How do hormones and target cells recognize one another? 

Parts (a), (b), and (c) of the figure below represent three graphs of the velocities of different objects moving in straight-line paths as functions of time. The possible accelerations of each object as functions of time are shown in parts (d), (e), and (f). Match each velocity vs. time graph with the acceleration vs. time graph that best describes the motion. a) the velocity vs time graph (a) matches the acceleration vs time graph b) the velocity vs time graph (b) matches the acceleration vs time graph c) the velocity vs time graph (c) matches the acceleration vs time graph

Aortic valve stenosis (i.e., narrowing of the valve opening) may initially cause a pressure increase in the:  

A thrombus (blood clot) in the second (middle) branch of the aortic arch would affect the flow of blood to the:  

Hypersecretion of which of the following hormones causes increased metabolic rate, sensitivity to heat, weight loss, and rapid heart rate?

A jet plane lands with a speed of  m/s and can accelerate at a maximum rate of  m/s2 as it comes to rest.   (b) Can this plane land on a small tropical island airport where the runway is 0.800 km long? Type in the box YES or NO

 Which of the following ions is necessary for thyroid hormone production?

Name four similarities and/or differences between the nervous system and the endocrine system.

Epicardium is ______  

Which of the following is true of elastic arteries?