Which type of cellular transport involves the move

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Question 1 of 5

Which type of cellular transport involves the movement of ions or molecules with the help of carrier proteins?

A. Osmosis B. Active transport C. Simple diffusion D. Exocytosis

Correct Answer: B

Rationale: Active transport uses carrier proteins and energy.

Question 2 of 5

Monocytes

A. Originate from precursor cells in lymph nodes. B. Can increase in number when their parent cells are stimulated by factors released from activated lymphocytes. C. Unlike granulocytes, do not migrate across capillary walls. D. Can transform into large multinucleated cells in certain chronic infections.

Correct Answer: B

Rationale: Monocytes arise from bone marrow, increase via cytokine stimulation from lymphocytes, and can become multinucleated giant cells in chronic infections.

Question 3 of 5

The pH

A. Of arterial blood normally ranges from 7.35 to 7.45. B. Units express left H^ + \right in moles/litre. C. Of blood is directly proportional to theP_CO_2. D. Of blood is directly proportional to left HCO _3 ^ - \right .

Correct Answer: A

Rationale: Normal arterial pH is 7.35-7.45; urine pH is typically acidic (<7) to excrete H+.

Question 4 of 5

Excessive tissue fluid (oedema) in the legs may

A. Be associated with a raised extracellular fluid volume. B. Result from hepatic disease. C. Result from blockage of pelvic lymphatics. D. Increase local interstitial fluid pressure.

Correct Answer: A

Rationale: Oedema is an increase in the interstitial component of ECF.

Question 5 of 5

In investigating a patient's acid-base status

A. Venous rather than arterial blood should be studied. B. Blood samples may be stored for up to 12 hours at room temperature before analysis. C. pH can be calculated if left[HCO3- \right] and PCO2 are known. D. Raised urinary ammonium salts suggest renal compensation for respiratory acidosis.

Correct Answer: C

Rationale: pH is calculated via Henderson-Hasselbalch: pH = 6.1 + log([HCO3-]/0.03*PCO2).

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Which type of cellular transport involves the movement of ions or molecules with the help of carrier proteins?

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