Which of the following has its primary effect on the brain's pain receptors?
A. adredocorticotropic hormone (ACTH)
B. follicle-stimulating hormone (FSH) and luteinizing hormone (LH)
C. endorphins
D. oxytocin
E. antidiuretic hormone (ADH)
C. endorphins
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The ability to conjugate depends on the presence within the donor cell of a plasmid called the ____
a. X factor b. F factor c. C factor d. sex pilus e. S factor
Variables that are always different between the experimental and the control groups are
a. independent. b. controlled. c. dependent. d. a and c.
Cells in this tissue may have cilia
a. A b. B c. C d. D e. E
You investigated the cytoskeleton and found that all three elements, including the one you suspected, are completely normal. You then decide to look at the motor proteins to see if the cause of the abnormality might lie with one of them. Which one of the following would be your hypothesis?
a. The melanophores in these tadpoles have partially functional or nonfunctional kinesin that would normally transport organelles along microfilaments to the center of the cell. b. The melanophores in these tadpoles have partially functional or nonfunctional dynein that would normally transport organelles along microtubules to the center of the cell. c. The melanophores in these tadpoles have partially functional or nonfunctional dynein that would normally transport organelles along microfilaments to the center of the cell. d. The melanophores in these tadpoles have partially functional or nonfunctional kinesin that would normally transport organelles along microtubules to the center of the cell. e. The melanophores in these tadpoles have partially functional or nonfunctional myosin that would normally transport organelles along microfilaments to the center of the cell.