Water and solutes that are not reabsorbed by capillaries ultimately return to the bloodstream by way of

A) venules.
B) lymphatic vessels.
C) distributing arteries.
D) arterial anastomoses.
E) arteriovenous anastomoses.


B) lymphatic vessels.

Anatomy & Physiology

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Hydatid mole is a type of pregnancy that, without medical intervention, frequently results in the death of the mother. The hydatid mole is thought to result most often from an abnormality in fertilization, such that the egg has two copies of paternal chromosomes, and no maternal DNA. A fetus fails to develop; instead there is rapidly growing chorionic tissue in the placenta, which secretes hCG

and thus leads to a positive pregnancy test and outward signs of pregnancy. The first clue to the obstetrician that the pregnancy is abnormal is often the lack of a heartbeat in the first trimester. A. What is the genotype of the hydatid mole tissue? From the genotype alone, would most science -literate students predict that a normal embryo would form? Explain, indicating what this suggests about maternal and paternal contributions to the embryo. B. The most common cause of molar pregnancy-related maternal death is a type of cancer called choriocarcinoma, with the hydatid mole being the source and thus resembling a tumor. What characteristic of tumors leads to cancer? C. While these pregnancies often spontaneously abort, some women may elect to terminate a hydatid molar pregnancy. Is this a special case of elective abortion or is it tumor-removal? Explain.

Anatomy & Physiology

In mammals, gonadal differentiation is determined by

a. genotypic sex. b. gonadal sex. c. the presence or absence of the Y chromosome. d. the presence or absence of the X chromosome. e. the presence or absence of specific hormones.

Anatomy & Physiology

What organ is responsible for producing most of the plasma proteins known as the complement system?

A) spleen B) heart C) liver D) kidney

Anatomy & Physiology

This portion of the brain ensures that skeletal muscle contraction follows the correct pattern leading to smooth, coordinated movements

A.   Pons B.   Medulla oblongata C.   Cerebrum D.   Cerebellum E.   Epithalamus

Anatomy & Physiology