Humans may have one of four different blood types — A, B, AB, or O. Explain why a person with type O blood is referred to as the "universal donor" yet can receive blood only from other individuals with type O blood
What will be an ideal response?
Like other cells in the body, red blood cells have surface proteins referred to as antigens. These antigens can be different and have been designated as A or B. The human body produces antibodies against any cell protein that is not self, or from its body. Therefore, if a person has type A antigens on his or her red blood cells, the person's body is producing antibodies against B antigens. Type O blood has neither A nor B antigens and therefore can be donated to anyone with any blood type. However, the type O person produces antibodies against the antigens he or she lacks, which are A and B. Consequently, a person with type O blood can receive blood only from another type O individual.
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During vesicular transport, which of the following are the correct sequences of events as a vesicle leaves the organelle?
a. Triskelion, clathron, recycles, Rab, SNARE b. Triskelion, clathrin, Rab, SNARE c. SNARE, Rab, triskelion, clathrin, recycle d. Triskelion, clathrin, recycle e. Triskelion, clathrin, SNARE, recycle
what does the D and T part of the acronym DTP vaccine represent?
What will be an ideal response?
White blood cells (WBCs) are more resistant to lysis than red blood cells (RBCs). When looking at a sample of blood for WBCs, what could you do to reduce interference from RBCs?
A) Mix the blood in a salty solution to cause the RBCs to lyse.
B) Mix the blood in an isotonic solution and allow the WBCs to float to the top.
C) Mix the blood in a hypotonic solution, which will cause the RBCs to lyse.
D) Mix the blood in a hypertonic solution, which will cause the RBCs to lyse.
The separation of the entire cell and its cytoplasm into two daughter cells is known as _______.
a) mitosis b) chromatosis c) cytokinesis d) meiosis e) chromokinesis