CSCC BIO 2300 Unit 4 Exam-Questions and Correct
Answers (Expert verified) / Latest Update
Costal Margin - ANSWER -lower border of rib margin formed by the medial edges
of the 8th, 9th, and 10th ribs
True Rib - ANSWER -a rib that is attached directly to the breastbone (1-7)
False Rib - ANSWER -8-12, This rib attaches to the vertebrae in the back and
indirectly to the sternum through cartilage (two words singular)
1st Rib - ANSWER -origin of subclavius
7th Rib - ANSWER -longest rib
12th Rib - ANSWER -Inferior extent of pleura posteriorly
Costal Cartilage - ANSWER -connects ribs to sternum; hyaline cartilage
Head of Rib - ANSWER -Articulates with the costal facet of a thoracic vertebral
body.
Neck of Rib - ANSWER -narrowed region of a rib, next to the rib head
Body of Rib - ANSWER -main part of the rib distal to the neck
Tubercle of Rib - ANSWER -A structure in the neck of the rib that articulates with
the costal facet of a thoracic vertebra's transverse process.
Angle of Rib - ANSWER -portion of rib with greatest curvature; together, the rib
angles form the most posterior extent of the thoracic cage
, Costal Groove of Rib - ANSWER -muscle attachment; arteries, veins, and nerves
run in the groove
Superior Pubic Ramus - ANSWER -narrow segment of bone that passes laterally
from the pubic body to join the ilium
Ischiopubic Ramus - ANSWER -narrow extension of bone that connects the
ischial tuberosity to the pubic body; formed by the junction of the ischial ramus
and inferior pubic ramus
Pubic Arch - ANSWER -Inverted V-shaped arch inferior to pubic symphysis.
Over 90° in females, and about 60° in males.
Pubic Symphsis - ANSWER -A hard, bony, and cartilaginous prominence found
at the midline in the lowermost portion of the abdomen where the two halves of the
pelvic ring are joined by cartilage at a joint with minimal motion.
Ischial Spine - ANSWER -located superior to the ischial tuberosity and projects
medially into the pelvic cavity
Sacrospinus Ligament - ANSWER -from sacrum and coccyx to spine of ischium
Ischial Tuberosity - ANSWER -receives the weight of the body when sitting
Sacrotuberous Ligament - ANSWER -connects sacrum to ischial tuberosity
Pelvic Inlet - ANSWER -superior opening of true pelvis; bordered by pelvic brim
Male Pelvis - ANSWER -Tilted less far forward
Adapted for support of male's heavier build and stronger muscles
Cavity of true pelvis is narrow and deep
Female Pelvis - ANSWER -tilted forward, adapted to childbearing, broad,
shallow, pubic angle lightweight, 80-90◦
, Urogenital Triangle - ANSWER -contains the urethral and vaginal orifices in
females and the base of the penis and scrotum in males
Anal Triangle - ANSWER -contains the anus and external anal sphincter in both
sexes
External Intercostal M. - ANSWER -when they contract, they elevate the ribs
which results in an increase in anteroposterior and lateral diameters of the chest
cavity; responsible for 25% of the air entering lungs during normal quiet breathing
Internal Intercostal M. - ANSWER -Muscle of respiration
Depression of ribs during forced exhalation to decrease transverse dimensions
(anterior-posterior, medial-lateral) of thoracic cavity
Innermost Intercostal M. - ANSWER --the deeper fibers of the internal intercostal
muscle
-separated from the internal intercostals by the intercostal nerves & vessels
Transversus Thoracis M. - ANSWER -depress ribs (maybe proprioception)
Central Tendon - ANSWER -insertion of diaphragm
Caval Opening - ANSWER -opening in the diaphragm that allows the inferior
vena cava to pass through; foramen for the vena cava
Esophageal Hiatus - ANSWER -where the esophagus passes through the
diaphragm
Aortic Hiatus - ANSWER -opening in diaphragm for the aorta to pass from the
heart to the abdomen
Rectus Abdominis M. - ANSWER -Flexion of trunk (sit-ups)
Compression of anterior abdominal wall
Answers (Expert verified) / Latest Update
Costal Margin - ANSWER -lower border of rib margin formed by the medial edges
of the 8th, 9th, and 10th ribs
True Rib - ANSWER -a rib that is attached directly to the breastbone (1-7)
False Rib - ANSWER -8-12, This rib attaches to the vertebrae in the back and
indirectly to the sternum through cartilage (two words singular)
1st Rib - ANSWER -origin of subclavius
7th Rib - ANSWER -longest rib
12th Rib - ANSWER -Inferior extent of pleura posteriorly
Costal Cartilage - ANSWER -connects ribs to sternum; hyaline cartilage
Head of Rib - ANSWER -Articulates with the costal facet of a thoracic vertebral
body.
