a. biceps brachii acts as agonist
b. triceps brachii acts as antagonist
c. brachioradialis acts as antagonist
d. a and b
2006-12-15 01:16:05 · 3 answers · asked by sourstraws 3 in Science & Mathematics ➔ Biology
Answer d)
The biceps brachii are the agonists, meaning it is the primary mover of flexion at the elbow. They also participate in supination, making your palms face upwards.
The triceps brachii are the antagonists as mentioned by answerer #1.
The brachioradialis is a synergist mostly when the forearm is midway between pronation and supination (hammer curls).
Biceps are agonists (synergists) and triceps are antagonists.
Both A and B.
2006-12-15 05:22:41 · answer #1 · answered by Carl D 4 · 1⤊ 0⤋
it would be B because in flexing the elbow the biceps brachii would act as the agonist, so the tricepts brachii would be the antagonsist.... this is weird all the questions you have posted are the same ones that i just had on my exams, are you using the marieb text book?
2006-12-15 17:17:24 · answer #2 · answered by Chev 1 · 0⤊ 0⤋
B The triceps brachii is the antagonists,
The other two muscles are synergists in the flexion of the forearm but would be antagonists in the extension.
2006-12-15 02:18:41 · answer #3 · answered by docrider28 4 · 0⤊ 0⤋