Answers:
1) A - True. The Gluteus Maximus, buttock, is the largest muscle and one of the strongest muscles in the human body. The Gluteus Medius and Minmius lie under the Gluteus Maximus to hold your pelvic upright. The Glutes cause the leg to straighten at the hip when a person runs or walks. Other movement the Gluteus controls:- Moving the thigh backward or inward.
- External rotation: turning the thigh or pelvis outward.
More: 10 Moves to Sculpt a Better Butt
2) C - Heart. Your heart is the hardest-working muscle in the human body. According to WebMD, the heart pumps 100,000 times a day, pumping about 2,000 gallons of blood per day.
3) B - Kissing muscle. The Orbicularis Oris muscle is also known as the kissing muscle. The muscle surrounds the mouth, which forms much of the lip tissue. The muscle helps shape and control the mouth opening, positions and movement. So next time you pucker up, know you're using the Orbicularis Oris muscle.
4) B - False. The hamstrings are actually comprised of three muscles: the Biceps Femoris, Semitendinosus and Semimembranosus. The hamstrings allow you to bend and straighten your leg and control movement from your hip.
Deadlifts are a type of exercise to work out your hamstrings.
More: How to Recover From a Hamstring Strain
5. D - Both A and B. The Latissimus Dorsi (also known as Lats or back) is the main muscle group worked during a lat pull-down. Secondary muscles are the posterior Deltoid muscles (shoulder), Biceps Brachi and Branchialis muscles (arms).
The Zygomaticus muscle is the muscle of the anterior cheek extending to the upper lip.
