Question 1

According to the Centers for Disease Control and Prevention (CDC), approximately 7% of children and

adolescents ages 6 to 19 in the United States have a high total cholesterol. If 120,000 children and adolescents

in that age range were sampled, approximately how many of them would have a normal total cholesterol?

Options :

A : 8,400

B : 113,000

C : 84,000

D : 111,600

Answer: D

Question 2

What is the result of crossing over during meiosis?

Options :

A : Homologous pairs of chromosomes have exchanged segments of their DNA.

B : Non-sister chromatids of homologous pairs of chromosomes have formed a chiasmata.

C : Members of homologous pairs of chromosomes have lined up along the metaphase plate.

D : Homologous pairs of chromosomes have been randomly assorted along the metaphase plate.

Answer: A

Question 3

Which structure works to prevent reflux of gastric contents by contracting and relaxing?

Options :

A : Esophageal muscularis

B : Lower esophageal sphincter

C : Upper esophageal sphincter

D : Angle of His

Answer: B

Question 4

Review the image below.

If each division in the ocular micrometer below equals 25 micrometers, what is the length of the oval?

Options :

A : 100 micrometers

B : 500 micrometers

C : 200 micrometers

D : 400 micrometers

Answer: C

Question 5

Which neuron carries the impulse from a receptor to the central nervous system?

Options :

A : Motor

B : Efferent

C : Association

D : Sensory

Answer: D

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