The sense of pain is one of the most important of all the senses. Nociception is critical to survival because
_____ signals from nociceptors trigger memories and emotions associated with pain.
_____ the activation or inhibition of enzymes are triggered by nociceptors in the brain.
_____ pain triggers behavioral responses that protect from further danger.
_____ signals from nociceptors tell an animal whether it has been injured and increase alertness and arousal.
_____ signals from nociceptors trigger memories and emotions associated with pain.
_____ the activation or inhibition of enzymes are triggered by nociceptors in the brain.
__X__ pain triggers behavioral responses that protect from further danger.
_____ signals from nociceptors tell an animal whether it has been injured and increase alertness and arousal.
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The functioning of enhancers is an example of _____
A) transcriptional control of gene expression B) a post-transcriptional mechanism to regulate mRNA C) the stimulation of translation by initiation factors D) post-translational control that activates certain proteins E) a eukaryotic equivalent of prokaryotic promoter functioning
What is the key difference between choanoflagellates and sponges?
a) Choanoflagellates are strictly aquatic. b) Sponges are multicellular c) Sponges are assymetrical and do not have tissues d) Choanoflagellates have distinctive flagellated cells that function in suspension feeding.
The base that is not found in DNA, but only in RNA is ________.
A. adenine B. guanine C. uracil D. thymine
In muscle contraction, the breaking of the cross-bridge between actin and myosin is caused by ____
a. hydrolysis of ATP into ADP plus Pi b. formation of ATP from ADP and Pi c. release of Pi from the myosin head d. binding of a new ATP to the myosin head e. return of myosin to a high-energy state