2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1 pt Skeleton and Muscles Respiratory and Circulatory Systems Nervous and Digestive Systems Mixed Questions

Different tissues that work together are called,….

organs

Cells of the same type work together to form,….

Tissue

What do we call the point at which bones meet?

joints

What muscle squeezes and relaxes without ever stopping?

Cardiac muscle

Explain why smooth muscle cannot take the place of skeletal muscle.

Smooth muscle cannot take the place of skeletal muscle because: You cannot control smooth muscles. The fibers in smooth muscles are too short. Smooth muscles can push and pull, but skeletal muscles are only supposed to pull.

The tiny blood vessels that surround air sacs are called,…

capillaries

To pass from the heart to the rest of the body, oxygen-rich blood passes through the,…..

arteries

The heart has four sections called,….

chambers

Describe what the veins do.

Veins carry oxygen-poor blood and the waste product of cells (carbon-dioxide) back to the heart and lungs. (so the body can get rid of CO2 and so the blood can get more oxygen)

How does exercise help the circulatory system? (heart, arteries, veins)

The heart is a muscle, so if it gets exercise it gets stronger. If it’s stronger it can push blood out and take blood in more easily.

The tube of nerves that runs through your backbone is called,….

The spinal cord

What is the special name for nerve cells?

neuron

What softens food and starts the digestion process before the stomach?

saliva

What body system provides nutrients to your body?

The digestive system

Describe the purpose or job of the small intestine. Why is this organ so important?

The small intestine continues to break down food into very small particles after it leaves the stomach. This is important because food particles must be extremely small so that they can enter the cells.

Name the parts of the small intestine where nutrients enter the blood.

villi

Name the tube that leads from the kidneys to the ureters.

nephrons

Compare ligaments to tendons.

Both attach parts of the body to each other, but ligaments attach bone to bone. Tendons attach bone to muscle.

Explain how you are able to pull your hand away from a hot stove burner before the pain message gets to your brain.

When the pain signal from the skin receptor reaches the spinal cord, the nerve in the spinal cord sends the signal directly to a nerve in the muscle to move the hand away. This happens before another signal from the spinal cord reaches your brain. So you don’t need to think about moving your arm.

Explain how signals travel from neuron to neuron in the nervous system.

1. An electrical signal travels through a dendrite and into a neuron. 2. This signal triggers the neuron to make chemicals. 3. That neuron then sends the chemicals out through its axon and across the synapse to the dendrites of the next neuron. 4. These chemicals trigger an electrical signal to be sent through this neuron and the whole process starts over.