Calcium binding to ________ initiates skeletal muscle contraction
A) actin B) tropomyosin C) myosin D) troponin
D
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This material provides a mechanism for the maintenance of normal human skin that prevents drying and also is involved in the production of an acid pH to prevent the colonization of poten-tially pathogenic organisms
a. sweat b. bacterocins c. antibodies d. sebum
The species extinctions taking place today are
being caused by ____ activities.
a. human b. volcanic c. plate tectonic d. extraterrestrial e. geothermal
In the knee-jerk reflex arc, the synapse between a
sensory neuron and a motor neuron occurs a. in the brain. b. between the receptor and the spinal cord. c. within the muscle of the leg. d. within the spinal cord. e. in the nerve leading to the spinal cord.
When a young, vigorously growing culture of bacteria is transferred to fresh medium of different composition, the lag phase is usually short or absent.
Answer the following statement true (T) or false (F)