Which of the following is not necessary for IgE mediated hypersensitivity?

Neutrophils

Histamine released by mast cells leads to all of the following symptoms except

high fever

What are IgE molecules?

Immunoglobulin E (Antibodies) plays a role in allergies and asthma

If a person is sick with the common cold on May 1st, gets well, and then memory cells are exposed to the same virus on May 15th, what would the person's symptoms most likely be?

No symptoms at all due to IgM and IgG

Lymphatic vessel _________ cells are different from blood vessel cells.

Endothelial

Lymphatic endothelial cells ______ have tight junctions and they do not have a continual basal lamina.

Don't

There are large gaps between the endothelial cells so _______ and large molecules can pass between them.

lymphocytes

The overlapping endothelial cells make _______ that can open and close.

Valves

They will open and close due to the _______ of the lymph fluid flowing through the vessel.

Pressure

Which is of the following is true when interferon attaches to a cell?

The virus can enter the cell but can not replicate.

When interferon from one cell attaches to a second cell, _________.

the recipient cell makes enzymes that degrade mRNA and prevent viral protein synthesis

Which of the following is true regarding interferon?

Interferon is produced by one cell and used to warn nearby cells of the same type.

People with type AB blood have __________.

both type A and type B antigens on their red blood cells

When type B blood is given to a person with type A blood, __________.

the B antigen from the donor reacts with anti-B antibody in the recipient

People with type O blood can be universal donors because their red blood cells contain neither A antigens nor B antigens on their surface.

True or False

True

A person with type O blood may receive blood from a person with type B blood.

True or False

False

Which of the following statements is not true of the hepatitis B vaccine?

It consists of an internal protein from the virus.

The vaccine used to prevent measles consists of live measles viruses. This type of vaccine is most likely __________.

an attenuated vaccine

A subunit vaccine is composed of __________.

purified parts of a microorganism

Which of the following is produced by cytotoxic T cells?

Perforin, which makes holes in cell membrane of infected cells

Cytotoxic T cells produce:

Perforin, which makes holes in cell membrane of infected cells

Which of the following is true regarding infected cells?

They display peptide fragments of degraded viral proteins on their cell surface.

Cytotoxic T cells recognize __________.

viral antigens and class I MHC

The _______ is the amount of air remaining in the lungs after a forced expiration.

residual volume

The volume of air exchanged during normal breathing is called the

Tidal volume

After a normal inspiration, the amount of air that can then be inspired forcefully is called the

Inspiratory reserve volume.

If you subtract the residual volume from the total lung capacity, you get the

Vital capacity

The vital capacity minus the _____ equals the inspiratory capacity.

Expiratory reserve volume

The effects of obstructive diseases such as asthma or emphysema may be determined by measuring the

Forced expiratory volume

Which of the following are bicarbonate ions exchanged for when they diffuse from plasma back into red blood cells?

chloride ions

At the respiratory membrane, the partial pressure of carbon dioxide in the plasma is _____ than in the _____ of the lungs.

higher; alveoli

This concept, specifically the change in pH, is referred to as the

Bohr effect

Of the three forms of lung cancer, the most common is ______carcinoma.

Squamous-cell

In this type, ____ develop bleeding lesions as the dividing epithelial invade the bronchiole wall.

bronchi

A second form, adenocarcinoma, originates in the _____ glands of the lamina propria.

mucous

The least common but most dangerous is small-cell carcinoma, which easily and quickly _____ to other organs.

metastasizes

Respiratory gases cross the respiratory membrane by ___________________

simple diffusion

Which environment separated by the respiratory membrane would display the highest oxygen partial pressure?

Alveolar air

Surfactant is produced by __________________

Type II pneumocytes

Increased production of surfactant would __________________

result in an increase in the thickness of the respiratory membrane, which would decrease diffusion of respiratory gases.

Insufficient surfactant production would result in

a tendency for the lungs to collapse.

At the onset of a bout of exercise, tissue ________ levels briefly increase due to elevated aerobic respiration.

carbon dioxide

Carbon dioxide production in respiring tissues creates an increased level of carbonic acid in the blood, resulting in a _______ blood pH.

decreased

Altered blood pH during exercise causes the affinity of hemoglobin to decrease, which is shown as a _______ shift in the oxyhemoglobin dissociation curve.

rightward

As a result of the oxyhemoglobin shift during exercise, blood arriving at the respiring tissues will deliver a(n) ______ amount of oxygen.

increased

During recovery from exercise (cool-down), blood_____ increases back to its pre-exercise state.

pH

Oxygen unloading occurs at the _________________________ This process causes a(n) _________________ in the oxygen partial pressure of the blood leaving this region.

tissues.; decrease

Hyperpnea would result in ___________________________ within the blood

an increase in Pressure (oxygen) and a decrease in Pressure (carbon dioxide)

Decreased Pressure (carbon dioxide) results in an increase in blood pH levels. Both of these conditions result in a shift of the oxygen-hemoglobin dissociation curve to the ______________________. This shift _______________ hemoglobin’s affinity for oxygen.

left; increases

Increased levels of 2,3 BPG occur in response to decreased blood pH levels. With all other variables unchanged, an increased concentration of 2,3 BPG in the blood would _____________________.

result in a shift of the oxygen-hemoglobin dissociation curve to the right enhancing unloading of oxygen at the tissues.

