Some Bird Bones Are Hollow Rather Than Honeycombed

question 98

Multiple Choice

Some bird bones are hollow rather than honeycombed. The hollow bones mostly contain air sacs. The replacement of bone marrow with air sacs is properly understood as an adaptation to

• A) reduce the weight of the bird.
• B) facilitate flight.
• C) eliminate the functions that marrow performs.
• D) All three of the options listed are correct.
• E) Only two of the options listed are correct.

---

Definitions:

Blood Viscosity

The measure of the thickness and stickiness of an individual's blood, which affects how easily it flows through the vessels.

Pumping Action

It refers to a mechanical or physiological function where a fluid is moved through or out of a system, such as the heart pumping blood through the circulatory system.

Respiratory Rate

The number of breaths an individual takes per minute, an important vital sign indicating the respiratory health and metabolic function of a person.

Intracranial Pressure

The pressure exerted by fluids such as cerebrospinal fluid (CSF) within the skull on the brain tissue, used to assess and monitor conditions like head injuries or brain swelling.