Describe the general effects that aging has on joints
What will be an ideal response
changes in joints due to aging include: production of synovial fluid decreases; articular cartilage thins; ligaments shorten and lose flexibility; osteoarthritis develops from wear and tear; bone becomes exposed at joints, and spurs form and the synovial membrane becomes inflamed. These changes lead to decreases in the range of motion of joints.
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Using a micropipette, a neuroscientist injects an axon with enough Na+ ions to move the membrane potential +25mV (from resting). What happens next?
A. Na+ channels will all be inactivated. B. Voltage-gated Na+ will be triggered to open. C. The neuron membrane will be hyperpolarized. D. The membrane potential will be at the Na+ equilibrium potential. E. None of the answer choices are correct.
Name the four major regions of the stomach in order from its junction with the esophagus to the small intestine
A) pyloric part, cardia, body, fundus B) cardia, body, pyloric part, fundus C) fundus, cardia, body, pyloric part D) fundus, pyloric part, body, cardia E) cardia, fundus, body, pyloric part
Deposition of fat by estrogens fosters homeostasis of temperature and energy levels.
Answer the following statement true (T) or false (F)
What kind of tactile receptor is stimulated by light, sustained touch?
a. Pacinian corpuscles b. Merkel's discs c. Ruffini endings d. Meissner's corpuscles e. dermatomes