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Which of these stages in digestion is classified as a physical change?
A. Large drops of fat are emulsified into small drops of fat.
B. Complex carbohydrates are converted to galactose.
C. Lactose is converted to glucose and galactose.
D. Protein is broken down into amino acids.
A. Large drops of fat are emulsified into small drops of fat.
Kendall studied the ways in which human body systems work together. He compared the respiratory and circulatory systems. In which way are these two systems similar to each other?
A. They both bring oxygen to the body.
B. They both send messages to the body.
C. They both digest nutrients for the body.
D. They both pump blood through the body.
B. They both send messages to the body.
The body’s response to a viral infection is to
A. send more blood through the kidneys to filter out the virus.
B. increase the secretion of enzymes to digest the virus.
C. produce additional white blood cells to kill the virus.
D. increase fluid intake to flush the virus out.
C. produce additional white blood cells to kill the virus.
How do muscles and bones work together to create body movement?
A. The muscles pull on the bones.
B. The muscles protect the bones.
C. Muscles grow at the same rate as bones.
D. Muscles send electrical impulses to bones.
A. The muscles pull on the bones.
One system of the human body works along with the skeletal system by assisting movement and maintaining posture. Which system is being described?
A. respiratory
B. circulatory
C. muscular
D. digestive
C. muscular
What part of the body receives information from the senses?
A. heart
B. brain
C. lungs
D. stomach
B. brain
Toxic chemicals in mobile phone batteries can pollute the environment when the phones are thrown away in unlined landfills. Which of the following BEST explains why people continue to use mobile phones even though the phones can have a negative impact on the environment?
A. Mobile phones are less expensive than phones with cords.
B. Mobile phones cause people to become distracted.
C. Mobile phones cause less environmental damage than other electronic products.
D. Mobile phones make communication more convenient.
D. Mobile phones make communication more convenient.
Which action BEST models the motion of an arm at the elbow joint?
A. opening a drawer
B. slicing an apple
C. closing a car door
D. pushing a wheelbarrow
C. closing a car door
The Coriolis effect deflects wind direction. How does this process impact ocean surface currents?
A. The wind deflects the currents to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
B. The wind deflects the currents to the left in the Northern Hemisphere and to the right in the Southern Hemisphere.
C. The wind deflects the currents to the left in both hemispheres.
D. The wind deflects the currents to the right in both hemispheres.
A. The wind deflects the currents to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
Which of these is accomplished by the interaction of haploid cells in sexually reproducing organisms?
A. production of a zygote with a complete set of chromosomes with genetic material from two parents
B. production of offspring with identical chromosomal combinations from both parents
C. elimination of genes that selection pressures are acting against
D. deletion of genetic material that has mutated
A. production of a zygote with a complete set of chromosomes with genetic material from two parents
Which statement describes how muscles work to allow a person to extend an arm from a curled position by straightening the elbow?
A. Both the biceps and triceps contract.
B. Both the biceps and the triceps relax.
C. The triceps contract and the biceps relax.
D. The biceps contract and the triceps relax.
C. The triceps contract and the biceps relax
Which type of activity would MOST likely be included on a weather map?
A. satellite
B. seismic
C. volcanic
D. hurricane
D. hurricane
The nucleus of the cell controls cell activity. Which body system performs a similar function in humans?
A. circulatory system
B. central nervous system
C. skeletal system
D. integumentary system
B. central nervous system
During digestion, fructose is produced by the breakdown of larger molecules. Which type of molecule could be broken down to increase the body’s fructose levels?
A. proteins
B. vitamins
C. triglycerides
D. carbohydrates
D. carbohydrates
Which condition is associated with MOST warm fronts?
A. tornado formations
B. low temperatures
C. violent air mass collisions
D. cloud formations bringing precipitation
D. cloud formations bringing precipitation
Sean felt the room become cooler. His body adjusts to enable him to survive. Which response did Sean have that enabled his body to continue to function correctly?
A. an increase in cellular respiration which increases heat production
B. sweating from the skin to lower inner heat levels
C. opening of the capillaries in the skin to obtain more heat
D. an increase in the metabolism which decreases heat from cells
A. an increase in cellular respiration which increases heat production
Which body system is responsible for breaking down food into molecules that it absorbs?
A. digestive
B. circulatory
C. respiratory
D. lymphatic
A. digestive
In the United States, lightning occurs most often in Florida. Which of these is a cause of lightning?
A. discharge between rain clouds and Earth
B. rapidly expanding air caused by intense heat
C. solar particles interacting with the atmosphere
D. low slanting rays of the Sun refracted by ice crystals
A. discharge between rain clouds and Earth