A patient has A positive blood type. What type of blood can this patient receive?

Which of the following are true, assuming A, B, O blood type compatibility?

I. An Rh positive patient cannot receive blood from an Rh negative donor

II. An Rh negative patient cannot receive blood from an Rh positive donor

III. An Rh negative patient can only receive blood from an Rh negative donor

The human immune system is organized along two broad arms: innate immunity and adaptive immunity. The differences between these two approaches to immunity are not always black and white, but can be described in general terms with regard to immunological memory. Adaptive immunity displays this type of memory, and mounts a more intense response to pathogens upon second and subsequent exposures.

Within adaptive immunity, the system is further divided into humoral immunity and cell-mediated immunity. We can say that antibodies are the primary mediators of the former, while CD8 T-cell based cytotoxicity is the mediator of the latter.

CD4 T-cells, unlike their CD8 counterparts, are involved in both the humoral and cell-mediated arms of adaptive immunity. These CD4 cells drive isotype switching, a process that changes the types of antibodies produced after initial exposure to a pathogen to increase their molecular affinity. Additionally, CD4 cells promote the activity of macrophages to directly digest invading pathogens.

After isotype switching facilitates the production of new serum antibody types by B-cells, an experiment shows that antibodies bind more tightly to pathogens. The researcher conducting the experiment concludes that these new antibodies are more efficient at interrupting infection than were the antibodies produced immediately following initial exposure to the pathogen. Which of the following is the most likely?

Which of the following attaches directly to pathogens to mark them for destruction?

Which of the following statements is true?

Which of the following correctly lists the antibodies and antigens an person with A positive blood has?

Which of the following statements are true?

I. An Rh negative patient can receive Rh positive blood once without a reaction, but any subsequent exposure will result in agglutination

II. An Rh positive patient can receive Rh negative blood once without a reaction, but any subsequent exposure will result in agglutination

III. An Rh negative patient can receive Rh negative blood once without a reaction, but any subsequent exposure will result in agglutination

MHC I is found on which cell types?

Which antibody is able to cross the placenta?

The human immune system is organized along two broad arms: innate immunity and adaptive immunity. The differences between these two approaches to immunity are not always black and white, but can be described in general terms with regard to immunological memory. Adaptive immunity displays this type of memory, and mounts a more intense response to pathogens upon second and subsequent exposures.

Within adaptive immunity, the system is further divided into humoral immunity and cell-mediated immunity. We can say that antibodies are the primary mediators of the former, while CD8 T-cell based cytotoxicity is the mediator of the latter.

CD4 T-cells, unlike their CD8 counterparts, are involved in both the humoral and cell-mediated arms of adaptive immunity. These CD4 cells drive isotype switching, a process that changes the types of antibodies produced after initial exposure to a pathogen to increase their molecular affinity. Additionally, CD4 cells promote the activity of macrophages to directly digest invading pathogens.

A scientist is conducting an experiment with a bacterial cell that stimulates an antibody response in mice. The scientist is able to isolate the particular region of the bacterial cell that generates the response and binds to the antibody. This portion of the bacterial cell is best described as the __________.