Q: A student is asked to calculate the total magnification of a microscope with an ocular lens of 10x and an objective lens of 40x. Which equation should they use?

$$Total\ Magnification = Ocular\ Lens \times Objective\ Lens$$

Question 1

Which of the following best describes the concept of homeostasis in human physiology?

Accepted Answer

The maintenance of a stable internal environment despite changes in external conditions.

Question 2

A patient presents with a blood pH of 7.1. Which physiological mechanism is most likely to be activated to restore homeostasis?

Accepted Answer

The respiratory system will increase the rate and depth of breathing to expel more $$CO_2.$$

Question 3

Which of the following is NOT a function of the integumentary system?

Accepted Answer

Production of red blood cells.

Question 4

A student is asked to identify the organ system responsible for transporting nutrients, gases, and wastes throughout the body. Which system should they select?

Accepted Answer

Cardiovascular system

Question 5

Which of the following best illustrates a negative feedback mechanism in the human body?

Accepted Answer

Increase in blood glucose leading to insulin secretion, which lowers blood glucose.

Question 6

A person is exposed to cold weather. Which physiological response is most likely to occur to maintain homeostasis?

Accepted Answer

Shivering to generate heat.

Question 7

Which equation correctly represents the relationship between mass, volume, and density in the context of body composition analysis?

Accepted Answer

$$Density = \frac{Mass}{Volume}$$

Question 8

A patient has a deficiency in calcium ions. Which organ system is primarily responsible for regulating blood calcium levels?

Accepted Answer

Endocrine system

Question 9

Which of the following statements about anatomical position is correct?

Accepted Answer

The body is standing upright, facing forward, with arms at the sides and palms facing forward.

Question 10

A researcher is studying the effects of a new drug on the nervous system. Which level of organization is most appropriate for analyzing the drug’s impact on nerve impulse transmission?

Accepted Answer

Cellular level

Question 11

Which of the following best describes the function of mitochondria in human cells?

Accepted Answer

Production of ATP through cellular respiration.

Question 12

A patient is diagnosed with diabetes mellitus. Which organ system is primarily affected?

Accepted Answer

Endocrine system

Question 13

Which of the following is a correct example of a positive feedback mechanism?

Accepted Answer

Release of oxytocin during labor to intensify uterine contractions.

Question 14

A student is asked to calculate the total magnification of a microscope with an ocular lens of 10x and an objective lens of 40x. Which equation should they use?

Accepted Answer

$$Total\ Magnification = Ocular\ Lens 	imes Objective\ Lens$$

Question 15

Which of the following is a function of the skeletal system?

Accepted Answer

Protection of internal organs.

Question 16

A patient suffers a severe burn that destroys the epidermis and dermis. Which function of the skin is most compromised?

Accepted Answer

Protection against infection and dehydration.

Question 17

Which of the following best describes the role of enzymes in chemical reactions within the human body?

Accepted Answer

Enzymes act as catalysts to speed up chemical reactions by lowering activation energy.

Question 18

A patient is experiencing muscle weakness due to low potassium levels. Which organ system is most directly affected?

Accepted Answer

Muscular system

Question 19

Which of the following is the correct sequence of levels of organization in the human body, from simplest to most complex?

Accepted Answer

Cell, tissue, organ, organ system, organism

Question 20

A patient is unable to maintain proper blood pressure due to a malfunction in the baroreceptor reflex. Which type of feedback is disrupted?

Accepted Answer

Negative feedback

Syllabus Overview: Anatomy & Physiology I (Fall 2025, UTRGV)

Study Guide - Practice Questions

Study Guide - Flashcards