Extracellular fluid (ECF) consists mostly of ________

a. blood and lymph
b. cerebrospinal fluid
c. mucus
d. interstitial fluid and plasma


d

Biology & Microbiology

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The main force that moves blood throughout the system of blood vessels is

a. arterial blood pressure. b. skeletal muscle action. c. smooth muscle action. d. valve action. e. venous blood pressure.

Biology & Microbiology

The rate of extinction picks up dramatically during a(n) __________, when a large proportion of Earth’s organisms

become extinct in a relatively short period of geologic time. What will be an ideal response?

Biology & Microbiology

In the prenatal diagnostic technique amniocentesis,

A) a needle is inserted into the umbilical cord to collect fetal blood for screening. B) a thin, flexible tube connected to a needle is inserted through the vagina and into the uterus to collect a tissue sample. C) fetal blood is collected directly from the chorionic villi near the cervix. D) a needle is inserted through the abdominal wall to collect amniotic fluid containing fetal cells. E) the procedure cannot be performed after the fifteenth week of gestation.

Biology & Microbiology

Microspheres 

A. have a boundary membrane. B. are formed from heating protein-like molecules C. contain macromolecules. D. All of these answers are correct.

Biology & Microbiology