Question 1

Which cell type is responsible for oxygen transport in blood, and what is its primary energy pathway?

Accepted Answer

Red blood cell; anaerobic glycolysis

Question 2

During intense exercise, which muscle fiber type is most likely to fatigue quickly and why?

Accepted Answer

Type IIx (White/Fast); because it has low fatigue resistance and relies on anaerobic metabolism

Question 3

A patient with jaundice is found to have excess bilirubin in their blood. Which process is most likely impaired?

Accepted Answer

Excretion of bilirubin by the liver

Question 4

Which of the following best describes the role of the sarcoplasmic reticulum (SR) in muscle contraction?

Accepted Answer

Releases Ca$$^{2+}$$ ions to trigger the cross-bridge cycle

Question 5

In the cross-bridge cycle, what is the immediate consequence of ATP binding to the myosin head?

Accepted Answer

Myosin head releases from actin

Question 6

Which blood type can receive blood from any donor without risk of agglutination?

Accepted Answer

AB+

Question 7

A marathon runner with low hematocrit is likely to experience which physiological consequence during a race?

Accepted Answer

Premature shift to anaerobic glycolysis and lactic acid buildup

Question 8

Which of the following is a correct sequence for erythropoiesis in red marrow?

Accepted Answer

Myeloid stem cell → Proerythroblast → Erythroblast → Reticulocyte → Mature RBC

Question 9

Which white blood cell is primarily responsible for adaptive immunity?

Accepted Answer

Lymphocyte

Question 10

In muscle contraction, which event occurs when Ca$$^{2+}$$ binds to troponin?

Accepted Answer

Tropomyosin shifts, exposing myosin binding sites on actin

Question 11

Which lever class is most common in limbs and increases speed and range of motion over raw power?

Accepted Answer

Third class lever

Question 12

What is the primary function of platelets in blood?

Accepted Answer

Hemostasis and clotting

Question 13

Which clinical intervention prevents hemolytic disease of the newborn (HDN) in Rh- mothers?

Accepted Answer

Administering RhoGAM to destroy fetal RBCs before maternal sensitization

Question 14

Which of the following is a byproduct of anaerobic glycolysis in muscle cells?

Accepted Answer

Lactic acid

Question 15

What is the average hematocrit value for males, and why is it higher than females?

Accepted Answer

47%; due to androgens

Question 16

Which structure surrounds each individual muscle fiber?

Accepted Answer

Endomysium

Question 17

During the sarcomere contraction, what happens to the A band and I band?

Accepted Answer

A band stays the same, I band shortens

Question 18

Which process clears lactic acid from muscles after intense exercise?

Accepted Answer

Cori cycle (lactate clearance)

Question 19

Which cell type is derived from megakaryocytes?

Accepted Answer

Platelet

Question 20

Which clinical scenario is most likely to result in spastic paralysis?

Accepted Answer

SR calcium pumps fail, causing constant cross-bridge cycling

(Exam) Integrated Physiology of the Muscular and Cardiovascular Systems: Synthesis Guide

Study Guide - Practice Questions