1. What abnormality does the angiogram show? What kind
of lesion a "narrowing" may represent? 2. Relate the findings in
the angiogram to the patient's past and present neurological
problems in terms of: a. How the vascular lesion could lead to
neurological problems. b. What specific blood vessel in the brain
must have been affected by the process "a" to account for his
symptoms.
Past medical history of Mr. Matson: The patient has a history of
moderate hypertension treated with calcium channel blockers.
History of hypercholesterolemia also. Mr. Matson smoked one pack of
cigarettes per day for forty years, and drank approximately four
beers per day for severe years.
Physical Exam: Temperature: 37 degrees Celsius Pulse 72 Respiration
rate: 12 Blood pressure 170/100
Neurological exam: Showed left-sided hemiplegia (paralysis on one
side) and hemianesthesia (numbness on one side)
Questions:
1. What are pertinent aspects of the patient's past medical history that are risk factors for his current medical problem?
2. Damage to which lob(s) accounts for the patient's sensory and motor deficits?
3. Give an explanation for why the damage tot he right side of the brain may cause sensory and motor problems on the contralateral (opposite) side of the body.
4. Is there a surgical procedure that might have prevented the current episode? if so, what is the procedure called?
In: Anatomy and Physiology
What are the external anatomical structures of the male reproductive system? What are their primary functions?
In: Anatomy and Physiology
300 words explain: Disorders of the large intestine What is one example of a disorder that can effect the large intestine? What effect does the disorder have on the large intestine? Can the disorder be prevented? Why or why not?
In: Anatomy and Physiology
Vaccines and pathogens have different intended consequences, yet they elicit similar physiological changes in the individual. How does the body respond if both events happen concurrently in an individual?
In: Anatomy and Physiology
Your task is to discuss how does the immune system utilizes the cardiovascular and lymphatic systems to defend the host against invasion of pathogens. 1. An individual finds himself infected by a previously undiscovered pathogen, Transmissio. A.What is the body’s initial response and long term effects?
In: Anatomy and Physiology
1i.) What is the hepatic response to malnutrition or fasting?
ii.) What are the consequence of malnutrition and/or fasting?
Past paper question
In: Anatomy and Physiology
1.The sympathetic nervous system will do the following except:
a)increase vasodilation in the blood vessels in skeletal
muscle
b)increase vasoconstriction in the skin
c)increase vasodilation in the blood vessels in the kidneys
d)increase vasodilation in the blood vessels in cardiac
muscles
2.Parasympathetic acetylcholine opens Ca2+channels when
regulating hearts.
a)True
b)False
3.Essential hypertension could result from the following
except
a)kidney disease resulting in decreased urine production
b)increased salt uptake with reduced ability of kidneys to
filter
c)increased sympathetic nerve activity
d)increased total peripheral resistance
4)Oncotic pressure normally helps to draw fluid
into
a)interstitial fund
b)venous ends of capillaries
c)arterial ends of capillaries
In: Anatomy and Physiology
Differentiate between oligodendrocytes and Schwann Cells
What is the role of calcium in neurotransmitter release?
In: Anatomy and Physiology
Adults with severe anemia will sometimes have yellow marrow convert back to red marrow. What kind of feedback is this and how do you know?
In: Anatomy and Physiology
3.sometimes we use them interchangeably but they really are two very different things - salt and sodium. Explain their differences and their impacts on health and particularly hydration and fluid status.
4.What does potassium do and where do we get it?
In: Anatomy and Physiology
Please use this discussion to explain Glycolysis how you understand it.
In: Anatomy and Physiology
Create a table of the different classes of neurotransmitters. List names of neurotransmitters, their implications in human disease, and their main functions .
In: Anatomy and Physiology
What is a suggested pathological outcome of increased high fructose corn syrup consumption and what is the potential biochemical mechanism? Please detail the metabolism of this nutrient.
In: Anatomy and Physiology