Question 1

Which of the following best describes the role of negative feedback in homeostatic regulation?

Accepted Answer

It causes the variable to change in a direction opposite to the initial change, returning it to its ideal value.

Question 2

A patient is given intravenous fluids that are hypotonic compared to their blood plasma. What is the most likely effect on their red blood cells?

Accepted Answer

Cells will swell and may burst due to water influx.

Question 3

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

Accepted Answer

Mitochondrion

Question 4

Which of the following is TRUE regarding facilitated diffusion?

Accepted Answer

It involves movement of molecules through membrane proteins down their concentration gradient.

Question 5

Triglycerides are composed of which of the following?

Accepted Answer

Three fatty acids and one glycerol molecule

Question 6

During protein synthesis, which organelle is responsible for assembling amino acids into polypeptides?

Accepted Answer

Ribosomes

Question 7

Which type of muscle tissue is characterized by long, cylindrical, multinucleate cells with obvious striations?

Accepted Answer

Skeletal muscle

Question 8

Which of the following best describes the function of aquaporins in cellular membranes?

Accepted Answer

They facilitate the rapid movement of water molecules across the membrane.

Question 9

Which phase of mitosis is characterized by the alignment of chromosomes at the cell's equator?

Accepted Answer

Metaphase

Question 10

A person is exposed to cold temperatures. Which feedback mechanism is most likely to be activated to maintain body temperature?

Accepted Answer

Negative feedback, promoting heat retention

Question 11

Which of the following is a correct description of the structure of DNA?

Accepted Answer

Double-stranded helix with complementary base pairing (A-T and C-G)

Question 12

Which of the following equations correctly represents the dehydration synthesis of a disaccharide from two monosaccharides?

Accepted Answer

$$C_6H_{12}O_6$ + C_6H_{12}O_6$ \rightarrow C$$_{12}$$H_{22}O$$_{11} + H_2O$

Question 13

Which of the following statements about the sodium-potassium pump is correct?

Accepted Answer

It uses ATP to move sodium out of the cell and potassium into the cell against their concentration gradients.

Question 14

Which tissue type is responsible for lining body cavities and forming glands?

Accepted Answer

Epithelial tissue

Question 15

A mutation changes the DNA sequence from ATTGCC to ATCGCC. What type of mutation has occurred?

Accepted Answer

Substitution

Question 16

Which of the following best explains why saturated fatty acids are solid at room temperature?

Accepted Answer

They have straight chains that pack closely together.

Question 17

Which of the following is a function of the rough endoplasmic reticulum?

Accepted Answer

Protein synthesis for export or membrane insertion

Question 18

Which of the following best describes the process of osmosis?

Accepted Answer

Movement of water from an area of lower solute concentration to higher solute concentration through a selectively permeable membrane

Question 19

Which of the following best describes the function of the autonomic nervous system (ANS)?

Accepted Answer

Regulates involuntary functions such as heart rate and digestion

Question 20

During DNA replication, which enzyme is responsible for synthesizing the new DNA strand by adding complementary nucleotides?

Accepted Answer

DNA polymerase

Comprehensive Study Notes for Anatomy & Physiology Exam Preparation

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