Question 1

Which of the following best describes the difference between hydrophobic and hydrophilic molecules, and how does this difference affect their location in the plasma membrane?

Accepted Answer

Hydrophobic molecules avoid water and are found in the core of the plasma membrane, while hydrophilic molecules interact with water and are found on the membrane surfaces.

Question 2

A patient is given an intravenous solution that is hypertonic relative to their blood plasma. What will most likely happen to their red blood cells?

Accepted Answer

The red blood cells will shrink as water leaves the cells to balance the osmotic gradient.

Question 3

Which of the following best explains why collagen is important in the extracellular matrix?

Accepted Answer

Collagen provides structural support and tensile strength to tissues, helping maintain their integrity.

Question 4

During aerobic metabolism, which of the following is the correct net ATP yield from one molecule of glucose?

Accepted Answer

$$38$$ ATP

Question 5

Which of the following best describes the process of facilitated diffusion?

Accepted Answer

Movement of molecules from high to low concentration through a membrane protein, without energy input.

Question 6

A patient with chronic kidney disease has a low hematocrit. Which of the following best explains the physiological consequence of this condition?

Accepted Answer

Decreased oxygen-carrying capacity of the blood, leading to tissue hypoxia.

Question 7

Which of the following is a key difference between transcription and translation?

Accepted Answer

Transcription synthesizes mRNA from DNA, while translation synthesizes proteins from mRNA.

Question 8

Which of the following best describes the role of platelets in hemostasis?

Accepted Answer

Platelets initiate the clotting process by adhering to damaged blood vessels and releasing factors that promote coagulation.

Question 9

A patient is found to have a deficiency in vitamin K. Which of the following is the most likely consequence?

Accepted Answer

Impaired synthesis of clotting factors, leading to increased bleeding risk.

Question 10

Which of the following best explains the difference between apoptosis and necrosis?

Accepted Answer

Apoptosis is a regulated, programmed cell death process, while necrosis is uncontrolled cell death due to injury.

Question 11

Which of the following best describes the function of the sodium-potassium pump ($$Na^+/K^+$$ ATPase) in the plasma membrane?

Accepted Answer

It actively transports $$3$$ $$Na^+$$ ions out of the cell and $$2$$ $$K^+$$ ions into the cell, using ATP.

Question 12

A blood sample is analyzed and found to have an osmolality of $$320$$ mOsm/kg. What is the most likely physiological effect?

Accepted Answer

Cells will shrink due to water efflux.

Question 13

Which of the following is a function of the rough endoplasmic reticulum (RER)?

Accepted Answer

Protein synthesis for secretion or membrane insertion.

Question 14

Which of the following best describes the role of hemoglobin in red blood cells?

Accepted Answer

Hemoglobin binds and transports oxygen from the lungs to tissues.

Question 15

A patient with a genetic defect in the gene encoding for fibrinogen would most likely experience which of the following?

Accepted Answer

Impaired blood clot formation, leading to excessive bleeding.

Question 16

Which of the following best explains the difference between primary and secondary active transport?

Accepted Answer

Primary active transport uses ATP directly, while secondary active transport uses the energy from an ion gradient established by primary active transport.

Question 17

Which of the following best describes the function of lysosomes in a cell?

Accepted Answer

Lysosomes digest and recycle cellular waste and foreign material.

Question 18

A patient receives a blood transfusion with mismatched ABO blood type. What is the most likely immediate immune response?

Accepted Answer

The recipient's immune system will attack the donor red blood cells, causing hemolysis.

Question 19

Which of the following best explains the role of vitamin B12 in red blood cell production?

Accepted Answer

Vitamin B12 is required for DNA synthesis during erythropoiesis.

Comprehensive Study Notes: Blood, Cell Structure, Membranes, and Physiology

Study Guide - Practice Questions

Study Guide - Flashcards