Which statement about the colon is incorrect?
a. Absorption of salt and water converts the colonic contents into fecal material.
b. Colonic bacteria digest cellulose for their own growth and reproduction.
c. Mass movements pack feces into the rectum and stimulate stretch receptors to cause contraction of both anal sphincters, which prevent defecation until an opportune time.
d. No digestive enzymes are secreted by the colon.
e. Haustral contractions are a type of mixing motility.
C
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An organelle that synthesizes steroid hormones and is abundant in the ovaries and testes is the __________ endoplasmic reticulum.
Fill in the blank(s) with the appropriate word(s).
During a mugging, a person experiences an extreme level of fear. What portion of the limbic system is responsible for this and other emotional states?
A. Mammillary bodies B. Cingulate gyrus C. Hippocampus D. The fornix E. Amygdaloid body
Blood that is transported to and from all of the tissues of the body with the exception of the lungs is in the
A) venous circuit. B) pulmonary circuit. C) systemic circuit. D) arterial circuit. E) portal circuit.
The external genitalia of a female are also known as the ________
A) clitoris B) vestibule C) vulva D) perineum