Q: Which chemical reaction is responsible for breaking down complex molecules into simpler ones during digestion, and what is the general equation for this process?

Hydrolysis; $$\text{AB} + \text{H}_2\text{O} \rightarrow \text{A} + \text{B}$$

Q: During the cardiac cycle, which equation correctly represents cardiac output?

$$\text{Cardiac Output} = \text{Heart Rate} \times \text{Stroke Volume}$$

Q: Which equation best represents the relationship between pH and hydrogen ion concentration in the blood?

$$\text{pH} = -\log_{10}[\text{H}^+]$$

Question 1

Which of the following best describes the process of homeostasis in the human body?

Accepted Answer

The body maintains a constant internal environment by responding to external and internal changes through negative feedback mechanisms.

Question 2

Which chemical reaction is responsible for breaking down complex molecules into simpler ones during digestion, and what is the general equation for this process?

Accepted Answer

Hydrolysis; $$	ext{AB} + 	ext{H}_2	ext{O} ightarrow 	ext{A} + 	ext{B}$$

Question 3

A patient presents with muscle weakness and cardiac arrhythmias. Blood tests reveal hypokalemia. Which homeostatic mechanism is most likely impaired?

Accepted Answer

Regulation of potassium ions by the kidneys through aldosterone secretion.

Question 4

Which of the following best distinguishes a ligament from a tendon?

Accepted Answer

A ligament connects bone to bone, while a tendon connects muscle to bone.

Question 5

Which type of muscle fiber is most adapted for rapid, powerful contractions but fatigues quickly?

Accepted Answer

Fast-twitch fibers

Question 6

During the cardiac cycle, which equation correctly represents cardiac output?

Accepted Answer

$$	ext{Cardiac Output} = 	ext{Heart Rate} 	imes 	ext{Stroke Volume}$$

Question 7

A patient is diagnosed with Addison's disease. Which endocrine gland is primarily affected, and what is the main hormone deficiency?

Accepted Answer

Adrenal cortex; cortisol

Question 8

Which of the following is a function of erythropoietin in the blood?

Accepted Answer

Stimulates the production of red blood cells in the bone marrow.

Question 9

Which equation best represents the relationship between pH and hydrogen ion concentration in the blood?

Accepted Answer

$$	ext{pH} = -\log_{10}[	ext{H}^+]$$

Question 10

Which of the following best describes the role of surfactant in the respiratory system?

Accepted Answer

It reduces surface tension in the alveoli, preventing their collapse during exhalation.

Question 11

Which process is responsible for the movement of glucose from the blood into body cells, and which hormone regulates this process?

Accepted Answer

Facilitated diffusion; insulin

Question 12

Which of the following is a correct description of the function of plasma membrane proteins?

Accepted Answer

They act as channels and carriers to facilitate the movement of substances across the membrane.

Question 13

Which of the following best describes the difference between autonomic and somatic nervous systems?

Accepted Answer

The autonomic nervous system controls involuntary functions, while the somatic nervous system controls voluntary movements.

Question 14

Which equation correctly represents the process of aerobic cellular respiration?

Accepted Answer

$$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6	ext{O}_2 ightarrow 6	ext{CO}_2 + 6	ext{H}_2	ext{O} + 	ext{ATP}$$

Question 15

Which of the following is a primary function of lymph nodes in the immune system?

Accepted Answer

They filter lymph and provide sites for immune cell activation.

Question 16

Which hormone is released in response to high blood glucose levels, and what is its primary effect?

Accepted Answer

Insulin; promotes uptake of glucose by cells and lowers blood glucose.

Question 17

Which of the following best describes the function of arteries compared to veins?

Accepted Answer

Arteries carry blood away from the heart under high pressure; veins carry blood toward the heart under lower pressure.

Question 18

A patient with diabetes mellitus is experiencing frequent urination and excessive thirst. Which hormone is deficient, and what is the primary effect on glucose metabolism?

Accepted Answer

Insulin; decreased cellular uptake of glucose leading to hyperglycemia.

Question 19

Which of the following best explains the role of the sarcoplasmic reticulum in muscle contraction?

Accepted Answer

It stores and releases calcium ions necessary for muscle contraction.

BIOH 104 Final Exam Study Guide: Anatomy & Physiology Core Topics

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