all 2016 Directions: Read each description/definition carefully and select the a

Question

all 2016 Directions: Read each description/definition carefully and select the answer option that best fits. Darken the letter on the Apperson sheet that corresponds with the answer you selected. Answers can be used once, more than once or not at all. Just select the one that best applies for each question. PLEASE ANSWER EVERY QUESTION IN THIS SECTION- EVEN IF YOU HAVE TO MAKE AN EDUCATED GUESS! Homeostasis & Feedback Loops 1. Detection of changes in the physiological environment is job of this step in a a) Afferent pathway feedback loop. During the spreading of a neuron's action potential, the influx of sodium stimulates the opening of channels that allow more sodium to enter. This is an example of a (positive or negative) feedback loop. During the stress response, this autonomic pathway will be activated In a feedback loop, if an increase in blood pressure is the stimulus, the conducting cells of the sinoatrial node would be a/an This type of neuron is used to send a signal to skeletal muscle cells. b) Effector c) Efferent pathway 2. e) Negative ab) Response ac) Parasympathetic ad) Positive ae) Sensor bc) Somatic motor 3. 4. 8 5. 6. In a feedback loop resulting from the detection of high blood osmolarity 7. In a feedback loop, if an increase in temperature is the stimulus a decrease in bd) Stimulus 8. In systemic (whole-body) feedback loops, sensory neurons typically represent 9. The medulla oblongata, hypothalamus, and pituitary are examples of this step 10. When a particular physiological change occurs in the body, the structure thot 5 vasopressin will be this step temperature would be the be) Sympathetic this step of the feedback loop can act to adjust the system is called the_in a feedback loop

Explanation / Answer

1. the correct option is Sensors: This are actually receptors which detects any changes in the body, for example thermoreceptors which detects the change in the body temperature.

2. Positive feedback loop: A stimulus causes the response to repeat the stimulus. Sodium gate are open due to the action potential and as result all other gates are forced to open down the neuron.

3. Sympathetic pathway.

The hormone adrenaline is secreted by adrenal medulla, which get the body ready for flight or fight response. Adrenaline leads to the arousal of sympathetic nervous system.

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