Characteristics and needs of living things

Nervous and excretory


system
Digestive


system

Muscular system
Skeletal system
100
In what part of the body does most chemical digestion take place?
small intestine
100
• The diaphragm relaxes and moves upward.
What happens to cause air to be exhaled from the lungs?
100
Which component of blood carries oxygen to the body cells?
• plasma • platelets • red blood cells • white blood cells
100
Which type of muscle tires quickly during exercise?
• skeletal muscle
200
What function do the kidneys perform?
• eliminate carbon dioxide • supply oxygen to body cells (your response) • remove urea and excess water • play a role in gas exchange
200
During gas exchange, which substance moves from the alveoli into the blood?
• oxygen (correct answer)
200
Where in the respiratory system does gas exchange occur ?
• in the heart • in the alveoli • in the pharynx • in the trachea (your response)
200
What substance coats and protects the inside of the stomach
? • saliva • pepsin (your response) • mucus • bile
200
Blood vessels that carry blood away from the heart are called
• veins. • arteries. • capillaries. • lymphatic vessels.
300
What structure(s) enable(s) the small intestine to absorb large amounts of nutrients
• villi • pancreas • liver • gallbladder
300
In which vessels are materials exchanged between the blood and the body cells?
• capillaries
300
The function of white blood cells is to
• increase blood pressure. • carry wastes away from body cells. • fight disease.
300
To determine whether a bone is broken, a doctor is most likely to use
• arthroscopy. • MRI. • surgery. • X-ray images.
400
• absorption • peristalsis • mechanical digestion • elimination
What process involves muscle contractions that move food through the esophagus? • absorption • peristalsis • mechanical digestion • elimination
400
What process involves muscle contractions that move food through the esophagus?
• peristalsis
400
Which excretory organ eliminates water and some chemical wastes in perspiration
? • skin (correct answer, your response) • liver • lungs • kidneys
400
The most important laboratory safety rule is to
• use the metic system • wear a lab coat • have a partner • follow directions
400
The green substance found in plant cells used in
• fruiting body • Chlorophyll • rhizoid • bioluminescence
500
The process in which your body breaks down food into small nutrient molecules is called
• enzyme. • peristalsis. • digestion. • absorption. (your response)
500
When blood flows into the right atrium from the body, it contains
• little oxygen and a lot of carbon dioxide
500
What substance in the mouth contains an enzyme that begins chemical digestion
? • fiber • mucus • pepsin • saliva
500
What is the main function of the excretory system?
• to collect and remove wastes from the body
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