Portage Learning A&P Final Exam

Question 1

Portage Learning A&P Final Exam. It is unnecessary to wash hands if gloves were worn while handling blood. Portage Learning A&P Final Exam.

• True
• False

Question 2

In the capillaries, ________ enters the bloodstream as waste from the surrounding tissues.

• Carbon dioxide
• Glucose
• Nitrogen Portage Learning A&P Final Exam.
• Oxygen

Question 3

Coagulation results in a clot composed solely of platelets without any fibrin involvement.

• True
• False Portage Learning A&P Final Exam.

Question 4

An anticoagulant is any substance that __________ coagulation and blood clotting.

• Enhances
• Facilitates
• Accelerates
• Opposes

Question 5

What is the final step in erythropoiesis that leads to the formation of mature red blood cells?

• Expulsion of organelles from reticulocytes
• Ribosome synthesis
• Hemoglobin accumulation
• Ejection of the nucleus

Question 6

A pulse oximeter measures percent saturation by using red and infrared light to assess oxygen levels in the blood.

• True
• False

Question 7

When viewed under a microscope, red blood cells with reduced hemoglobin appear:

• Normal red coloring
• Darker than normal
• Blue due to oxygenation
• Lighter than normal

Question 8

What is the primary function of platelets in hemostasis?

• They transport oxygen and nutrients.
• They initiate vascular spasm and aid in clot formation.
• They dissolve blood clots to prevent blockages.
• They carry immune cells to the injury site.

Question 9

Which statement correctly describes how blood supports bodily functions?

• It picks up nutrients and immediately delivers them to all body cells without processing.
• It delivers nutrients and oxygen while removing carbon dioxide and other waste.
• It only transports oxygen from the lungs to the heart.
• It removes waste but does not play a role in hormone transport.

Question 10

The myocardium shares some characteristics with both ____________________ and ____________________ muscle tissue.

• (Correct completion: skeletal muscle and smooth muscle)

Question 11

The atrioventricular (AV) node is located in the superior portion of the left atrium.

• True
• False

Question 12

What triggers the depolarization of cardiac conducting cells?

• The influx of calcium ions (Ca²⁺)
• The membrane potential reaching -60 mV
• The efflux of potassium ions (K⁺)
• The influx of sodium ions (Na⁺)

Question 13

What is the term for the period of contraction during the cardiac cycle?

• Repolarization
• Diastole
• Relaxation phase
• Systole

Question 14

In cardiac muscle cells, what process links an action potential to muscle contraction?

• Inhibition of myosin heads
• Closing of sodium channels
• Calcium entry and activation of contractile proteins
• Potassium efflux and membrane repolarization

Question 15

The relative refractory period occurs when the cardiac muscle cell has fully returned to its resting membrane potential. Portage Learning A&P Final Exam.

• True
• False

Question 16

What is the primary force driving blood flow in the heart?

• Pressure gradients between chambers
• Electrical impulses from the SA node
• Suction from the lungs
• Contraction of the veins

Question 17

What happens when ventricular pressure drops below the pressure in the aorta and pulmonary trunk during diastole?

• The electrical impulse initiates ventricular depolarization
• The atrioventricular valves close, preventing backflow into the atria
• The ventricles contract, forcing blood into the great arteries
• The semilunar valves close, preventing backflow into the heart

Question 18

Which of these is true about heart failure?

• It is a condition where the heart can’t pump blood properly
• It always results in a heart attack
• It does not affect blood circulation
• It is caused only by infections

Question 19

The lymphatic system is considered a part of the circulatory system because it interacts with the __________ system, playing a role in fluid balance and immune function.

• Digestive
• Muscular
• Cardiovascular
• Nervous

Question 20

In the pulmonary circuit, pulmonary arteries carry blood that is __________ in oxygen to the lungs for gas exchange.

• High
• Low

Question 21

Which type of artery is known for its ability to expand and recoil due to a high percentage of elastic fibers?

