What is the correct order of water flow for fish respiration?
a. Water into the mouth - goes through the gill slits - water enters the pharynx
b. Water enters the pharynx - goes through the gill slits - water exits the mouth.
c. Water enters the pharynx - goes through the gill slits - water exits the mouth.
d. Water goes through the gill slits - water enters the pharynx - water exits the mouth.
e. Water into the mouth - water enters the pharynx - goes through the gill slits.
e
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Which of the following is characteristic of a steroid hormone action?
A) protein phosphorylation B) cell-surface receptor binding C) internal receptor binding D) second messenger activation
An organelle found in the nucleus is known as a ____
a. nucleolus b. plastid c. vacuole d. microvillus e. basal body
Blood entering the fetal right atrium bypasses the lungs through the ____
a. umbilical arteries b. umbilical veins c. ductus venosus d. foramen ovale e. ductus arteriosus
A simple nervous system _____
A) must include chemical senses, mechanoreception, and vision B) includes a minimum of twelve effector neurons C) has information flow in only one direction: away from an integrating center D) includes sensory information, an integrating center, and effectors