BIOS 251 Midterm QUESTIONS
AND VERIFIED CORRECT
ANSWERS GRADED A+
[LATEST 2026-2027] 100%
GUARANTEED PASS
Pleural cavity - CORRECT ANSWER-potential space b/w layers of the pleura that surrounds a
lung
Pericardial cavity - CORRECT ANSWER-potential space b/w layers of the pericardium that
surrounds the heart
Mediastinum - CORRECT ANSWER--central portion of thoracic cavity b/w the lungs
-extends from sternum to vertebral column and from first rib to diaphragm
-contains heart, thymus, esophagus, trachea, and several large blood vessels
Abdominopelvic cavity - CORRECT ANSWER-subdivided into abdominal and pelvic cavities
, Abdominal cavity - CORRECT ANSWER--contains stomach, spleen, liver, gallbladder, small
intestine, and most of large intestine
-the serous membrane of the abdominal cavity is the peritoneum
Pelvic cavity - CORRECT ANSWER-contains urinary bladder, portions of large intestine, and
internal organs of reproduction
Transverse plane - CORRECT ANSWER-Divides body into top and bottom halves
Frontal plane - CORRECT ANSWER-Divides body into anterior and posterior halves
Sagittal plane - CORRECT ANSWER-Divides body into left and right halves
Midsagittal plane - CORRECT ANSWER-Divides body along midline
Parasagittal plane - CORRECT ANSWER-Divides body into unequal left and right halves
4 major elements that make up the majority of molecules in the body - CORRECT ANSWER-
Oxygen, carbon, hydrogen, nitrogen
Atoms - CORRECT ANSWER--the smallest units of matter that retain the properties and
characteristics of an element
-composed of protons, neutrons, and electrons
Ionic bonds - CORRECT ANSWER--two atoms gaining/loosing electrons to complete their outer
shell
-donation/acceptance of electrons pulls atoms together to create ionic bond
-force that holds ions with opposite charges together
AND VERIFIED CORRECT
ANSWERS GRADED A+
[LATEST 2026-2027] 100%
GUARANTEED PASS
Pleural cavity - CORRECT ANSWER-potential space b/w layers of the pleura that surrounds a
lung
Pericardial cavity - CORRECT ANSWER-potential space b/w layers of the pericardium that
surrounds the heart
Mediastinum - CORRECT ANSWER--central portion of thoracic cavity b/w the lungs
-extends from sternum to vertebral column and from first rib to diaphragm
-contains heart, thymus, esophagus, trachea, and several large blood vessels
Abdominopelvic cavity - CORRECT ANSWER-subdivided into abdominal and pelvic cavities
, Abdominal cavity - CORRECT ANSWER--contains stomach, spleen, liver, gallbladder, small
intestine, and most of large intestine
-the serous membrane of the abdominal cavity is the peritoneum
Pelvic cavity - CORRECT ANSWER-contains urinary bladder, portions of large intestine, and
internal organs of reproduction
Transverse plane - CORRECT ANSWER-Divides body into top and bottom halves
Frontal plane - CORRECT ANSWER-Divides body into anterior and posterior halves
Sagittal plane - CORRECT ANSWER-Divides body into left and right halves
Midsagittal plane - CORRECT ANSWER-Divides body along midline
Parasagittal plane - CORRECT ANSWER-Divides body into unequal left and right halves
4 major elements that make up the majority of molecules in the body - CORRECT ANSWER-
Oxygen, carbon, hydrogen, nitrogen
Atoms - CORRECT ANSWER--the smallest units of matter that retain the properties and
characteristics of an element
-composed of protons, neutrons, and electrons
Ionic bonds - CORRECT ANSWER--two atoms gaining/loosing electrons to complete their outer
shell
-donation/acceptance of electrons pulls atoms together to create ionic bond
-force that holds ions with opposite charges together