• Venules
• Elastic arteries
• Arterioles
• Muscular arteries

Question 22

Veins have thicker walls than arteries.

• True
• False

Question 23

The capillary hydrostatic pressure (CHP) at the arterial end of the capillary is typically around __________ mmHg.

• 35
• 25
• 50
• 17

Question 24

What is the primary force driving blood through the circulatory system?

• Ventricular contraction creating a pressure gradient
• Arterial dilation without ventricular involvement
• Capillary absorption of excess fluids
• Hydrostatic pressure alone

Question 25

Why does blood with higher viscosity experience reduced flow?

• It has no impact on circulation.
• It decreases resistance and increases flow.
• It decreases resistance, making it easier to circulate.
• It increases resistance, making it harder to circulate.

Question 26

When measuring systemic arterial blood pressure, what does the systolic pressure represent?

• The pressure in the arteries during ventricular contraction
• The pressure in the arteries during ventricular relaxation
• The pressure in the veins during circulation
• The lowest pressure recorded in the arteries

Question 27

Which of the following statements is true regarding systemic circulation?

• Arteries carry blood away from the heart, while veins carry blood toward the heart.
• Systemic arteries carry oxygen-poor blood.
• Systemic veins carry oxygen-rich blood.
• Veins have higher pressure than arteries.

Question 28

What is the correct order of lymph flow through the lymphatic system?

• Lymphatic vessels → Lymphatic capillaries → Lymphatic ducts → Lymphatic trunks → Venous circulation
• Lymphatic capillaries → Lymphatic trunks → Lymphatic vessels → Lymphatic ducts → Venous circulation
• Lymphatic capillaries → Lymphatic vessels → Lymphatic trunks → Lymphatic ducts → Venous circulation
• Lymphatic ducts → Lymphatic trunks → Lymphatic vessels → Lymphatic capillaries → Venous circulation

Question 29

The thymus gland secretes hormones such as thymosin and thymopoietin, which enable ____________ to mature and function as part of the immune system.

• B cells
• T lymphocytes
• Macrophages
• Red blood cells

Question 30

Complete antigens are substances capable of triggering an immune response and reacting with the products of that response, such as ___________.

• Mitochondria
• Red blood cells
• T cell receptors
• Platelets

Question 31

Self-antigens are normally found in the body’s own cells and can include proteins, carbohydrates, lipids, or nucleic acids.

• True
• False

Question 32

An antibody, also called an ___________, refers to both secreted proteins and membrane receptors on B cells.

• Cytokine
• Antigen
• Phagocyte
• Immunoglobulin

Question 33

How does the lymphatic system contribute to immunity?

• It produces insulin to regulate blood sugar.
• It generates platelets for blood clotting.
• It assists immune cells in defending against disease.
• It delivers oxygen to infected tissues. Portage Learning A&P Final Exam.

Question 34

How does the nonspecific (innate) immune system differ from the specific (adaptive) immune system?

• The nonspecific immune system requires activation by antigens, whereas the specific immune system responds immediately.
• The nonspecific immune system acts quickly and provides a general defense, while the specific immune system takes longer and targets particular threats.
• The nonspecific immune system is slower to respond but provides longer-lasting immunity than the specific immune system.
• There is no difference between the two systems.
• The specific immune system includes physical barriers like skin, while the nonspecific immune system only involves immune cells.

Question 35

Which of the following correctly describes the relationship between neutrophils and macrophages in the inflammatory response?

• Macrophages arrive first and attract neutrophils to the infection site.
• Both neutrophils and macrophages promote blood clotting to prevent infection spread.
• Neutrophils arrive first to fight infection, followed by macrophages that clean up debris.
• Macrophages inhibit the activity of neutrophils to prevent excessive inflammation.
• Neutrophils release heparin to dissolve blood clots, allowing macrophages to work.

Question 36

Which statement correctly describes the difference between the primary and secondary immune responses?

