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Sodium and potassium play a key role in the generation of____?
A. hormones
B. New tissue
C. Nerve impulses
D. Ions
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- What is the function of the hormone erythropoietin? a. stimulates production of red blood cells b. stimulates muscle growth c. causes the fight-or-flight response d. causes testosterone productionWith negative feedback, detection of a change brings about a response that_____ the change. a. reverses c. has no effect on b. accelerates d. mimicsThe nervous system is like a communication system because _____. a neurons work in pairs to collect sensory information b the nephrons receive and transmit information c signals travel through neurons as electrical impulses d sensory neurons help muscles move by contracting and relaxing muscle cells
- A hormone differs from a neurotransmitter in thata. hormones act extracellularly, whereas neurotransmitters act withinthe cell that synthesized them.b. hormones are released only by neurons, whereas neurotransmittersare released by many different types of cells.c. hormones cause only fast responses (seconds or less) to stimuli,whereas neurotransmitters cause slow responses (minutes to hours)to stimuli.d. hormones affect only epithelial cells, whereas neurotransmittersaffect only muscle cells.e. hormones are released into the bloodstream and can activate manycells in many parts of the body, whereas neurotransmitters arereleased by neurons and affect adjacent cells.Which of these homeostatic mechanisms in the body are examplesof positive feedback, and which are examples of negative feedback?Why?a. The adrenal glands produce epinephrine in response to a hormone produced by the pituitary gland in times of stress; the pituitary gland senses the epinephrine in the blood and stopsproducing the hormone.b. As the bladder fills with urine, pressure sensors send messagesto the brain with increasing frequency, signaling that the bladdermust be emptied. The more the bladder fills, the more messagesare sent.c. When you drink an excess of water, specialized cells in yourbrain, as well as stretch receptors in your heart, detect theincrease in blood volume. Both signals are transmitted to thekidneys, which increase the production of urine.Which of the following statementsabout hormones and nerve impulses isaccurate?O A. Hormones and nerve impulses bothcarry messages throughout the body, buthormones work more slowly.O B. Hormones and nerve impulses bothcarry messages in the body, but hormonesonly work on cells very near where thehormones are made.O C. Hormones and nerve impulses bothcarry messages in the body using electricalsignals.O D. Hormones and nerve impulses bothcarry messages throughout the body, buthormones work more quickly
- which of the following scenarios can be classified as a negative feedback loop? a. increase in oxytocin caused by increased contractions b. increase in blood pressure to reduce heart rate c. increase in testosterone to help increase a fight or flight response d. increase in platelet production to help increase blood clottingMatch the methods of functionality for the nervous system and endrocrine system. uses an electrical signal to trigger a respnse 1. nervous uses a chemical messager to trigger a response 2. endrocrineWhen faced with a sudden drop in environmental temperature, an endothermic animal will ________.a. experience a drop in its body temperatureb. wait to see if it goes lowerc. increase muscle activity to generate heatd. add fur or fat to increase insulation
- What could you correctly say about the Bundle of His? a. Changes in its rhythm of firing would be classified as dromotropic effects b. Cells within it rely on calcium-induced calcium release c. Cells within it would participate in inotropic effects d. Cells within it make forceInsulin is a kind of _____.A. Hormone B. Protein C. Enzyme D. VitaminAthletes may take synthetic EPO to boost their________.a. blood calcium levelsb. secretion of growth hormonec. blood oxygen levelsd. muscle mass