Ruffini corpuscles are examples of
A) tactile receptors.
B) baroreceptors.
C) chemoreceptors.
D) proprioceptors.
E) nociceptors.
A) tactile receptors.
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The control center for cellular operations is the
A) nucleus. B) mitochondria. C) Golgi apparatus. D) endoplasmic reticulum. E) ribosome.
Receptors
a. respond to various physical or chemical changes in their environment. b. change other forms of energy into electrical energy. c. respond more readily to their adequate stimulus. d. are found at the peripheral endings of afferent neurons. e. all of these answers.
Looking into a microscope, you notice cells swimming, propelled by a long tail. What cell structure must these cells have in order to be mobile?
A) ribosomes B) smooth ER C) flagella D) peroxisomes E) cytoplasm
Homeostasis refers to the relative constancy of the external environment
Indicate whether the statement is true or false.