• The secondary immune response leads to quicker and more efficient antibody production.
• The secondary immune response only occurs in newborns.
• The primary immune response provides more protection than the secondary immune response.
• The primary immune response is faster and stronger than the secondary immune response.

Question 37

The ________ lining the nasal cavity traps dust and microbes, acting as a physical barrier to pathogens.

• Mucous membrane
• Serous membrane
• Pleural membrane
• Peritoneal membrane

Question 38

________ are the final division of bronchioles within the lungs.

• Respiratory bronchioles
• Primary bronchi
• Terminal bronchioles
• Alveoli

Question 39

The lungs can function normally without a pressure gradient between the air within the lungs and the outside environment.

• True
• False

Question 40

In costal breathing, inhalation occurs when the external intercostal muscles contract and ________ the ribs.

• Lower
• Elevate
• Rotate
• Expand

Question 41

Proper ventilation-perfusion coupling optimizes __________ uptake and carbon dioxide removal.

• Glucose
• Hydrogen
• Oxygen
• Nitrogen

Question 42

What type of receptors provide the DRG with input regarding O₂, CO₂, and pH levels?

• Proprioceptors
• Mechanoreceptors
• Chemoreceptors
• Baroreceptors

Question 43

What primarily drives the body’s urge to breathe?

• Lack of oxygen
• Activity of the respiratory muscles
• Accumulation of carbon dioxide
• Need for ATP

Question 44

Breathing is also known as pulmonary ventilation.

• True
• False

Question 45

Which of the following best describes the events following inhalation during a respiratory cycle?

• Exhalation immediately begins
• Oxygen is absorbed, but carbon dioxide remains in the blood
• Gas diffusion occurs across the respiratory membrane and body tissues
• The lungs stop functioning temporarily

Question 46

Enteroendocrine cells located in the mucosal epithelium secrete hormones into the bloodstream.

• True
• False

Question 47

The esophagus travels a straight path through the mediastinum.

• True
• False

Question 48

Circular folds, or plicae circulares, begin near the duodenum and cause chyme to ______ through the intestine.

• Spiral

Question 45

Which of the following best describes the events following inhalation during a respiratory cycle?

• Exhalation immediately begins
• Oxygen is absorbed, but carbon dioxide remains in the blood
• Gas diffusion occurs across the respiratory membrane and body tissues
• The lungs stop functioning temporarily

Question 46

Enteroendocrine cells located in the mucosal epithelium secrete hormones into the bloodstream.

• True
• False

Question 47

The esophagus travels a straight path through the mediastinum.

• True
• False

Question 48

Circular folds, or plicae circulares, begin near the duodenum and cause chyme to ______ through the intestine.

• Spiral (correct completion based on physiology)

Question 49

The portal triad includes a bile duct, a branch of the hepatic artery, and a branch of the _______.

• Hepatic portal vein
• Central vein
• Inferior vena cava
• Cystic duct

Question 50

One function of the large intestine is the synthesis of certain vitamins.

• True
• False

Question 51

Where does most digestion and nutrient absorption occur in the digestive system?

• Stomach
• Small intestine
• Large intestine
• Esophagus

Question 52

Which of the following best describes the role of accessory digestive organs?

• They directly absorb nutrients into the bloodstream
• They mechanically digest food in the stomach
• They produce secretions that aid digestion and connect to the gut via ducts
• They transport food through the digestive tract

Question 53

How does the density of microvilli in the large intestine compare to that in the small intestine?

• It is lower in the large intestine
• It is the same
• There are no microvilli in the large intestine
• It is higher in the large intestine

Question 54

Which event occurs during the pharyngeal phase of swallowing?

• The soft palate and uvula move to close off the nasopharynx
• Mucus is secreted to lubricate the bolus
• The tongue pushes the bolus to the back of the oral cavity
• The bolus is pushed into the stomach

Question 55

The proximal convoluted tubules empty into collecting ducts that form a system to gather and transport urine.

• True
• False

Question 56

Mechanisms such as active transport, diffusion, facilitated diffusion, and osmosis are involved in ______.

