Question 1

A patient presents with severe dehydration after prolonged vomiting. Which of the following best explains the physiological process that helps restore fluid and electrolyte balance in the body?

Accepted Answer

Increased secretion of antidiuretic hormone (ADH) by the posterior pituitary, leading to increased water reabsorption in the kidneys.

Question 2

Which of the following best describes the relationship between structure and function in the cardiovascular system?

Accepted Answer

The thick muscular walls of the left ventricle allow it to generate high pressure to pump blood throughout the systemic circulation.

Question 3

A patient with a blocked lymphatic vessel in the lower limb is most likely to experience which of the following symptoms?

Accepted Answer

Edema due to impaired drainage of interstitial fluid.

Question 4

Which of the following equations correctly represents the relationship between cardiac output, heart rate, and stroke volume?

Accepted Answer

$$CO = HR 	imes SV$$

Question 5

A person inhales deeply and holds their breath. Which of the following best describes the immediate effect on blood pH?

Accepted Answer

Blood pH decreases due to accumulation of $$CO_2$$ and formation of carbonic acid.

Question 6

Which of the following best explains why the small intestine has villi and microvilli?

Accepted Answer

To increase the surface area for absorption of nutrients.

Question 7

A patient with damage to the phrenic nerve would have difficulty with which physiological process?

Accepted Answer

Inspiration, due to impaired contraction of the diaphragm.

Question 8

Which of the following is the correct sequence of blood flow through the heart, starting from the vena cava?

Accepted Answer

Right atrium → right ventricle → pulmonary artery → lungs → pulmonary vein → left atrium → left ventricle → aorta

Question 9

A patient is experiencing metabolic acidosis. Which of the following compensatory mechanisms is most likely to occur?

Accepted Answer

Increased respiratory rate to decrease $$CO_2$$ and raise blood pH.

Question 10

Which of the following best describes the function of the hepatic portal system?

Accepted Answer

It transports nutrient-rich blood from the digestive tract to the liver for processing.

Question 11

A patient with a deficiency in intrinsic factor is most likely to develop which of the following conditions?

Accepted Answer

Pernicious anemia due to impaired vitamin B12 absorption.

Question 12

Which of the following best explains why arteries have thicker walls than veins?

Accepted Answer

Arteries must withstand higher pressure generated by the heart's contractions.

Question 13

A patient is diagnosed with a blockage in the common bile duct. Which of the following digestive processes would be most directly affected?

Accepted Answer

Emulsification and absorption of dietary fats.

Question 14

Which of the following equations correctly represents the Henderson-Hasselbalch equation for blood pH?

Accepted Answer

$$pH = pK_a + \log \left( \frac{[$$HCO_3$$^-]}{0.03 	imes $$pCO_2$$} ight)$$

Question 15

A patient with chronic kidney disease is unable to excrete sufficient hydrogen ions. What is the most likely consequence for their acid-base balance?

Accepted Answer

Development of metabolic acidosis due to accumulation of acids.

Question 16

Which of the following best describes the role of the lymphatic system in immune function?

Accepted Answer

It transports lymphocytes and filters pathogens through lymph nodes.

Question 17

A patient is found to have a heart murmur due to a leaky mitral valve. Which of the following best describes the consequence of this condition?

Accepted Answer

Backflow of blood from the left ventricle to the left atrium during ventricular contraction.

Question 18

Which of the following best explains the importance of homeostasis in the human body?

Accepted Answer

It maintains stable internal conditions necessary for optimal cellular function.

Question 19

A patient with a severe liver disorder is unable to produce sufficient plasma proteins. Which of the following is a likely consequence?

Accepted Answer

Decreased plasma oncotic pressure leading to edema.

Question 20

Which of the following best describes the process of negative feedback in the regulation of blood glucose levels?

Accepted Answer

An increase in blood glucose stimulates insulin release, which lowers blood glucose back to normal.

Anatomy & Physiology I Syllabus and Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard