Question 1

Which of the following best describes the difference between negative and positive feedback mechanisms in homeostasis, and which is exemplified by blood clotting?

Accepted Answer

Negative feedback reverses the original stimulus to maintain balance, while positive feedback amplifies it; blood clotting is an example of positive feedback.

Question 2

A patient presents with a lateral curvature of the vertebral column. Which condition does this describe, and in which region is it most commonly observed?

Accepted Answer

Scoliosis; thoracic region

Question 3

Which of the following correctly matches the muscle tissue type with its structure and function?

Accepted Answer

Skeletal muscle: striated, voluntary, attached to bones for movement

Question 4

Which of the following best describes the role of calcium ions ($$\mathrm{Ca$$^{2+}$$}) in $$skeletal muscle contraction?

Accepted Answer

They bind to troponin, causing tropomyosin to move and expose myosin binding sites on actin.

Question 5

A patient suffers a fracture to the shaft of their femur. Which part of the long bone is most likely affected?

Accepted Answer

Diaphysis

Question 6

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

Accepted Answer

Heat generation

Question 7

Which connective tissue subtype is specialized for energy storage and insulation, and where is it commonly found?

Accepted Answer

Adipose tissue; subcutaneous layer beneath the skin

Question 8

Which of the following best describes the anatomical position?

Accepted Answer

Standing upright, facing forward, arms at sides, palms facing forward

Question 9

Which of the following bones is part of the axial skeleton?

Accepted Answer

Sternum

Question 10

A person is unable to abduct their arm at the shoulder joint. Which type of synovial joint is involved, and which muscle group is most likely affected?

Accepted Answer

Ball-and-socket joint; rotator cuff muscles

Question 11

Which of the following best describes the function of ligaments?

Accepted Answer

Connect bone to bone

Question 12

Which of the following is a correct pairing of a muscle group and its primary action?

Accepted Answer

Hamstrings; flexion of the knee

Question 13

Which of the following is the correct sequence of events in skeletal muscle contraction?

Accepted Answer

Release of acetylcholine → action potential in sarcolemma → release of $$\mathrm{Ca$$^{2+}$$}$$ from SR → cross-bridge formation

Question 14

Which of the following best describes the function of the sarcoplasmic reticulum (SR) in skeletal muscle fibers?

Accepted Answer

It stores and releases $$\mathrm{Ca$$^{2+}$$}$$ ions necessary for muscle contraction.

Question 15

Which of the following is a function of the nervous tissue?

Accepted Answer

Transmission of electrical impulses

Question 16

Which of the following bones articulate to form the elbow joint?

Accepted Answer

Humerus, radius, and ulna

Question 17

Which of the following best describes the difference between simple squamous and stratified squamous epithelium?

Accepted Answer

Simple squamous is a single layer of flat cells; stratified squamous is multiple layers of flat cells.

Question 18

Which of the following is the main energy source required to power muscle contraction at the sarcomere?

Accepted Answer

ATP

Question 19

Which of the following is a correct example of a hinge joint and its movement?

Accepted Answer

Elbow joint; flexion and extension

Question 20

Which of the following best describes the function of osteoclasts in bone tissue?

Accepted Answer

They break down bone matrix, releasing calcium into the blood.

Comprehensive Step-by-Step Guidance for Anatomy & Physiology Midterm Study Guide (Modules 1–3)

Study Guide - Practice Questions

Study Guide - Flashcards