Removing some fluid from directly around a developing human fetus is performed by inserting a long needle into the belly of the female patient. What extraembryonic membrane will be punctured in this process?
A. chorion
B. amnion
C. chorionic villi
D. external epithelium of mother
B. amnion
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How do cells distinguish between estrogen and testosterone?
a. only male cells respond to testosterone and female cells respond to estrogen b. estrogen is hydrophilic and binds to surface receptors, while testosterone is hydrophobic and binds to internal receptors c. estrogen and testosterone have similar functional groups but different basic structures that are easily distinguished by their individual receptors d. estrogen and testosterone have the same basic structures, but different side chains that are easily distinguished by their individual receptors e. estrogen and testosterone bind to different carrier proteins, which help receptors distinguish between the two molecules
In angiosperms, where does pollen production take place?
a. megasporangium b. antipodal cells c. microsporangium d. synergid cells
In a medical emergency, when an individual has stopped breathing on their own, mouth-to-mouth resuscitation can be administered while waiting for the arrival of EMTs, in order to increase that individual’s odds of survival. In order to perform mouth-to-mouth resuscitation, air from a conscious individual’s lungs is forced into the lungs of the unconscious individual. What effect does this have?
a. Forcing air into the unconscious individual’s lungs triggers the sympathetic breathing reflex, whereby the lungs ”remember” to start breathing again. b. Mouth-to-mouth resuscitation prevents the unconscious individual from exhaling their residual volume, which would cause the lungs to collapse and lead to inevitable death. c. Some residual oxygen from the conscious individual’s lungs diffuses into the unconscious individual’s blood, and the increased pressure forces some CO2 saturated air out of their lungs. d. Mouth-to-mouth resuscitation keeps the alveoli of the lungs moist and warm, allowing the lungs to continue exchanging gases with the atmosphere on a passive but adequate level.
Which of the following is true of the structure
labeled “A”? a. It is composed of tubulin subunits. b. It is composed of actin subunits. c. It is a microtubule. d. It is an intermediate filament. e. It is a major component of muscle cells.