Science Assessment III.2 - 11°

The liver removes ammonia from the blood and converts it into urea. Why is this activity of the liver an example of homeostasis?

• The activity is independent of blood levels of ammonia, and has no effect on the levels.

• The activity keeps blood levels of ammonia within a certain low range that the body can tolerate.

• The activity occurs only during the day, when the body is most active.

• The activity occurs only at night, when other body organs are at rest.

The circulatory system consists of the heart and many blood vessels. Which identifies an example of a tissue that is part of the circulatory system?

• the heart

• a capillary in the lung and adjacent alveoli, which are parts of the lung

• a group of muscle cells in the heart that work together

• the set of all of the capillaries in the lungs

Organ systems of the human body include the circulatory, respiratory, digestive, nervous, muscular, and skeletal systems, along with several others. What best describes the relationships among these systems?

• Each system functions independently of the other systems.

• Each system depends on the function of one or two other systems at the most.

• Each system generally depends on the functions of a few other systems, but sometimes functions independently.

• Each system depends on the functions of the other systems, and could never function independently.

Bruco is developing a model of the human circulatory system. Which sequence of blood flow should the model show?

• right side of heart -> lungs -> left side of heart -> all body systems except the lungs

• right side of heart -> all body systems -> left side of heart

• left side of heart -> all body systems -> right side of heart

• left side of heart -> lungs -> all other body systems -> right side of heart

Yasmine uses the model of a double pump to describe the human heart. Which statement about the human heart explains why Yasmine’s model is reasonable?

• The heart has two chambers: one chamber for receiving blood and one chamber for pumping blood.

• The heart has four chambers divided into two sides: one side for receiving blood and one side for pumping blood.

• The heart has four chambers divided into two sides: one side for pumping blood to the lungs, and one side for pumping blood to the rest of the body.

• The heart has two pairs of equal-sized chambers, and each pair pumps blood to approximately half of the body.

The human nervous system is made of a huge number of interconnected neurons. The two main divisions of the nervous system are the central nervous system (CNS) and the peripheral nervous system (PNS). Which describes a common pathway of nerve impulses through the divisions of the nervous system?

• CNS → sensory neurons of the PNS → motor neurons of the PNS

• sensory neurons of the PNS → CNS → motor neurons of the PNS

• sensory neurons of the PNS → motor neurons of the PNS → CNS

• motor neurons of the PNS → CNS → sensory neurons of the PNS

Which of the following is the correct order, from simplest to most complex, for the levels of organization in the human body?

• Organ systems, tissues, organs, cells.

• Cells, tissues, organs, organ systems.

• Organ systems, organs, tissues, cells

• Cells, organs, organ systems, tissue

What are the components of blood?

• Plasma, red blood cells, white blood cells, and platelets.

• Plasma, oxygen, carbon dioxide, and platelets.

• Erythrocytes, leukocytes, and platelets.

• Plasma, erythrocytes, red blood cells, and platelets.

Which division of the nervous system speeds up your heart rate?

• Somatic

• Autonomic

• Central

• Brain and spinal cord

________ is a neurological disorder that usually attacks in old people with the symptoms of loss memory.

• Parkinsons

• Alzheimer

• A stroke

• Amnesia