Answer the following questions true (T) or false (F)
1. Fever is an innate response to cellular injury and is initiated when pyrogens are released from damaged cells or certain bacteria.
2. Self antigens usually generate an immune response in our own bodies.
3. T cells directly interact with antigens without other cells involved.
1. TRUE
2. FALSE
3. FALSE
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Genetic drift results in ________________ evolution, which refers to changes in a population that are not due to differences in fitness
Fill in the blank with correct word
The neuroeffector synapse of a postganglionic sympathetic neuron ends in a large branching network with enlarged areas called
A) varicosities. B) terminal arborizations. C) synaptic knobs. D) adrenergic endplates. E) None of the answers are correct.
Smooth muscle
A) does not use calcium. B) is not resistant to fatigue. C) contracts faster than skeletal muscle. D) does not undergo tetanus. E) uses primarily aerobic metabolism.
While on a peaceful morning walk, you pass a construction site where a person suddenly starts using a jackhammer. Unconsciously, you turn your head from the noise. This action is due to the response of which structure(s)?
A. The thalamus B. The inferior colliculi C. The middle cerebellar peduncles D. The superior colliculi E. The substantia nigra