BIOL251 Human Anatomy & Physiology I w/Lab 2026 | Module 5 Exam: Muscular System

BIOL251 Human Anatomy & Physiology I w/Lab
2026 | Module 5 Exam: Muscular System

1. Which muscle contracts to enable the main effort required to stand on your
toes?
A. Gastrocnemius
B. Quadriceps
C. Biceps femoris
D. Tibialis anterior
A. Gastrocnemius
2. When rectus femoris contracts, which bone is pulled anteriorly by this
muscle?
A. Femur
B. Tibia
C. Ilium
D. Ulna
B. Tibia
3. When extensor digitorum contracts, what action(s) occurs?

A. Elbow extension
B. Wrist extension
C. Extension of digit 1
D. Extension of digits 2-5
E. A&C
F. B&D
F. B&D (wrist extension, extension of digits 2-5)
4. Contraction of ________ results in _________?
A. psoas major, hip flexion
B. psoas major, hip extension

, C. iliacus, trunk flexion
D. iliacus, trunk extension
A. psoas major, hip flexion
5. When superior gemellus contracts, what action(s) will not occur at the hip?
A. Lateral rotation
B. Internal rotation
C. Adduction
D. Extension
E. Flexion
F. A&D
G. B&E
G. B&E (internal rotation, flexion does not occur)
T/F A motor signal is a signal that is sent from a muscle to the central nervous
system
False
T/F The cervical plexus contains nerves that innervate the thigh
False
True or false: The brachial plexus supplies nerves to the lower extremities.
False
The return of calcium ions into the sarcoplasmic reticulum causes what to
occur?
muscle relaxation (contraction ends)
Your patient is in a seated position with his feet flat on the floor. He is having
difficulty lifting his toes off the floor. What muscle(s) is impaired from
contracting?
tibialis anterior and extensor digitorum longus
When gluteus maximus contracts, which bone is pulled posteriorly by this
muscle?