TEAS Science Practice Test #3 2

Question 1

Which type of muscle tissue is found in the walls of the digestive tract and blood vessels?

Accepted Answer

Smooth muscle

Answer

Smooth muscle is involuntary and non-striated, found in hollow organs like the intestines, stomach, bladder, and blood vessel walls. Cardiac muscle is found only in the heart, and skeletal muscle is responsible for voluntary movement.

Question 2

What is the purpose of meiosis in human reproduction?

Accepted Answer

To produce gametes (sperm and egg cells) with half the normal chromosome number

Answer

Meiosis is a type of cell division that produces four genetically unique gametes (sperm or egg cells), each with half the chromosome number (haploid, n=23) of the parent cell. When fertilization occurs, the full number (diploid, 2n=46) is restored.

Question 3

Which of the following best describes the function of the lymphatic system?

Accepted Answer

To return excess interstitial fluid to the bloodstream and support immune defense

Answer

The lymphatic system collects excess fluid from tissues (lymph), returns it to the bloodstream, and houses lymphocytes and other immune cells. Lymph nodes filter pathogens and debris from lymph fluid.

Question 4

In the scientific method, what is a "hypothesis"?

Accepted Answer

A testable, falsifiable prediction about the outcome of an experiment

Answer

A hypothesis is a tentative, testable explanation or prediction for an observed phenomenon. It must be falsifiable — meaning it can be proven wrong through experimentation. It is not a proven fact but a starting point for investigation.

Question 5

Which element has the atomic number 8?

Accepted Answer

Oxygen

Answer

Atomic number refers to the number of protons in an atom's nucleus. Oxygen (O) has 8 protons, making it element number 8 on the periodic table. Carbon is 6, Nitrogen is 7, and Fluorine is 9.

TEAS Practice Test

TEAS Practice Test

TEAS Science Practice Test #3 2