Which of the following describes the action of the digastric muscle?
A) elevates the larynx
B) elevates the larynx and depresses the mandible
C) depresses the larynx
D) depresses and retracts the tongue
E) elevates the mandible
Answer: B
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The portion of the pericardium that covers the heart wall is called the ________
A) visceral layer (epicardium) B) fibrous pericardium C) parietal layer of the serous pericardium
If a person were to have substantial blood loss you would expect to see all of the following physiological events to except one. Select the least likely response to substantial blood loss
A) increasing vasomotor tone B) decreased heart rate C) increases peripheral resistance D) a weak, thread pulse
One advantage of signaling pathways involving the generation of second messengers has compared to a signaling pathway that utilizes the influx of ions is
a. the former are much faster in terms of generating cellular responses to first messengers. b. the former are slower in terms of generating cellular responses, allowing cells to be more circumspect in their response to chemical signals. c. the former require less first messenger to elicit a response, since they allow for signal amplification. d. the former require more first messenger to elicit a response, allowing for more rapid termination of the signaling event. e. none of these.
Your brain is not constantly bombarded with signals telling it that you are wearing socks. This is because the touch receptors around your ankle are
A) tonic receptors. B) tonic receptors and slow-adapting. C) phasic receptors and slow-adapting. D) phasic receptors and fast-adapting. E) nociceptors.