Question 1

Which structure in the knee joint is primarily responsible for absorbing shock and distributing load between the femur and tibia?

Accepted Answer

Medial meniscus

Question 2

A patient presents with a torn anterior cruciate ligament (ACL). Which of the following best describes the primary function of the ACL?

Accepted Answer

Prevents anterior displacement of the tibia relative to the femur

Question 3

During shoulder abduction, which muscle initiates the movement before the deltoid takes over?

Accepted Answer

Supraspinatus

Question 4

Which ligament stabilizes the hip joint by preventing hyperextension?

Accepted Answer

Iliofemoral ligament

Question 5

Which of the following best describes the organization of skeletal muscle from largest to smallest structure?

Accepted Answer

Whole muscle → Fascicle → Muscle fiber → Myofibril

Question 6

Which connective tissue layer surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 7

During the sliding filament model of muscle contraction, which event occurs immediately after calcium ions bind to troponin?

Accepted Answer

Tropomyosin shifts, exposing actin binding sites

Question 8

A muscle contraction where the muscle length does not change, but tension increases, is called:

Accepted Answer

Isometric contraction

Question 9

Which type of muscle fiber is most resistant to fatigue and is adapted for endurance activities?

Accepted Answer

Slow twitch (Type I)

Question 10

Which structure in a neuron is responsible for transmitting the action potential away from the cell body?

Accepted Answer

Axon

Question 11

Which neuroglial cell forms the myelin sheath in the central nervous system (CNS)?

Accepted Answer

Oligodendrocyte

Question 12

The resting membrane potential of a typical neuron is approximately:

Accepted Answer

$$-70\ 	ext{mV}$$

Question 13

Which neurotransmitter is released at the neuromuscular junction to initiate muscle contraction?

Accepted Answer

Acetylcholine

Question 14

Which spinal cord region contains the most motor neurons responsible for limb movement?

Accepted Answer

Cervical and lumbar enlargements

Question 15

Which meningeal layer is closest to the surface of the spinal cord?

Accepted Answer

Pia mater

Question 16

A patient exhibits a positive Babinski reflex. This is most indicative of:

Accepted Answer

Upper motor neuron lesion

Question 17

Which brain structure is primarily responsible for coordination of voluntary movements and balance?

Accepted Answer

Cerebellum

Question 18

Which cranial nerve is responsible for vision?

Accepted Answer

Cranial nerve II (Optic)

Question 19

Which division of the autonomic nervous system is responsible for 'rest and digest' functions?

Accepted Answer

Parasympathetic division

Question 20

Which sensory receptor is responsible for detecting changes in blood pressure?

Accepted Answer

Baroreceptor

Comprehensive Study Guide: Joints, Muscle Tissue, and Nervous System (Chapters 9–17)

Study Guide - Practice Questions