What steps are necessary to terminate neurotransmitter action? What would happen if these steps failed?
What will be an ideal response?
Neurotransmitter molecules are either enzymatically degraded or are taken back into the presynaptic terminal (reuptake). Calcium ions are removed from the axon terminal. Failure of these steps prolongs the action of the neurotransmitter. Consequences vary according to the identity of the effector organ. In a skeletal muscle, for example, this can lead to spastic paralysis.
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Though the myofibrils within a muscle fiber run the length of the cell, they are actually composed of groupings of ________ (protein filaments).
Fill in the blank(s) with the appropriate word(s).
Marianne has small, bruise-like spots on her skin and a low platelet count. These
blemishes are most likely A) blood blisters. B) pinpricks. C) petechiae. D) hematomas.
In which lobe of the cerebrum does the supplementary motor area lie?
What will be an ideal response?What will be an ideal response?
A substance that activates plasminogen might be useful to
A) cause clots to form faster. B) cause clot dissolution to proceed faster. C) initiate clot formation. D) mimic erythropoietin. E) recruit neutrophils to an infection.