If you bruised your gluteus maximus, you would expect to experience discomfort when?

Which of the following muscles compresses the abdomen?

The rectus abdominis muscles are a pair of long muscles that run vertically up the front of the abdomen, stretching from the pubis to the xiphoid process. They compress the viscera and tense the abdominal wall.

Which leg movement would be impaired by injury to the obturator muscles?

Which leg movement would be impaired by injury to the obturator muscle? Injury to the obturator muscle would impair your ability to laterally rotate the hip.

Which of the following muscles would be the most superficial?

Trapezius. The trapezius is a broad, flat and triangular muscle. The muscles on each side form a trapezoid shape. It is the most superficial of all the back muscles.

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When climbing stairs the gluteus maximus and hamstring group muscles work as antagonists?

Chap 9 Practice exam

Question Answer
When climbing stairs, the gluteus maximus and hamstring group muscles work as antagonists. False
The superiorly positioned spinalis and longissimus groups of the erector spinae muscles each have a capitis muscle, cervicis muscle, and thoracis muscle. True

Which is the strongest muscle of your body?

The strongest muscle based on its weight is the masseter. With all muscles of the jaw working together it can close the teeth with a force as great as 55 pounds (25 kilograms) on the incisors or 200 pounds (90.7 kilograms) on the molars.

Which one of the following does not compress the abdomen?


Term Where do muscles of facial expression originate? Definition The muscles of facial expression originate on the surface of the skull.
Term Which muscle does not compress the abdomen? Definition Internal intercostal
Term The muscle that arises from the pubis is the? Definition Rectus abdominis

Why does a Pennate muscle generate more tension?

In Pennate muscles, the tendon runs through the length of the muscle. Fascicles pull on the tendon at an angle, thus not moving as far at the parallel muscles during a contraction. However, these muscles tend to have relatively more muscle fibers than similarly sized parallel muscles, and thus carry more tension.

How would a drug that blocks acetylcholine release affect muscle contraction?

Acetylcholine (ACh) release is necessary for skeletal muscle contraction, because it serves as the first step in the process that enables the formation of cross-bridges in the sarcomeres. A drug that blocks ACh release would interfere with this cross-bridge formation and prevent muscle contraction.

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What muscle fibers pull in different directions?

The Muscular System

Question Answer
What are the forms of fascicle organization? (1) parallel (2) convergent (3) pennate (4) circular
__________ muscle fibers pulls in different directions, permitting different actions depending on stimulation. convergent
Most of the skeletal muscles in the body are ________ muscles. parallel

What is the prime mover for inhalation?

The primary inspiratory muscles are the diaphragm and external intercostals.

What is the longest muscle in the body?

The longest muscle in your body is the sartorius, a long thin muscle that runs down the length of the upper thigh, crossing the leg down to the inside of the knee.

Which muscles can contract without the need?

Some muscles (skeletal muscles) will not contract unless stimulated by neurons; other muscles (smooth & cardiac) will contract without nervous stimulation but their contraction can be influenced by the nervous system.

Which of the following are the prime movers in inward rotation of the hips?

Internal rotation has one prime mover but around nine other hip muscles assist in this movement. These include the gluteus medius, adductor muscles, and tensor fascia latae (TFL).

Which muscle is the agonist for sitting up?

The sit-up is a callisthenic abdominal exercise that works the rectus abdominus muscles.

Which muscle produces movement that allows you to cross your legs?

The sartorius muscle is the longest muscle in the entire human body. It is a long, thin, band-like muscle found in the anterior region of the thigh. The sartorius functions as an important flexor and rotator of the thigh at the hip joint.

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