When you go outside on a hot summer day, your body temperature heats up above the normal range. Receptors in your brain detect the change in body temperature. The brain activates nerve cells that send messages to sweat glands, causing the body temperature to fall as the sweat evaporates from the skin. What part of this feedback loop is the stimulus?  

What would a needle travel through as it enters the right lung?  

In a polar covalent bond, the atom that has the most electronegativity will have a    

The maintenance of a relatively constant internal environment is termed:  

Which type of chemical bond involves the sharing of valence electron pairs between two atoms?  

Which epithelium is found lining the urinary bladder?

This type of lipid is the body’s primary long-term energy storage molecule in fat stores.    

In this transport process, an ATP pump is used to drive substances across the membrane against their own concentration gradients.

Albinism is the inherited inability to produce __________ pigment.  

Identify the stratum corneum.