Salivary glands secrete _________ to start the digestion of _________.
A. amylase; starch
B. trypsin; proteins
C. amylase; fats
D. pepsin; proteins
E. lactase; milk
A. amylase; starch
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In the United States, every clinical and research institution requires that workers be protected from ________ that is contracted almost exclusively from handling patient specimens (rather than from known exposure or accidents)
A) anthrax B) hepatitis B C) drug-resistant mycobacteria D) influenza
A maple tree's seeds occur in pairs that are enclosed and attached to flat "wings" that are made of a papery tissue. The wings' shape allows them to spin in the air as they fall from the tree; this unusual motion has earned them the nickname "helicopter
seeds." Maple tree seeds are most successful when they are dispersed by A) wind. B) water. C) mammals. D) birds.
Acetylcholine is secreted by which of the following structures?
Sarcoplasmic reticulum Sarcomere Motor neuron Troponin-tropomyosin complex
What are the symptoms of a TB infection?
A. runny nose, sore throat, postnasal drip B. skin rash, fever C. bad cough, chest pain, coughing up blood or sputum D. opportunistic infections, chronic diarrhea E. lethargy, general malaise