TEAS Science Practice Test 3

Question 1

Which of the following correctly traces the path of blood through the heart?

Accepted Answer

Right atrium → right ventricle → pulmonary artery → lungs → pulmonary veins → left atrium → left ventricle → aorta

Answer

Deoxygenated blood enters the right atrium, moves to the right ventricle, is pumped to the lungs via the pulmonary artery, returns oxygenated via pulmonary veins to the left atrium, then left ventricle, and out through the aorta.

Question 2

A solution with a pH of 2 is how many times more acidic than a solution with a pH of 4?

Accepted Answer

100 times

Answer

The pH scale is logarithmic. Each unit represents a tenfold difference, so a difference of 2 pH units means 10² = 100 times more acidic.

Question 3

Which macromolecule serves as the primary long-term energy storage in humans?

Accepted Answer

Lipids (fats)

Answer

Lipids (triglycerides/fats) are the primary long-term energy storage molecules in the human body, providing 9 calories per gram compared to 4 for carbohydrates and proteins.

Question 4

Which organ is primarily responsible for filtering blood, removing waste products, and maintaining fluid and electrolyte balance?

Accepted Answer

Kidneys

Answer

The kidneys filter approximately 180 liters of blood daily, removing waste products as urine while regulating fluid volume, electrolyte concentrations, and acid-base balance.

Question 5

In genetics, if a trait is autosomal recessive, what must be true for an individual to express that trait?

Accepted Answer

They must have two copies of the recessive allele (be homozygous recessive)

Answer

Autosomal recessive traits are only expressed when an individual inherits two copies of the recessive allele (one from each parent), making them homozygous recessive.

TEAS Practice Test

TEAS Practice Test

TEAS Science Practice Test 3