ADAT ADAT Biomedical Sciences 2

Question 1

Which structure connects the two cerebral hemispheres and allows interhemispheric communication?

Accepted Answer

Corpus callosum

Answer

The corpus callosum is the large band of white matter fibers linking the left and right cerebral hemispheres.

Question 2

During the citric acid cycle, which molecule is directly regenerated to allow the cycle to continue?

Accepted Answer

Oxaloacetate

Answer

Oxaloacetate combines with acetyl-CoA to form citrate and is regenerated at the end of each cycle turn.

Question 3

Which type of epithelium lines the alveoli of the lungs to permit efficient gas exchange?

Accepted Answer

Simple squamous epithelium

Answer

Simple squamous epithelium is thin and flat, minimizing diffusion distance for gases.

Question 4

A patient with a deficiency in factor VIII would most likely present with which condition?

Accepted Answer

Hemophilia A

Answer

Factor VIII deficiency is the classic cause of hemophilia A, an X-linked bleeding disorder.

Question 5

Which hormone secreted by the posterior pituitary promotes water reabsorption in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Answer

ADH (vasopressin) increases water permeability of the collecting ducts, conserving water.

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