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Concept explainers
Introduction :
There are few antigens and antibodies present on our red blood cells. They are used to tell the blood type and helps in the classification of blood. The presence of specific types of antigens and antibodies decides to or from whom an individual can donate or receive blood respectively. There are such blood types with which an individual can be a universal donor or recipient.
The ABO blood type has two antigens A and B. A person having same antigens can donate blood to one another. Rhesus (Rh) is also an antigen present on the red blood cells. In case a person is Rh positive, they have this antigen and if the person is Rh negative, the RBCs of the person lacks Rh antigen. In case, Rh positive blood is administered to the Rh-negative person, the Rh antigen would be treated as a foreign invader and elicit an immune response.
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Chapter 23 Solutions
EP PRINCIPLES OF HUM.PHYS.-MOD.MAST.A+P
- What is the opening indicated by the pointer? (leaf x.s.) stomate guard cell lenticel intercellular space none of thesearrow_forwardIdentify the indicated tissue? (stem x.s.) parenchyma collenchyma sclerenchyma ○ xylem ○ phloem none of thesearrow_forwardWhere did this structure originate from? (Salix branch root) epidermis cortex endodermis pericycle vascular cylinderarrow_forward
- Identify the indicated tissue. (Tilia stem x.s.) parenchyma collenchyma sclerenchyma xylem phloem none of thesearrow_forwardIdentify the indicated structure. (Cucurbita stem l.s.) pit lenticel stomate tendril none of thesearrow_forwardIdentify the specific cell? (Zebrina leaf peel) vessel element sieve element companion cell tracheid guard cell subsidiary cell none of thesearrow_forward
- What type of cells flank the opening on either side? (leaf x.s.) vessel elements sieve elements companion cells tracheids guard cells none of thesearrow_forwardWhat specific cell is indicated. (Cucurbita stem I.s.) vessel element sieve element O companion cell tracheid guard cell none of thesearrow_forwardWhat specific cell is indicated? (Aristolochia stem x.s.) vessel element sieve element ○ companion cell O O O O O tracheid O guard cell none of thesearrow_forward
- Identify the tissue. parenchyma collenchyma sclerenchyma ○ xylem O phloem O none of thesearrow_forwardPlease answer q3arrow_forwardRespond to the following in a minimum of 175 words: How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients? What are some potential ethical issues associated with using this technology? Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.arrow_forward
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