Pheromones activate what receptor type?
1.chemoreceptors
2.thermoreceptors
3.mechanoreceptors
4.photoreceptors
1
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Postganglionic autonomic neurons ____
a. are found in the brain b. interact with smooth muscle and glands
c. are found in the spinal cord d. release only acetylcholine e. are considered somatic
Which of the following statements explaining the differences in number and types of peripheral
proteins found on the inner and outer surfaces of cell membranes is correct? a. The functions of the membrane differ on the inside and outside of the cell. b. Not all proteins can pass through the membrane and, thus, more accumulate on the inside. c. Proteins on the outside of the membrane are synthesized at a slower rate than proteins on the inside of the membrane. d. Proteins on the outside of membrane are made extracellularly and are unable to penetrate the phospholipid bilayer and enter the cell. e. The external peripheral proteins are weakly attached to the membrane and are readily washed away.
You are studying a fossilized primate skull and notice that the foramen magnum is located at the center
of the base of the skull. You conclude that:a. the skull belonged to a knuckle walker. b. the skull belonged to a quadruped. c. the skull belonged to a bipedal primate. d. the skull belonged to a brachiator. e. the skull belonged to a gibbon.
Which of the following associations of term and description is NOT correct?
A. sarcolemma - extensive plasma membrane B. actin - thin filament C. sarcomere - the entire muscle cell or muscle fiber D. myosin - thick filament