Frog Muscle Anatomy Quiz
Questions: 16 · 10 minutes
1. During a dorsal dissection, which muscle would you expect to find along the back of the upper forelimb?
Biceps brachii
Sternoradialis
Pectoralis
Triceps brachii
2. How do the biceps brachii and triceps brachii differ functionally in the frog forelimb?
Both primarily extend the forearm
The biceps extends the forearm, while the triceps adducts the arm
The biceps flexes the forearm, while the triceps extends it
The biceps compresses the abdomen, while the triceps flexes the forearm
3. Which small shoulder muscle helps move the humerus away from the body?
Sternoradialis
Triceps brachii
External oblique
Deltoid
4. A frog draws its upper forelimb dorsally toward the back. Which broad back muscle contributes most directly to this movement?
Rectus abdominis
Gracilis major
Latissimus dorsi
Tibialis anticus longus
5. Which large anterior thigh muscle is primarily responsible for extending the shank at the knee?
Triceps femoris
Semimembranosus
Gastrocnemius
Adductor longus
6. Which action would be most directly affected if the gracilis major could no longer contract?
Extending the forearm
Raising the floor of the mouth
Pulling the upper arm toward the back
Drawing the thigh toward the body's midline
7. What is the primary action of the frog's triceps brachii?
Flexing the forearm at the elbow
Extending the forearm at the elbow
Adducting the thigh
Compressing the abdominal wall
8. A student finds a long, narrow, strap-like muscle crossing the front of the thigh diagonally. Which muscle has most likely been identified?
Adductor magnus
Sartorius
Triceps femoris
Semimembranosus
9. In a ventral dissection, you expose a thin muscular sheet on the side of the abdomen with fibers running obliquely. Which muscle is it?
Rectus abdominis
Latissimus dorsi
External oblique
Pectoralis
10. When the shank bends toward the thigh, which posterior thigh muscle can contribute to that movement?
Triceps femoris
Rectus abdominis
Pectoralis
Semimembranosus
11. A student traces a slender ventral forelimb muscle from the sternum toward the radioulna. Which muscle is it, and what does it do?
Sternoradialis; it flexes the forearm
Deltoid; it compresses the chest
Latissimus dorsi; it flexes the foot
Triceps brachii; it extends the forearm
12. A frog forcefully pushes its foot against the ground during a jump. Which prominent calf muscle helps extend the foot at the ankle?
Gracilis major
Sartorius
Gastrocnemius
Biceps brachii
13. Which muscle group on the ventral chest helps draw the forelimb toward the body?
Pectoralis
Gastrocnemius
Semimembranosus
External oblique
14. A tendon connecting the triceps brachii to the radioulna is damaged. Which movement would be most directly weakened?
Pulling the upper arm toward the chest
Straightening the forearm at the elbow
Bending the forearm toward the upper arm
Drawing the thigh toward the midline
15. Which long muscle is found on the front of the lower hindlimb, alongside the tibia?
Gastrocnemius
Tibialis anticus longus
Gracilis major
Semimembranosus
16. Which paired muscle lies lengthwise along the ventral midline of the abdomen and helps compress the abdominal contents?
Rectus abdominis
Longissimus dorsi
Pectoralis
Coccygeoiliacus