• Plasma protein synthesis
• Glomerular filtration
• Reabsorption and secretion
• Red blood cell production

Question 57

Inside the PCT cell, bicarbonate is reformed and cotransported with ______ across the basal membrane into the interstitial space.

• K⁺
• Na⁺
• Cl⁻
• H⁺

Question 58

The kidneys and ureters are located in the ______ space.

• Subperitoneal
• Transperitoneal
• Intraperitoneal
• Retroperitoneal

Question 59

The urethra carries urine from the bladder to the ______.

• Prostate gland
• Ureters
• Renal pelvis
• Outside of the body

Question 60

Which hormone produced by the urinary system influences red blood cell production?

• Insulin
• Calcitriol
• Cortisol
• Erythropoietin (EPO)

Question 61

Which best describes the purpose of renal clearance in clinical assessment?

• Measuring the lungs’ efficiency in oxygen exchange
• Evaluating cardiac output through the kidneys
• Estimating the absorption rate of nutrients in the intestines
• Determining how much plasma is cleared of a substance by the kidneys

Question 62

How does the ascending limb of the loop of Henle contribute to urine concentration?

• By reabsorbing water through osmosis
• By actively transporting Na⁺ and Cl⁻ into the interstitium
• By secreting urea into the tubular fluid
• By storing filtrate temporarily before excretion

Question 63

Which of the following correctly lists the three main processes involved in the formation of urine in the correct sequence?

• Secretion, filtration, reabsorption
• Filtration, secretion, reabsorption
• Reabsorption, filtration, secretion
• Filtration, reabsorption, secretion

Question 64

Why is water commonly categorized as a nutrient, even though it doesn’t meet the official definition?

• It is needed for the body to work correctly.
• It directly provides calories.
• It contains essential fats and proteins.
• It is used to transport oxygen in the blood.

Question 65

Which of the following is NOT a component of the extracellular fluid (ECF)?

• Intracellular fluid
• Plasma
• Fluid surrounding body cells
• Interstitial fluid

Question 66

Which of the following occurs as a result of water loss from blood plasma during dehydration? Portage Learning A&P Final Exam.

• Increase in blood volume
• Triggering of the thirst response
• Suppression of thirst
• Decreased sweat production

Question 67

What physiological responses occur when extracellular fluid (ECF) volume increases?

• Thirst is increased, leading to more fluid intake
• ADH secretion is stimulated, increasing water retention
• Aldosterone production increases, promoting sodium retention
• Natriuretic peptides are released, promoting sodium and water excretion

Question 68

Calcitonin is secreted in response to which physiological condition?

• Decreased kidney function
• Increased bone resorption
• Low blood calcium levels
• High blood calcium levels

Question 69

How does a buffer maintain pH balance in a biological system?

• By producing strong acids
• By neutralizing water molecules
• By releasing or absorbing H⁺ ions as needed
• By removing all hydroxide ions

Question 70

A patient taking high doses of barbiturates is at risk for developing which condition due to reduced respiratory function? Portage Learning A&P Final Exam.

• Hypercapnia
• Hypoxia
• Hyperthermia
• Hypocapnia

Question 74

What is the function of Mullerian-inhibiting factor during male embryonic development?

• Encourages development of testes
• Degrades mesonephric ducts
• Causes degradation of paramesonephric ducts
• Promotes formation of female reproductive organs

Question 75

Why is the scrotum located outside of the main body cavity?

• To allow more space for the testes to grow
• To protect the spermatic cord
• To enhance testosterone production
• To facilitate a lower temperature necessary for sperm production

Question 76

What is the role of the acrosome in the sperm cell?

• Storing genetic material
• Breaking down the outer layers of the egg
• Producing energy for movement
• Stabilizing the flagellum

Question 77

The labia minora protect the urethra and the entrance to the reproductive tract.

• True
• False

Question 78

What are the three layers of the uterine tube, from outermost to innermost?

