BHS Anatomy and Physiology 5

Question 1

The countercurrent multiplier system in the kidney is located in the:

Accepted Answer

Loop of Henle

Answer

The loop of Henle creates a hyperosmotic medullary gradient through the countercurrent multiplier mechanism, enabling urine concentration.

Question 2

Which type of cell junction prevents molecules from passing between adjacent epithelial cells?

Accepted Answer

Tight junctions

Answer

Tight junctions (zonula occludens) seal adjacent epithelial cells together, preventing paracellular movement of substances.

Question 3

The Frank-Starling law of the heart states that:

Accepted Answer

Stroke volume increases as ventricular end-diastolic volume increases

Answer

The Frank-Starling law states that the greater the stretch of the ventricular myocardium (preload), the greater the force of contraction and stroke volume.

Question 4

Which structure in the inner ear is responsible for detecting linear acceleration and gravity?

Accepted Answer

Otolithic organs (utricle and saccule)

Answer

The utricle and saccule contain otolithic membranes with calcium carbonate crystals (otoliths) that detect linear acceleration and head tilt.

Question 5

The primary function of the large intestine is:

Accepted Answer

Water and electrolyte absorption

Answer

The large intestine primarily absorbs water and electrolytes from indigestible food matter and compacts feces for elimination.

BHS - Bachelor of Health Science Practice Test

BHS - Bachelor of Health Science Practice Test

BHS Anatomy and Physiology 5