Some people have speculated that marsupials and placentals may have evolved viviparity independently. What evidence could be used to support this?
What will be an ideal response?
The anatomy of the condition of re-routing the ureters from the cloaca to the bladder, and the formation of a uterus with a midline contact, are different in the two groups, implying parallel evolution of features that are important for the females carrying the young.
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Gastrointestinal tract lymph is also called ________.
Fill in the blank(s) with the appropriate word(s).
What happens to blood pressure during exercise?
A. It increases slightly; some cardiovascular changes promote an increase while others promote a decrease. B. It decreases greatly because vasodilation in skeletal muscles and heart tissue more than offsets factors that increase blood pressure. C. It decreases slightly; some cardiovascular changes promote a decrease while others promote an increase. D. It increases greatly because cardiac output increases and vasoconstriction in inactive organs raises blood pressure directly.
Which of the following statements is true regarding the hormone secretion?
a. Hypothalamus secretes releasing hormones (e.g., TRH) that act on the posterior pituitary gland b. Hypothalamus secretes releasing hormones (e.g., TRH) that act on the anterior pituitary gland c. Hypothalamus secretes stimulating hormones (e.g., TSH) that act on the peripheral glands d. Anterior pituitary gland secretes releasing hormones (e.g., TRH) that act on the peripheral glands e. Posterior pituitary gland secretes stimulating hormones (e.g., TSH) that act on the peripheral glands
Which of the following is NOT a sympathetic prevertebral ganglion?
a) Celiac ganglion b) Ciliary ganglion c) Superior mesenteric ganglion d) Inferior mesenteric ganglion e) All are prevertebral ganglia