Science Systems

Bones are the major part of the body's skeletal system. What is one of the main functions of bones?

• release growth hormones

• provide structure and support

• carry oxygen to the body's cells

• serve as the main source of calcium

Which of the following is an example of voluntary muscle action?

• fingers typing on a keyboard

• pupils dilating in reaction to light

• the heart pumping blood through the body

• the stomach moving food to the intestines

As children grow older, their bones grow too. The growth of the long bones happens in a plate near the end of each bone. What claim states what happens to the cells of cartilage in a growth plate?

• cartilage cells are replaced by bone cells

• cartilage cells lengthen to help stretch out the bone

• cartilage cells expand and become spongy bone cells

• cartilage cells move into spongy bone as bone marrow

When you exercise, your heart rate _____ and your breaths per minute _____.

• increase, increase

• increase, decrease

• decrease, increase

• decrease, decrease

Sharon is working on a report on smooth muscles. Smooth muscles control involuntary body movements. Sharon drew this image to show a magnified view of a smooth muscle. In which of the following body structures would you find smooth muscle?

• lips

• foot

• upper arm

• blood vessels

Which of the following best describes the main function of the circulatory system?

• to deliver nutrients and other materials to cells and remove waste products

• to break down the nutrients found in food so that they can be used by all cells in the body

• to produce the chemical signals that allow parts of the body to communicate over long distances

• to coordinate all other body systems so that they can function together to maintain homeostasis

Which of the following includes two types of cells found in the body?

• platelets and capillaries

• red blood cells and antigens

• red blood cells and capillaries

• white blood cells and platelets

Sonia is studying where oxygen goes in the body. She investigates how oxygen moves from the blood stream into the cells. Based on this evidence which structure is Sonia most likely to examine in this work?

• the veins

• the heart

• the capillaries

• the lymph nodes

Which of the following includes 3 parts of the lymphatic system?

• spleen, lungs, heart

• heart, lymph fluid, spleen

• tonsils, lymph nodes, arteries

• lymphatic ducts, thymus, tonsils

Shawn goes to the doctor because he has a sore throat that has lasted a long time. The doctor tells Shawn that he will have an operation to remove some of the lymphatic tissue at the back of his mouth. Which disorder would you claim is most likely to be the one that Shawn has?

• filariasis

• tonsillitis

• lymphoma

• atherosclerosis