Science 6 Periodical Test: Human Body Systems

Directions: Read each item carefully and choose the letter of the correct answer. Write your answer before each number. Which of the statements correctly describe the general functions of the Skeletal system? I. It gives shape to the body. II. It serves as the framework of the body. III. It protects the internal organs of the body. IV. It converts energy, which enables the body to move.

• I, II, IV

• I, II, III

• II, III, IV

• I, III, IV

Every morning, Zia joins Zumba and jogs around in the park. After her activities, she sweats a lot. Why do you think so? Because of the

• contraction of muscles in the dermis

• relaxation of the muscles in the dermis

• regulation of the body temperature

• excessive movement of the body

How does digestion occur?

• mouth -- esophagus -- stomach -- small intestine -- large intestine -- rectum and anus

• mouth -- stomach -- esophagus -- small intestine -- large intestine -- anus and rectum

• esophagus -- mouth -- large intestine -- small intestine -- anus and rectum

• esophagus -- mouth -- small intestine -- esophagus -- anus and rectum -- large intestine

Which of the following statements best describes the function of the digestive system?

• It releases acids and mixes food.

• It aids in absorption of nutrients from food.

• It carries food from the stomach to the intestine.

• It breaks down food so that the body can absorb food nutrients.

What system is composed of the mouth, esophagus, stomach, small intestine, and large intestine?

• Digestive System

• Respiratory System

• Circulatory System

• Excretory System

When you exhale, how does the diaphragm behave as you breathe out?

• relaxes

• contracts

• sinks

• expands

Why is it important to promote healthful habits for our organs? To

• have a happy personality

• make our organs function properly

• avoid death

• keep our body away from diseases

Striking the tendon on your knee stimulates a sensory neuron in your lower leg that causes your knee to jerk. Why?

• The sensory neuron transmits the nerve impulse to the neuron in the spinal cord.

• The nerve impulse travels directly to the brain, without passing the spinal cord.

• Motor neurons extending to the leg muscles transmit the nerve impulse.

• Nerves in the legs are functioning properly.

How does circulation take place? Trace the flow of blood from the heart to the different parts of the body.

• right atrium → left ventricle → lungs → left atrium → right ventricle → body cells

• right atrium → right ventricle → lungs → left atrium → right ventricle → body cells

• right atrium → left atrium → lungs → left ventricle → left atrium → body cells

• right ventricle → right atrium → lungs → left ventricle → left atrium → body cells

Which of the following statements are TRUE? I. The brain is the center of the nervous system. II. The brainstem is the hind part of the brain III. The largest part of the brain is cerebellum IV. The spinal cord is the downward extension of the brain.

• I and II

• II, III, and IV

• I, II, and IV

• IV only