Which is characteristic of cross bridges?
a. they are a component of thick filaments.
b. they are comprised of actin
c. they have an troponin binding site.
d. they attach to Z lines
e. they allow shortening of the muscle proteins
A
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Most of the ascending and descending pathways to and from the brain cross over (decussate) from one side of the body to the other
Indicate whether the statement is true or false
Which of the following is the correct sequence of events in bulk-phase endocytosis shown in the figure?
a) plasma membrane forms vesicle around extracellular droplets > fusion of lysosome and vesicle > vesicle formed pinches off into cytosol > digestion by enzymes > solutes released b) solutes released > plasma membrane forms vesicle around extracellular droplets > fusion of lysosome and vesicle > vesicle formed pinches off into cytosol > digestion by enzymes c) vesicle formed pinches off into cytosol > solutes released > plasma membrane forms vesicle around extracellular droplets > fusion of lysosome and vesicle > digestion by enzymes d) vesicle formed pinches off into cytosol > plasma membrane forms vesicle around extracellular droplets > fusion of lysosome and vesicle > digestion by enzymes > solutes released e) plasma membrane forms vesicle around extracellular droplets > vesicle formed pinches off into cytosol > fusion of lysosome and vesicle > digestion by enzymes > solutes released
Fibers of motor neurons are divided into
a. sensory and motor neurons b. spatial and nonspatial neurons c. somatic and autonomic neurons d. sympathetic and parasympathetic neurons
The ________ group of neurons contains mostly inspiratory neurons. The ________ group of neurons controls muscles used for active expiration and some inspiratory muscles.
Fill in the blank(s) with the appropriate word(s).