Pick the true statement about nervous control versus hormonal control of our org
ID: 97753 • Letter: P
Question
Pick the true statement about nervous control versus hormonal control of our organs a. In most instances, the tissue responses to endocrine input are slower compared to the responses to neuronal input. b. The nervous system may be involved in homeostasis, but the endocrine system is not. c. The brain only uses neuronal signaling. d. Target tissues only have receptors to hormones, but not to signal factors released by neurons e. TWO of the above are CORRECT answers to this question What is a feature of the posterior pituitary? a. The posterior pituitary produces 6 hormones b. One of the posterior pituitary hormones stimulates thirst c. Embryologically speaking, the posterior pituitary arises from tissue that formed the roof of the mouth d. The posterior pituitary is a peripheral endocrine gland e. Hypothalamic releasing and inhibiting hormones regulate posterior pituitary hormones What happens when the membrane reaches the threshold potential? a. This is the signal that triggers voltage-gated sodium and potassium channels to open. b. It just precedes the rising phase of the action potential c. Leak channels close d. A and B e. All of the above Regarding the Na+ - K+ pump, _____ causes the pump to change conformation so that the bound sodium ions are exposed to the extracellular environment. Once this happens _____ a. Release of the bound phosphate group//the bonding affinity for sodium decreases b. The release of sodium//phosphorylation of the pump occurs c. The release of potassium ions//the binding affinity for sodium increases d. Phosphorylation//the binding affinity for sodium decreases Graded potentials engage in _____, which action potentials engage in _____ a. Passive conduction/salutatory conduction b. Active conduction/Passive conduction c. Contiguous conduction/passive conduction d. Passive conduction/contiguous e. A and DExplanation / Answer
11. Option a is correct. The tissue responses to endocrine inputs are slower but long lasting. homeostatis is a kind of adaptation aginst change in environmental condition and maintained by both endocrine and nervous system. brain uses both type of signaling as hypothalamus a part of brain respond to pituitary gland secretion. Tissues contain receptors for both endocrine and nervous input.
12. Option b is correct. Posterior pituitary secrets two hormones ADH and oxytocin. ADH (vasopressin) stimulates thirst.
13. Option d is correct. When membrane potential reaches to threshold potential, voltage gated sodium and potassium channel open and further entry of ions proceed to rising potential.
14. Option d is correct. Sodium - potassium pump is regulated by ATP which phosphorylate the pump due to which conformation changing occurs which pump sodium to the extracelluar medium. Once this happens the binding affinity for sodium to the pump decreases.
15. Option d is correct. Graded potential spread by a process known as passive flow which action potential engage in contiguous conduction.