• Mucosa, Serosa, Muscle
• Peritoneum, Epithelium, Muscle
• Serosa, Muscle, Mucosa
• Serosa, Mucosa, Muscle

Question 79

In which ovarian region do oocytes develop within supporting structures?

• Medulla
• Germinal epithelium
• Tunica albuginea
• Cortex

Question 80

How does the structure of the myometrium contribute to its function?

• Its multi-directional muscle fibers enable strong uterine contractions.
• Its glandular cells secrete hormones during menstruation.
• It consists of epithelial tissue that absorbs nutrients.
• It is a static layer that does not change during the menstrual cycle.

Question 81

During ejaculation, what prevents urine from mixing with semen?

• The prostate gland absorbs urine.
• The testes retract into the abdomen.
• The bladder’s sphincter muscle constricts.
• The urethra closes off from the epididymis.

Question 82

Which reproductive feature is classified as a male secondary sex organ?

• Uterine tubes
• Penis
• Ovaries
• Vagina

Question 86

How does histocompatibility affect the success of organ transplantation?

Histocompatibility refers to the degree of compatibility between the donor’s and recipient’s tissue antigens, particularly the human leukocyte antigens (HLA). A close histocompatibility match reduces the likelihood that the recipient’s immune system will recognize the transplanted organ as foreign and attack it. Better HLA matching lowers the risk of organ rejection, improves graft survival, and may reduce the amount of immunosuppressive medication required after transplantation. Poor histocompatibility increases the chances of immune rejection and transplant failure.

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Question 87

Explain how erythrocyte concentration changes at high altitude and how this affects oxygen delivery.

At high altitude, the lower oxygen concentration in the air stimulates the kidneys to release erythropoietin (EPO), which promotes the production of more erythrocytes (red blood cells) in the bone marrow. As erythrocyte concentration increases, the blood can carry more oxygen because there is more hemoglobin available to bind oxygen. This adaptation helps improve oxygen delivery to tissues despite the reduced oxygen availability in the environment. However, excessively high erythrocyte levels can increase blood viscosity, making circulation more difficult.

Question 88

How do ingestion and propulsion work together in the early stages of digestion?

Ingestion is the process of taking food into the mouth, where chewing and saliva begin mechanical and chemical digestion. After the food is formed into a bolus, propulsion moves it through the digestive tract by swallowing (deglutition) and peristaltic contractions of the esophagus. Together, ingestion introduces food into the digestive system, and propulsion transports it to the stomach for further digestion. Portage Learning A&P Final Exam.

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Question 89

What neural mechanisms prevent urination during bladder filling?

During bladder filling, stretch receptors in the bladder wall send signals to the spinal cord, activating sympathetic nerves that relax the detrusor muscle and contract the internal urethral sphincter. At the same time, somatic motor neurons maintain contraction of the external urethral sphincter under voluntary control. These neural mechanisms prevent urine release until the bladder is sufficiently full and urination is consciously initiated.

Question 90

A patient with advanced congestive heart failure is admitted for worsening shortness of breath. ABG reveals decreased pH and elevated CO₂. Identify the acid-base disorder and the underlying pathophysiology.

The patient has respiratory acidosis. The decreased pH and elevated CO₂ indicate inadequate removal of carbon dioxide by the lungs. In advanced congestive heart failure, pulmonary congestion and edema impair gas exchange, leading to hypoventilation and CO₂ retention. The excess CO₂ combines with water to form carbonic acid, increasing hydrogen ion concentration and lowering blood pH.

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Question 91

Describe the number and type of cells formed at the end of mitosis and meiosis.

• Mitosis produces two genetically identical diploid (2n) daughter cells that have the same number of chromosomes as the parent cell. These cells are used for growth, repair, and tissue maintenance.
• Meiosis produces four genetically different haploid (n) daughter cells (gametes such as sperm or eggs) that contain half the number of chromosomes as the parent cell. Genetic variation arises through crossing over and independent assortment during meiosis. Portage Learning A&P Final Exam.