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block

13319 – Na -K activated adenosine triphosphatase 

Select the correct answer(s).  

(0/0)

---

A. exchanges two Na ions for three K ions

E. is bound to the drug ouabain at an intracellular site 

B. activity leads to depolarisation of the cell +

D. is made up of one alpha and two beta subunits

C. activity increases when the intracellular Na concentration rises 

none

25728 – Concerning the metabolic effects of starvation in the postoperative period 

Select the correct answer(s).  

(0/0)

---

A. glycogen storage in the liver provides a source of glucose for several days

E. glycogen levels fall and insulin levels rise 

B. fatty acids provide the main metabolic fuel 

D. visceral protein is preserved

C. thyroxine conversion plays little role

none

952 – The most clinically useful form of nutritional assessment related to body weight is: 

Select the correct answer(s).  

(0/0)

---

D. A history of unintentional weight loss greater than 10% over the preceeding 6 months. 

C. Body mass index (BMI: weight divided by the square of height).

E. Body composition measurement using neutron activation. 

B. A 72-hour dietary recall history.

A. Absolute weight measured on an accurate set of scales.

none

13279 – Which of the following increases blood glucose, mobilises fat from depots and has no effect on protein synthesis? 

Select the correct answer(s).  

(0/0)

---

B. glucagon

C. adrenaline 

D. cortisol

E. growth hormone 

A. insulin

none

9850 – A patient suffers from a metabolic acidosis due to excessive production of keto-acids. In this state all of the following are true EXCEPT 

Select the correct answer(s).  

(0/0)

---

A. urinary NH4 excretion is increased

E. there is an increase in the rate of production of bicarbonate 

B. there is decreased PCO2 of the arterial blood

C. the renal excretion of titratable acid is increased

D. there is a decrease in the intracellular H+ concentration 

none

14918 – S:Vasodilatation, hypovolaemia and oedema are prominent features of anaphylaxis because R:the antigen antibody reaction in anaphylaxis releases 5-hydroxytryptamine which causes increased capillary permeability and widespread vasodilatation 

Select the correct answer(s).  

(0/0)

---

Both S and R are false

S is true, R is true but not a valid explanation of S 

S is true and R is false 

S is true, R is true and a valid explanation of S

S is false and R is true

none

20553 – S. Bicarbonate is the most important buffer in the extra-cellular fluid BECAUSE R. buffers work most effectively near their pK 

Select the correct answer(s).  

(0/0)

---

S is true, R is true and a valid explanation of S 

S is true and R is false

S is false and R is true

Both S and R are false

S is true, R is true but not a valid explanation of S 

none

18958 – Gap junctions of cells 

Select the correct answer(s).  

(0/0)

---

B. characteristically surround apical margins of epithelial cells

C. endow tissues with stability and strength

A. are spanned by corresponding connexons 

E. are made up of ridges from adjacent cells 

D. maintain cell polarity

none

13273 – The primary physiological action of insulin is to increase 

Select the correct answer(s).  

(0/0)

---

E. protein synthesis 

C. glucose uptake by the brain

B. lipid synthesis by the liver and fat depots

D. glucose uptake by the muscles 

A. glycogen synthesis by the liver

none

12530 – The most important buffer base in the extracellular fluid is 

Select the correct answer(s).  

(0/0)

---

D. haemoglobin

B. phosphate

E. lactate 

A. plasma protein

C. bicarbonate 

none

20421 – S. Scurvy is associated with blood vessel fragility BECAUSE R. ascorbic acid is an essential cofactor for the synthesis of collagen 

Select the correct answer(s).  

(0/0)

---

S is true, R is true but not a valid explanation of S

S is true, R is true and a valid explanation of S 

S is true and R is false

Both S and R are false 

S is false and R is true

none

958 – Which of the following statements about anthropometric measurements, such as triceps skinfold thickness and midarm circumference, best describes their clinical role: 

Select the correct answer(s).  

(0/0)

---

C. Simple measurements that lack reliability, but are very precise.

B. Values below the 5th percentile are associated with a poor clinical outcome. 

A. Simple measurements that are highly reliable.

D. Such measures cannot be used to estimate muscle mass.

E. Useful ward-based tests that should be employed by nutrition support teams. 

none

19306 – Which of the following statements about Na+ -K+ activated adenosine triphosphatase is correct? 

Select the correct answer(s).  

(0/0)

---

D. the enzyme is made up of one alpha and two beta subunits

B. the activity of this enzyme leads to depolarization of the cell

E. the drug ouabain binds to the enzyme at an intracellular site 

A. this enzyme exchanges 2 Na+ ions for 3 K+ ions

C. the activity of this enzyme increases when the intra-cellular Na+ concentration rises 

none

0397 – S. Intracellular oedema may occur in areas where local blood flow is depressed BECAUSE R. inadequate oxygenation depresses cell membrane ionic pumps and allows sodium to leak into cells 

Select the correct answer(s).  

(0/0)

---

S is true, R is true and a valid explanation of S 

S is true, R is true but not a valid explanation of S

S is true and R is false

S is false and R is true

Both S and R are false 

none

25770 – Metabolic responses to fasting include all of the following EXCEPT 

Select the correct answer(s).  

(0/0)

---

C. muscle and visceral protein catabolism

A. hepatic gluconeogenesis

B. hepatic glycogenolysis

E. ketogenesis 

D. falling glucagon levels