Which statement about muscle contraction is false?
a. The sliding filament model was developed by Hugh and Andrew Huxley.
b. Acetylcholine released into the synaptic cleft stimulates muscle contraction.
c. During contraction, the muscle length does not change, but the actin and myosin filaments
shorten.
d. Once the T tubules are depolarized, they open Ca2+ channels in the sarcoplasmic
reticulum.
e. Cross bridges are formed between myosin and actin during muscle contraction.
C
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Regulation & Environmental Sensing
What will be an ideal response?
The kingdoms within the domain Eukarya
A. evolved as a result of endosymbiosis in an early ancestral cell. B. exclude the prokaryotes. C. include the animals, plants, fungi, and protists. D. All of the options are correct.
Crop rotation occurs where different types of plants are grown on the land each season. If you had no access to chemical fertilizers, which of the following would be best to include in your rotation cycle?
A) beans B) cotton C) corn D) tobacco
Viruses are generally measured in
A) nanometers. B) millimeters. C) micrometers. D) centimeters. E) decimeters.