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31 Cards in this Set
- Front
- Back
Which pair of hormones is responsible for keeping blood glucose levels within normal ranges? |
insulin and glucagon |
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What pollinates most gymnosperms? |
wind |
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What two organs are considered to be part of the lymphatic system? |
spleen and thymus |
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Gas exchange in the lungs occurs due to: |
passive diffusion of gases between the blood and the alveolus. |
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Increases in plant length (such as overall height or branch and root length) result from cell division that occurs: |
only in apical meristems at shoot and root tips. |
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Ferns and mosses need water for sexual reproduction because: |
they have swimming sperm. |
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Which of these parts of the brain controls breathing and heart rate? |
medulla |
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An essential nutrient is one that: |
cannot be made by the animal. |
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Tomatoes that are planted upside down still grow upright, displaying: |
gravitropism. |
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Which of the following characteristics helps differentiate between a monocot and a dicot? |
number of flower parts |
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Natural killer cells: |
destroy body cells that have been invaded by viruses. |
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Ventricles force blood directly into the: |
arteries. |
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Plasma is primarily: |
water. |
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Nonspecific internal defenses include: |
inflammation. |
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If you remove red blood cells, white blood cells, and platelets from blood, what remains? |
plasma |
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The autonomic nervous system controls: |
contractions of involuntary muscles. |
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Which division has been reduced to one remaining species? |
ginkgos |
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Why do mosses and liverworts need to live in a moist environment? |
reproduction |
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What type of digestion takes place inside the mouth? |
mechanical and chemical digestion |
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Local hormones are: |
chemicals that are released by a cell into the surrounding extracellular fluid and affect only other nearby cells. |
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In the lungs, oxygen moves from air into blood by: |
diffusion. |
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What is the cardiac cycle? |
the alternating relaxation and contraction of the heart chambers |
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It is important that the atrioventricular (AV) node produce a delay between the contraction of the atria and the contraction of the ventricles because this allows the: |
ventricles to fill to capacity. |
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All of the following can bind to hemoglobin EXCEPT: |
nitrogen. |
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Axons: |
carry an action potential in the direction of a synapse. |
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Which part of the digestive tract has the lowest pH? |
stomach |
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Motor neurons: |
connect to the effector organs. |
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Cells that produce antibodies and provide future immunity against similar pathogens are: |
B cells. |
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Memory, sensory processing, motor responses, creativity, and higher intellectual functions are carried out by the: |
cerebrum. |
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The cells that line the human respiratory passages secrete: |
mucus. |
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To limit water loss, land plants developed: |
a cuticle. |