Rapid inward diffusion of Na+ produces a dramatic change in membrane potential. What is this event called?
A. hyperpolarization
B. excitatory postsynaptic potential
C. saltatory conduction
D. monosynaptic reflex
E. depolarization
E. depolarization
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A scientist is trying to coax stem cells to differentiate into muscle to use as a therapy for muscular dystrophy. He looks at his Petri dish and is excited to see the cells contracting! The cells appear striated and multinucleate. What type of muscle are they?
A. cardiac muscle B. smooth muscle C. involuntary muscle D. skeletal muscle Clarify Question What is the key concept addressed by the question? What type of thinking is required?8 Gather Content What do you already know about muscle tissue? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What best describes the location where sexual spores form in club fungi?
a. in gills of the mushroom b. in club-shaped cells at the gill margin c. in fruiting bodies d. in club-shaped cells of mycelium e. in hyphae of an embryonic mushroom
Some of the "dead stuff in our food" makes it into our food chain through the activity of decomposers such as fungi. Fungi are
a. photoautotrophs b. photoheterotrophs c. chemoautotrophs d. chemoheterotrophs
What primarily determines the shape of animal cells, which lack cell walls?
A) Ribosomes B) Cytoskeleton C) Nucleus D) Cytoplasm E) Endoplasmic reticulum