Neck of Rib - ANSWER -narrowed region of a rib, next to the rib head
Body of Rib - ANSWER -main part of the rib distal to the neck
Tubercle of Rib - ANSWER -A structure in the neck of the rib that articulates with
the costal facet of a thoracic vertebra's transverse process.
Angle of Rib - ANSWER -portion of rib with greatest curvature; together, the rib
angles form the most posterior extent of the thoracic cage
, Costal Groove of Rib - ANSWER -muscle attachment; arteries, veins, and nerves
run in the groove
Superior Pubic Ramus - ANSWER -narrow segment of bone that passes laterally
from the pubic body to join the ilium
Ischiopubic Ramus - ANSWER -narrow extension of bone that connects the
ischial tuberosity to the pubic body; formed by the junction of the ischial ramus
and inferior pubic ramus
Pubic Arch - ANSWER -Inverted V-shaped arch inferior to pubic symphysis.
Over 90° in females, and about 60° in males.
Pubic Symphsis - ANSWER -A hard, bony, and cartilaginous prominence found
at the midline in the lowermost portion of the abdomen where the two halves of the
pelvic ring are joined by cartilage at a joint with minimal motion.
Ischial Spine - ANSWER -located superior to the ischial tuberosity and projects
medially into the pelvic cavity
Sacrospinus Ligament - ANSWER -from sacrum and coccyx to spine of ischium
Ischial Tuberosity - ANSWER -receives the weight of the body when sitting
Sacrotuberous Ligament - ANSWER -connects sacrum to ischial tuberosity
Pelvic Inlet - ANSWER -superior opening of true pelvis; bordered by pelvic brim
Male Pelvis - ANSWER -Tilted less far forward
Adapted for support of male's heavier build and stronger muscles
Cavity of true pelvis is narrow and deep
Female Pelvis - ANSWER -tilted forward, adapted to childbearing, broad,
shallow, pubic angle lightweight, 80-90◦
, Urogenital Triangle - ANSWER -contains the urethral and vaginal orifices in
females and the base of the penis and scrotum in males
Anal Triangle - ANSWER -contains the anus and external anal sphincter in both
sexes
External Intercostal M. - ANSWER -when they contract, they elevate the ribs
which results in an increase in anteroposterior and lateral diameters of the chest
cavity; responsible for 25% of the air entering lungs during normal quiet breathing
Internal Intercostal M. - ANSWER -Muscle of respiration
Depression of ribs during forced exhalation to decrease transverse dimensions
(anterior-posterior, medial-lateral) of thoracic cavity
Innermost Intercostal M. - ANSWER --the deeper fibers of the internal intercostal
muscle
-separated from the internal intercostals by the intercostal nerves & vessels
Transversus Thoracis M. - ANSWER -depress ribs (maybe proprioception)
Central Tendon - ANSWER -insertion of diaphragm
Caval Opening - ANSWER -opening in the diaphragm that allows the inferior
vena cava to pass through; foramen for the vena cava
Esophageal Hiatus - ANSWER -where the esophagus passes through the
diaphragm
Aortic Hiatus - ANSWER -opening in diaphragm for the aorta to pass from the
heart to the abdomen
Rectus Abdominis M. - ANSWER -Flexion of trunk (sit-ups)
Compression of anterior abdominal wall
