Bio 26 Unit 2 Lecture exam previous quizzes Flashcards
The lymph from the left leg re-enters the blood stream which subclavian vein?
left subclavian vein
Lymphatic trunks lead to ___________.
ducts
Lymphocytes that reach the thymus become _____.
T cells
Which of the following would NOT be classified as a lymphoid organ?
- Tonsils
- Pancreas
- Peyer’s patches of the intestine
- Spleen
Pancreas
The lymphatic capillaries are more or less permeable than blood capillaries?
more permeable than blood capillaries
Lymph leaves a lymph node via ________.
efferent lymphatic vessels
When the lymphatic structures of a limb are blocked due to tumors, the result is ________.
severe localized edema distal to the blockage of that limb
Flow of lymph through a lymph node is slowed due to ________.
fewer efferent vessels draining it compared to many afferent vessels feeding it
Which of the following statements is FALSE regarding the spleen?
- The spleen is the largest lymphoid organ.
- The splenic artery and vein enter and exit the spleen at the hilum.
- Clusters of white pulp look like islands in a sea of red pulp.
- Red pulp is where immune functions take place.
Red pulp is where immune function takes place is false
Although B and T lymphocytes originate in the bone marrow, T cells mature in the ________.
Thymus
Vaccinations are an example of __________
Artificially-acquired active immunity
If a cell has a foreign antigen attached to its Class II MHC protein, that is a signal that can be interpreted as which one of the following statements?
“I am an immune cell”
“This antigen is dangerous- get rid of it!”
Which of the following is the typical site of T and B cell activation?
- –Red Marrow
- – Thymus
- – Lymph nodes
- –liver
Lymph Nodes
Antigen Presenting Cell (APC) function by
engulfing an antigen then displaying a fragment outside the membrane and activating T cells
Which of the following is true if you are exposed to an antigen for the 2nd time?
-Your immune response is stronger and faster
- It takes longer for your immune system to respond
Your immune system has a weaker response - Your immune response would be the same as the first exposure
Your immune response is stronger and faster
If Clare has no T-helper cells, she would have _______ cell immunity.
Impaired cell-mediated immunity and
Impaired humoral immunity
Which of the following is the typical site of T cell maturation?
- Red marrow
- Thymus
- Lymph nodes
- liver
Thymus
Immunity gained after being sick is an example of:
- Naturally-acquired active immunity
- Artificially-acquired active immunity
- Naturally-acquired passive immunity
- Artificially-acquired passive immunity
Naturally-acquired active immunity
When a lymphocyte has matured and does not attack cells of the body, it is said to have developed:
Self tolerance
The formation of an antigen-antibody complex can lead to: I - Agglutination II - Neutralization III - Transformation IV - Activation of complement
I, II, IV
Air moves out of the lungs when the pressure inside the lungs is ________.
greater than the pressure in the atmosphere
Unlike inspiration, expiration is a passive act because no muscular contractions are involved. Expiration, however, depends on two factors. (aka. which two factors make the lungs want to collapse?)
the recoil of elastic fibers that were stretched during inspiration and the inward pull of surface tension due to the film of alveolar fluid
Tidal volume is air ________.
Exchanged after normal breathing
The larynx contains ________
the thyroid cartilage
