The term motor unit refers to
A) all the muscle fibers that synapse with one motor neuron.
B) all sarcomeres within a single muscle fiber.
C) an entire skeletal muscle.
D) all the skeletal muscles in one region of the body.
E) all the motor neurons stimulating a skeletal muscle.
A
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Once a signal from the environment is detected by a sensor kinase, the next step to pass on this signal involves the sensor kinase transferring
a. its phosphate to ADP to form ATP. b. its phosphate onto another intracellular signaling molecule. c. phosphate from ATP onto another intracellular signaling molecule. d. phosphate from ATP onto itself.
In studying the medium ground finch on Daphne Major, the Grants noted that each generation of finches had beaks
A. best suited for their parents' environment. B. best suited for their current environment. C. smaller than those of the previous generation. D. larger than those of the previous generation.
In the human menstrual cycle, a burst of which hormone stimulates ovulation?
1.estrogen
2.gonadotropin-releasing hormone
3.follicle-stimulating hormone
4.luteinizing hormone
When a control agent targets the metabolic processes of microbial cells, active younger cells typically die more rapidly than older cells.
Answer the following statement true (T) or false (F)