EmSAT EmSAT Biology 4

Question 1

What is the function of the heart?

Accepted Answer

To pump blood through the circulatory system

Answer

The heart is a muscular pump that circulates blood throughout the body. It delivers oxygen and nutrients to tissues and removes waste products via the circulatory system.

Question 2

What is the role of red blood cells?

Accepted Answer

Transporting oxygen via hemoglobin

Answer

Red blood cells (erythrocytes) transport oxygen from the lungs to body tissues using the protein hemoglobin. They also carry CO₂ back to the lungs for exhalation.

Question 3

Where does gas exchange occur in the lungs?

Accepted Answer

Alveoli

Answer

Gas exchange (O₂ into blood, CO₂ out of blood) occurs in the alveoli, tiny air sacs in the lungs. Their large surface area and thin walls make them ideal for efficient diffusion.

Question 4

What is the role of the liver?

Accepted Answer

Filtering blood, producing bile, and metabolizing nutrients

Answer

The liver performs over 500 functions including filtering toxins from blood, producing bile for digestion, metabolizing carbohydrates/proteins/fats, and synthesizing blood clotting proteins.

Question 5

Which part of the nervous system controls voluntary movement?

Accepted Answer

Somatic nervous system

Answer

The somatic nervous system controls voluntary movements of skeletal muscles. The autonomic nervous system controls involuntary functions like heart rate and digestion.

EmSAT Practice Test

EmSAT Practice Test

EmSAT EmSAT Biology 4