The autonomic division of the PNS regulates the activity of which of these? Select all that apply.
A. smooth muscle of the intestinal wall
B. cardiac muscle
C. smooth muscle of blood vessels
D. salivary glands
E. skeletal muscles
Answer: A, B, C & D.
A. smooth muscle of the intestinal wall
B. cardiac muscle
C. smooth muscle of blood vessels
D. salivary glands
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The mammalian zona pellucida is structurally and functionally most similar to which one of the following structures in a sea urchin egg?
A) the cortical granules B) the jelly layer (coat) C) the vitelline envelope D) the plasma membrane
Which of the following describes the process of eutrophication?
a. Nutrient runoff causes the overgrowth of algae. b. Minerals and nutrients cycle through the biotic world. c. Excess phosphorus decomposes plant roots. d. Rainwater falls to the ground through sulfur dioxide gas.
Which neurons integrate information coming into and out of the central nervous system?
a. afferent neurons b. motor neurons c. interneurons d. efferent neurons e. sensory neurons
Imagine that Ubx expression was shifted one segment posteriorly. The results would be:
a. legs in the location of the antennae. c. a homeotic transformation. b. antennae in the location of the legs. d. wings in the location of the head.