Mastering A&P Ch.10.3-10.5

Which rectus muscle is innervated by the phrenic nerve?

Diaphragm

Which of the following statements is not true of hernias?

In a diaphragmatic hernia, abdominal contents, such as a portion of the small intestine or greater omentum, enter the inguinal canal.

Which of the following statements is not true of the diaphragm?

It consists mainly of connective tissue and is not considered a muscle

Which of the following best describes the iliococcygeus muscle?

Its origins are the ischial spine and the pubis, and it elevates and retracts the anus.

The ischial and pubic rami are sites of origin for which of the following perineal muscles?

Male and female external urethral sphincter muscles

Which spinal flexor muscle originates at the iliac crest and iliolumbar ligament?

Quadratus lumborum muscle

Which muscle listed below is a flexor of the vertebral column?

Rectus abdominis muscle

Which deep muscle of the spine inserts at the occipital bone between the nuchal lines?

Semispinalis capitis muscle

Which of the following statements is not true, concerning the oblique and rectus muscles?

The rectus muscles extend the vertebral column, assisting the action of the erector spinae muscles.

Which of the following statements is not true of the erector spinae muscles?

They are spinal flexors.

Which muscle of the abdominal region inserts at the linea alba and pubis?

Transversus abdominis muscle

Which of the following oblique muscles inserts on the linea alba and pubis?

Transversus abdominis muscle

The __________ flexes coccygeal joints and elevates and supports the pelvic floor.

coccygeus muscle

Phrenic nerves (C3-C5) innervate the __________, which functions to compress the abdominopelvic cavity upon contraction.

diaphragm

All of the following muscles compress the abdomen, except:

external intercostal muscles

Which muscle inserts at the cartilages of the ribs?

transversus thoracis muscle