The altitude of Kabul, Afghanistan, is approximately 6000 feet. What is the approximate alveolar oxygen partial pressure found here?

85 mm Hg

Under normal conditions, the alveolar oxygen partial pressure is ______________________ than the atmospheric oxygen partial pressure.

always lower

Within the Tibetan highlander population, genetic variation has been found to determine relative oxygen-hemoglobin saturation levels. Individuals within this population may be homozygous for either the low oxygen saturation gene or the high oxygen saturation gene. Individuals may also be heterozygous, carrying one low and one high oxygen saturation gene. Based on this information, individuals within the population carrying __________________________ alleles are expected to demonstrate a physiological advantage for survival.

homozygous high oxygen saturation population

No genetic differences were found among the Andean population in either oxygen-hemoglobin saturation levels, nor hemoglobin concentrations. However, this group as a whole displayed higher hemoglobin concentration levels than their lower altitude neighbors. The most accurate explanation for this finding is that individuals constantly exposed to lower atmospheric partial pressures for oxygen would have a physiologic response which would _______________________.

increase the cumulative number of red blood cells

If intrapulmonary pressure was 760 mm Hg, what would you expect the intrapleural pressure to be?

756 mm Hg

Contraction of the diaphragm and external intercostal muscles results in ____________ in the thoracic volume which results in _______________ of the intrapulmonary pressure.

an increase; a decrease

Negative pressure ventilation, demonstrated by iron lungs, allows a person to breathe by producing an intermittent negative pressure that moves across the chest and diaphragm. This specific action would artificially induce the intrapulmonary pressure to _____________ atmospheric pressure thus resulting in ______________

drop below; inspiration.

When this negative pressure stops being applied, the lungs __________________and the intrapulmonary pressure __________________

recoil; increases

When using positive pressure ventilators, what triggers the elastic recoil of the lung, and what does this action cause?

airway pressure reaching zero; expiration

Oxygen molecules bind ___________________ of the hemoglobin.

specifically to the heme region

A single hemoglobin displaying a saturation level of 75% would be bound to ___________________________

three oxygen molecules.

The binding of CO to hemoglobin causes the oxygen-hemoglobin dissociation curve to ___________________

shift to the left, indicating that the carboxyhemoglobin is less likely to release bound oxygen.

Acute carbon monoxide poisoning would result in ____________________ of the tissues because oxygen ____________________

hypoxia; is not released from hemoglobin in sufficient amounts at the tissues.

What determines the direction of gas movement?

The partial pressure differences

Which of the following statements about partial pressures of gases in the lungs is true?

Po₂ in the lungs > Po₂ in the blood; Pco₂ in the lungs < Pco₂ in the blood

Which of the following statements about partial pressures of gases in the tissues is true?

Po₂ in blood > Po₂ in tissues; Pco₂ in blood < Pco₂ in tissues

Which of the following are primarily responsible for maintaining the salinity gradient of the renal medulla?

Juxtamedullary nephrons

The average person has approximately __________ nephrons per kidney.

1.2 million

Which renal structure is responsible for producing hypertonic urine by reabsorbing water while allowing metabolic wastes and NaCl to pass through?

Collecting duct

In a healthy kidney, very little __________ is filtered by the glomerulus.

protein

Catabolism of urea is

Proteins

Catabolism of uric acid is

Nucleic acids

Aldosterone acts on the __________.

distal convoluted tubule

The __________ muscle is located in the urinary bladder.

detrusor

The countercurrent multiplier recaptures __________ and is based on fluid flowing in the __________ direction in two adjacent tubules.

sodium; opposite

The transition from an afferent arteriole to an efferent arteriole occurs in the __________.

glomerulus

Renin hydrolyzes angiotensinogen, which is released from the _________, to form angiotensin I.

liver

Which of the following is not a function of the kidneys?

They release waste into the bloodstream.

A byproduct of protein catabolism, __________ constitutes approximately one-half of all nitrogenous waste.

urea

The urine is most likely to be hypotonic when the __________.

body's water volume is high

Micturition is another term for __________.

the elimination of urine

Which organ system does not excrete waste?

The cardiovascular system

Normal urine from a healthy person should not contain __________.

glucose

Loop diuretics reduce body water content by acting on the __________.

countercurrent multiplier system

Glucose and amino acids are reabsorbed from the glomerular filtrate by the __________.

proximal convoluted tubule