Gonads begin to develop ________ weeks after fertilization
A) 2 to 3 B) 5 to 6 C) 8 to 9 D) 20 to 24 E) 36 to 38
B
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The primary factor responsible for moving the chyme forward in the small intestine is
a. mass movement b. migrating motility complex c. a gradient in the frequency of segmentation along the length of the small intestine d. sequential ring-like contractions that move progressively forward along the length of the small intestine in a stripping motion, pushing the chyme ahead of the contraction e. stimulation of the intestinal smooth muscle by enterokinase
Hypophysiotropic hormones from the hypothalamus
a. control the release of oxytocin and vasopressin from the posterior pituitary. b. travel via neuron axons from the hypothalamus to the anterior pituitary. c. are carried in the hypothalamo-hypophyseal portal system. d. are released upon positive-feedback stimulation via the anterior pituitary tropic hormones. e. always act to stimulate the release of anterior pituitary hormones.
A continual recycling of electrical waves through the myocardium is called ________.
A. asystole B. circus rhythm C. atrial flutter D. SA node block
All of the following are interactions between cell mediated immunity and innate immunity, except
A. Macrophage of innate immunity present antigens to helper T cells. B. Cytokines secreted by helper T cells stimulate inflammation. C. Cytokines secreted by helper T cells stimulate phagocytosis. D. Macrophages of innate immunity present antigens to cytotoxic T cells.