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BIO 2331 Lab Practical 3 Study Guide
Questions with Verified Solutions 100%
Correct Questions and Correct Answers
Frontalis Ans: — Raises eyebrows
Temporalis Ans: — Closes jaw
Orbicularis oculi Ans: — Closes eye
Levator labii superioris Ans: — Lifts upper lip
Levator anguli oris Ans: — Lifts corner of mouth
Zygomaticus Ans: — Raises corner of mouth
Orbicularis oris Ans: — Closes and protrudes lips
Depressor labii inferioris Ans: — Pulls lip inferiorly
Depressor anguli oris Ans: — Pulls corner of mouth inferiorly
Platysma Ans: — Wrinkles neck, assists in depressing lower jaw
and lower lip
Masseter Ans: — Closes jaw
Buccinator Ans: — Compresses cheeks inward
Sternocleidomastoid Ans: — Flexes and rotates head
Trapezius Ans: — Extends head and adducts scapula
Pectoralis major Ans: — Flex, medially rotate and adduct arm
Serratus anterior Ans: — Depress scapula, elevate arm
External oblique Ans: — Lateral rotation of trunk
External intercostals Ans: — Elevate rib cage for inspiration
Internal intercostals Ans: — Depress rib cage for forced expiration
Rectus abdominis Ans: — Flex and rotate trunk
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Internal oblique Ans: — Lateral rotation of trunk
Rotator cuff Ans: — Rotate arm
Teres minor Ans: — axillary nerve
Supraspinatus Ans: — abduction of shoulder
Infraspinatus Ans: — rotates arm laterally
Teres major Ans: — extends, adducts, and medially rotates arm
Latissimus dorsi Ans: — Extend, adduct, medially rotate arm
Deltoid Ans: — Abducts arm
Biceps brachii Ans: — Flex arm and forearm
Brachialis Ans: — Flex forearm
Triceps brachii Ans: — Extend arm and forearm
Brachioradialis Ans: — flexes forearm
Pronator teres Ans: — pronates forearm
Flexor carpi radialis Ans: — Flex wrist
Palmaris longus Ans: — flexion of wrist
Flexor carpi ulnaris Ans: — Flex wrist
Extensor carpi ulnaris Ans: — Extend wrist
Extensor digiti minimi Ans: — Extend fingers
Extensor digitorum Ans: — Extend fingers
Gluteus maximus Ans: — Extend thigh
Gluteus medius Ans: — Abducts thigh
Hamstring group Ans: — Flex and rotate leg medially, extend thigh
Iliopsoas Ans: — Flex thigh
Iliacus Ans: — flexes thigh
© 2025 All rights reserved
BIO 2331 Lab Practical 3 Study Guide
Questions with Verified Solutions 100%
Correct Questions and Correct Answers
Frontalis Ans: — Raises eyebrows
Temporalis Ans: — Closes jaw
Orbicularis oculi Ans: — Closes eye
Levator labii superioris Ans: — Lifts upper lip
Levator anguli oris Ans: — Lifts corner of mouth
Zygomaticus Ans: — Raises corner of mouth
Orbicularis oris Ans: — Closes and protrudes lips
Depressor labii inferioris Ans: — Pulls lip inferiorly
Depressor anguli oris Ans: — Pulls corner of mouth inferiorly
Platysma Ans: — Wrinkles neck, assists in depressing lower jaw
and lower lip
Masseter Ans: — Closes jaw
Buccinator Ans: — Compresses cheeks inward
Sternocleidomastoid Ans: — Flexes and rotates head
Trapezius Ans: — Extends head and adducts scapula
Pectoralis major Ans: — Flex, medially rotate and adduct arm
Serratus anterior Ans: — Depress scapula, elevate arm
External oblique Ans: — Lateral rotation of trunk
External intercostals Ans: — Elevate rib cage for inspiration
Internal intercostals Ans: — Depress rib cage for forced expiration
Rectus abdominis Ans: — Flex and rotate trunk
© 2025 All rights reserved
, 2 | Page
Internal oblique Ans: — Lateral rotation of trunk
Rotator cuff Ans: — Rotate arm
Teres minor Ans: — axillary nerve
Supraspinatus Ans: — abduction of shoulder
Infraspinatus Ans: — rotates arm laterally
Teres major Ans: — extends, adducts, and medially rotates arm
Latissimus dorsi Ans: — Extend, adduct, medially rotate arm
Deltoid Ans: — Abducts arm
Biceps brachii Ans: — Flex arm and forearm
Brachialis Ans: — Flex forearm
Triceps brachii Ans: — Extend arm and forearm
Brachioradialis Ans: — flexes forearm
Pronator teres Ans: — pronates forearm
Flexor carpi radialis Ans: — Flex wrist
Palmaris longus Ans: — flexion of wrist
Flexor carpi ulnaris Ans: — Flex wrist
Extensor carpi ulnaris Ans: — Extend wrist
Extensor digiti minimi Ans: — Extend fingers
Extensor digitorum Ans: — Extend fingers
Gluteus maximus Ans: — Extend thigh
Gluteus medius Ans: — Abducts thigh
Hamstring group Ans: — Flex and rotate leg medially, extend thigh
Iliopsoas Ans: — Flex thigh
Iliacus Ans: — flexes thigh
© 2025 All rights reserved
