An average human ejaculate contains about ____ sperm
a. 20-30 million
b. 100-120 million
c. 100-120 thousand
d. 150-200 million
e. 300-400 million
D
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Max could be given an immune serum to the rattlesnake venom, thereby conferring passive immunity. The reason for passive immunization is that the venom could kill the person before active immunity could be established. The passive immunity would last until the "borrowed" antibodies naturally degraded in the body. No immunological memory would be established because B cells are not activated.
What will be an ideal response?
Visual and hearing receptors are irreplaceable, but taste and olfactory receptors are continuously renewed
Indicate whether the statement is true or false
The electron transport chain functions to ________.
A. create a proton gradient across the cytoplasm that reduces oxygen molecules B. reduce oxygen molecules in order to create the energy to bind phosphate molecules together C. create a proton gradient across the outer mitochondrial membrane D. reduce oxygen molecules in order to create the energy to break down ATP
The __________ is an anatomic space located between the base of the tongue and the epiglottis.
A) vallecula B) uvula C) adenoid D) larynx