Question 1

Which of the following best describes the relationship between negative feedback and homeostasis in the human body?

Accepted Answer

Negative feedback reverses deviations from a set point, helping maintain homeostasis.

Question 2

A patient presents with a burn that affects both the epidermis and the entire dermis, but not the underlying subcutaneous tissue. Which classification best describes this burn?

Accepted Answer

Third-degree burn

Question 3

Which directional term describes the position of the heart relative to the lungs?

Accepted Answer

Medial

Question 4

A solution has a hydrogen ion concentration of $$1 	imes 10$$^{-4}$$ M. What is its pH?

Accepted Answer

$$4$$

Question 5

Which organelle is primarily responsible for ATP production in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 6

A patient is diagnosed with osteoporosis, a condition characterized by decreased bone density. Which component of bone is most directly affected?

Accepted Answer

Compact bone

Question 7

Which of the following best describes the function of the autonomic nervous system?

Accepted Answer

Regulates involuntary functions such as heart rate and digestion

Question 8

Which membrane transport mechanism requires energy in the form of ATP and moves substances against their concentration gradient?

Accepted Answer

Active transport

Question 9

A muscle cell at rest has a membrane potential of $$-70 mV. $$During an action potential, which ion's rapid influx is primarily responsible for depolarization?

Accepted Answer

Sodium ($$Na^+)$$

Question 10

Which plane divides the body into anterior and posterior sections?

Accepted Answer

Frontal (coronal) plane

Question 11

A patient has a fracture in the femur. Which type of bone is the femur classified as?

Accepted Answer

Long bone

Question 12

Which tissue type is specialized for contraction and movement?

Accepted Answer

Muscle tissue

Question 13

Which of the following is a real-life example of a third-class lever in the human body?

Accepted Answer

The elbow joint during biceps curl

Question 14

Which of the following best describes the function of the skin's keratin molecules?

Accepted Answer

Keratin provides waterproofing and protection against abrasion.

Question 15

Which of the following chemical reactions is an example of a decomposition reaction?

Accepted Answer

$$2H_2O \rightarrow 2H_2 + O_2$

Question 16

Which part of the eye is responsible for focusing light onto the retina?

Accepted Answer

Lens

Question 17

Which division of the nervous system is responsible for the 'fight or flight' response?

Accepted Answer

Sympathetic division

Question 18

Which of the following best describes the function of synapses in neural communication?

Accepted Answer

Synapses allow for the transfer of information between neurons via neurotransmitters.

Question 19

A patient is unable to sense touch on their fingertips. Which type of sensory receptor is most likely damaged?

Accepted Answer

Mechanoreceptors

Question 20

Which of the following best describes the role of DNA in the cell?

Accepted Answer

DNA stores genetic information and directs protein synthesis via RNA.

Comprehensive Study Notes for Anatomy & Physiology: Final Exam Guide

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