James misspoke at the banquet last night and became embarrassed. His face looked red because the facial arteries and arteriole muscles relaxed. These arteries and arterioles were ________
A) constricted
B) dilated
C) clogged
D) burst
B
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Motor proteins require energy in the form of ATP. ATP hydrolysis results in a conformational change that allows the protein to move along microtubular tracks (pathways). What structural component of the motor protein contains the ATP binding site
and, therefore, changes shape to enable movement? A) the portion of the molecule that binds to the vesicle being transported B) the stalk C) the portion of the molecule that binds to the microtubular track along which the vesicle is being transported D) a location midway between the vesicle binding site and the portion of the molecule that binds to microtubular tracks
A structure whose secretions cause the uterine endometrial tissue to thicken in preparation for
pregnancy is indicated by the label
a. 1. b. 2. c. 3. d. 5. e. 7.
The pulmonary circulation
a. involves the hepatic portal vein. b. moves oxygen-rich blood to the kidneys. c. includes the coronary arteries. d. leads to, through, and from the lungs. e. leads to, through, and from the heart.
Use the terms provided below to fill in the blanks. Not all words or phrases will be used; each word or phrase may be used more than once
Photons from sunlight that are in the ______________ wavelength range are preferentially absorbed by chlorophyll molecules to raise the energy levels of electrons in the __________ ring. The __________ reflected are lower in energy, which is indicated in the ________, green wavelengths detected by the human eye. benzene longer porphyrin blue orange red electrons photons shorter heme Fill in the blank(s) with correct word