Describe the structure of haemoglobin and the molecular changes that occur in the molecule when it releases oxygen.

(12 marks, plz try to detail)

Thx.

How do changes in capital structure affect a firm's value?

The movement of molecular motors depends on the conformational changes that the proteins undergo as they proceed through the cycle of nucleotide binding, hydrolysis, and release. If you were to add a nonhydrolyzable form of ATP to myosin, at what point would you block its movement? How is this similar to or different from adding a nonhydrolyzable form of ATP to kinesin?

. a) In each of the following changes indicate which are age related and which are age associated changes and age associated diseases. Us abbr AR,AS, ASD. b) Also indicate under each if the degree of age related changes could become age associated under the influence of life style ( indicate by yes if it can or no it does not)

a. Reduced sex drive in females

b. wrinkling of skin

c. acute dementia

d. impotent in males

c. hypertension

d. presbyopia

e. Ectropion

f. vascular dementia

g. bone loss in females

h. bone loss in males

i. hypothermia

j. osteoarthritis

m. ADRs to medication

n. loss of muscle mass

o. Parkinson’s diseases

p. reduced short-term memory

q. multi-infarction dementia

r. incontinence

s. dysphagia

t. reduced time between erection (males)

2. a) explain which of the theories of aging explains the following age related changes, b) indicate if each theory is extrinsic or intrinsic

a. loss of elasticity of lungs reducing vital capacity

b. The loss of functional cells to replace those that are dying or damage

c. decrease in bone density

d. arteriosclerosis

e. osteoporosis - female

f. arthritis

3. Explain, from question 2 above, if these theories totally explain aging.

The editor of the student newspaper was in the process of making some major changes in the newspaper’s layout. He was also contemplat- ing changing the typeface of the print used. To help himself make a decision, he set up an experiment in which 20 individuals were asked to read four newspaper pages, with each page printed in a dif- ferent typeface. If the reading speed differed, then the typeface that was read fastest would be used. However, if there was not enough evidence to allow the editor to conclude that such differences existed, the current typeface would be continued. The times (in seconds) to completely read one page were recorded. What should the editor do?

Describe the histology of the urinary tract and how that changes between the ureter and the renal tubules.

Enzymes are generally proteins. Proteins are sensitive to extreme changes in their environment and if they lose their structure, (are denatured), do not function properly anymore. The metabolism reactions that keep a human organism alive is driven and supported by countless enzymes. What then, is the risk of a person running a high fever for a prolonged period of time?

Describe the histology of the respiratory tract and how that changes between the trachea and the alveoli.

How would a drug that is a bronchodilator cause changes to A) areas of the conducting zone, and B) respiratory zone performance