AP 2 Exam 3 pq

The lymphatic system plays an important role in:

metabolizing unused fat

Lymph trunks are major lymphatic ducts that empty into the thoracic duct and:

• Cisterna chyli

The following are examples of Lymphatic structures except:

thyroid

Lymph moves from a/an into the torso through

vessel through a lymph node and back out

vessel.

afferent; efferent efferent; afferent

Lymphatic vessels found in the ilium of the small intestines are:

Peyer's patches

Cytotoxic T cells release which of the following when they recognize their target?

• perforins

Complement can be described by all of the following EXCEPT:

It activates Thelper cells by presenting antigens to them.

Which of the following is not a feature of toll-like receptors (TLRs)?

TLRs control B-cell clonal selection

Which cell is responsible for stimulating differentiation of B-lymphocytes into specialized plasma cells?

Helper T-cells

The lymphoid tissue located in the pharynx that protects against inhaled or ingested pathogens and foreign substances are called the tonsils.

True, The lymphoid tissue located in the pharynx that protects against inhaled or ingested pathogens and foreign substances are called the tonsils.

The lymphatic organ responsible for aged and defective red blood cells from the bloodstream is/are:

• Spleen

The two lymphatic ducts empty into the:

Subclavian veins

Both B & T cells originate in:

• Red bone marrow

Inside the spleen, abnormal blood cells are consumed by the macrophages, and lymphocytes carry out immune responses.

True, Inside the spleen, abnormal blood cells are consumed by the macrophages, and lymphocytes carry out immune responses.

Which of the following statements best represents antigen presentation in an acquired immune response to a pathogen?

Antigen from the pathogen is presented to memory helper T-cells to stimulate a new round of B-cell clonal selection and antibody response

Which of the following structures is NOT considered mucosa-associated lymphoid tissue (MALT)?

spleen

The _____are lymphatic cells the mature in the Thymus. After maturing, they leave the thymus and colonize lymphatic tissues like the spleen and lymph nodes.

t cells

The germinal center of lymph nodules produces lymphocytes

False, The germinal center of lymph nodules produces lymphocytes

Once an individual becomes exposed to a pathogen, the body's immune system responds faster against a second exposure to the same pathogen. Why does this occur?

Specific lymphocytes (memory B cells) quickly produce the proper antibodies

Which of the following T Cells would survive education in the thymus?

one that recognizes self MHC-proteins but not self antigen

The majority of carbon dioxide is transported in plasma as:

bicarbonate ion

Which of the following statments about CO2 is INCORRECT?

There is more CO2 dissolved in the blood plasma than is carried in the RBCs.

Select the correct statement about oxygen transport in blood.

If blood returning to the lungs has a 50% oxygen saturation level, it could indicate increased tissue metabolism.

The chemoreceptors in the aorta are most sensitive to changes in blood:

• O2 concentration

During normal breathing, what is the stimulus for increasing breathing rate and depth?

increased carbon dioxide levels in the blood

Why are the effects of CO2 and Ht on breathing are similar?

both elevate pH levels

The amount of oxygen released from hemoglobin increases:

during hypercapnia

, when CO2 concentration increases

if pyrogens are released if blood becomes more acidic

all of the above

The dorsal and ventral respiratory groups are located in the:

medulla oblongata

The partial pressure of carbon dioxide at point D

40 mmhg

The partial pressure of oxygen at point B.

104 mmhg

The partial pressure of carbon dioxide as blood comes in at point C.

45 mmhg

Atmospheric pressure is around

760 mmhg

Cutting the phrenic nerve will result in:

Paralysis of the diaphragm

Which brain cell respiratory center is thought to generate the respiratory rhythm?

ventral respiratory group