Steroid hormones are synthesized from _____
a. amines c. proteins
b. peptides d. cholesterol
D
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If a stimulus is outside the temperature range of the known thermoreceptors, ____
a. no action potential is generated b. a continuous action potential is generated c. the action potential has the highest frequency possible d. the neural signal is perceived as pain e. the neural signal is the same as its closest receptor
Playing catch with your young son, you blithely mention, “Wow, you must have excellent Ruffini endings.” He replies, “No, Mommy! My Ruffinis are beginnings!” Both of you laugh, but you explain that Ruffini endings are very helpful to humans catching balls. How do they help?
a. They detect impact stress, like when a ball hits a hand or glove. b. They detect pain when a ball hits the hand hard enough to hurt. c. They detect skin stretch and deformation in joints, allowing for object gripping. d. They detect deep pressure such as one feels when gripping a ball hard preparing to throw.
What is the name of the dartlike protein threads that ciliates can eject from surface organelles when under attack?
a. gullets b. alveoli c. trichocysts d. vacuoles
Human infection with Erysipelothrix rhusiopathiae takes a milder form and is known as:
A. Impetigo B. Erysipelas C. Necrotizing fasciitis D. Erysipeloid