Concept explainers
Muscles that oppose one mother are
a. synergists. c. hateful. e. fixators.
b. levers. d. antagonists.
Introduction:
The parts of the human body can move because of the muscles that are the soft tissues in their bodies. These tissues are made up of proteins like actin and myosin. Other than the movement, the role of muscles is to stabilize the joints, and it also maintains the posture of the body.
Answer to Problem 1RAC
The correct answer is option (d) antagonists.
Explanation of Solution
Explanation/justification for the correct answer:
Option (d) antagonists. The two groups of muscles are agonists and antagonists. The group of muscles that opposes the action of another group of muscles are known as antagonists. For example, the extension of the elbow at the arm results because of the triceps brachii, whereas the bending of elbow results because of biceps brachii flexes. In the elbow flexion, biceps brachii and triceps brachii works in opposite manner so, the antagonist of the triceps brachii is biceps brachii. So, the correct answer is option (d).
Explanation for incorrect answer:
Option (a) synergists. Some muscles work in a group for accomplishing specific movements; these muscles are known as synergists. For example, the muscles that help in the flexion of the shoulder are the deltoid, biceps branchii, and pectoralis. These muscles do not oppose function of another muscle. Hence, the given option is not correct.
Option (b) levers. The work of muscles and their bone are performed through the levers. Levers can be described as the machines that are made up of rigid pole which are able to move and pivot at a stationary hinge. These muscles do not oppose the function of other muscles. Hence, the given option is not correct.
Option (c) hateful. The muscles are categorized into two terms, agonists and antagonists. Some muscles oppose function of one another and work in opposite manner, the term that is described to such muscles is antagonists. The term hateful is not appropriate for describing these muscles. Hence, the given option is not correct.
Option (e) fixators. The muscle that acts as a stabilizer while moving another part, that muscle is known as fixator muscle. These muscles make the work of agonist efficient, but these do not oppose their function. Hence, the given option is not correct.
Antagonists are the muscles that oppose one another. Hence, the correct answer is option (d) antagonists.
Want to see more full solutions like this?
Chapter 10 Solutions
ANAT.+PHYSIO.2-LAB.MAN. >CUSTOM<
- Muscles with a triangular shape, such as the pectoralis major muscle in the chest, typically have a: a. convergent fascicle arrangement. b. spiral fascicle arrangement. c. parallel fascicle arrangement. d. unipennate fascicle arrangementarrow_forwardWhich of the following statements is (are) true about lever systems?a. The effort is the origin of the muscle.b. The fulcrum is a joint.c. The resistance is between the effort and the fulcrum in a third-class lever.d. First-class levers are the most common in the human body.e. The quadriceps muscles use a third-class lever to extend the knee.arrow_forwardWhich of the following accurately state(s) the action of a muscle?a. The orbicularis oris closes the eye.b. The deltoid abducts the arm.c. The hamstring muscles extend the knee.d. The biceps brachii flexes the elbow.e. The triceps brachii extends the elbow.arrow_forward
- The muscle system is responsible for a. producing red blood cells. b. providing a framework. c. moving the body. d. conducting impulses.arrow_forwardTo make a muscle contract more strongly,the nervous system can activate more motorunits. This process is calleda. recruitment.b. summation.c. incomplete tetanus.d. twitch.e. concentric contractionarrow_forwardChoose the best for the below question ? The biceps and triceps are considereda. synergists.b. protagonists.c. antagonists.d. None of these are correct.arrow_forward
- During muscle contraction, the I band a. hides the H zone. b. shortens or narrows. c. overlaps the Z line. d. always remains the same length.arrow_forwardWhich of the following statements appropriately use(s) the underlined term?a. A synergisthelps another muscle do its action.b. A fixator holds the insertion steady for another muscle.c. An antagonistopposes the action of another muscle.d. An origin is always a joint.e. The insertion is located on the bone that movesarrow_forwardMuscle spindles trigger the muscle to a. lengthen. b. relax. c. shorten. d. remain fixed.arrow_forward
- Delayed onset muscle soreness (DOMS) is most closely associated with which type of muscle action? a. Flurometic b. Isometric c. Anabolic d. Concentric e. Eccentricarrow_forwardA prominent lateral muscle of the neck that can cause flexion of theneck or rotate the head is thea. digastric. c. sternocleidomastoid. e. platysma.b. mylohyoid. d. buccinator.arrow_forwardWhich of the following is not an arm muscle: A. brachialis B. brachioradialis C. biceps brachii D. triceps femoris E. none of the abovearrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education