a.
To determine: Whether glucagon secretion in response to declining blood glucose is positive or negative feedback.
Introduction: Glucagon is a peptide hormone released by the pancreas in response to the blood glucose level. The change in the blood glucose level of the human body is maintained by glucagon.
b.
To determine: Whether increasing milk release and secretion in response to baby’s suckling is positive or negative feedback.
Introduction: Oxytocin hormone is mainly responsible for the ejection of milk after parturition.
c.
To determine: Whether urgency in emptying one’s urinary bladder is positive or negative feedback.
Introduction: Micturition reflex is mainly responsible for urination in humans. The urination is controlled voluntarily in case of adults.
d.
To determine: Whether sweating in a response to rising body temperature is positive or negative feedback.
Introduction: Sweating helps the body to maintain the internal temperature of humans in summer.
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Human Physiology: An Integrated Approach (8th Edition)
- How do the functions of the HPA axis compare to those of the sympathetic nervous system?A. The sympathetic nervous system readies the body for brief, vigorous action, and the HPA axis controls digestion and other vegetative activities.B. The sympathetic nervous system activates the brain, and the HPA axis activates the rest of the body.C. The sympathetic nervous system readies the body for brief, vigorous action, and the HPA axis prepares the body for prolonged coping with a persistent stressor.D. The sympathetic nervous system is active during a stressful situation, and the HPA axis becomes active at the end of the stressful situation.arrow_forwardThe hypothalamus contains the feeding and thirst control center. A. True B. Falsearrow_forwardWhich of the following responses is an effector activated by the hypothalamus when the body temperature is lower than the set point? a. skeletal muscles contract b. sweat glands initiate sweating c. skin blood vessels dilate d. move to a warmer location or put on a sweaterarrow_forward
- Which of the following rows describes the change in heart rate, blood flow to skin, and glucose storage that would be expected to occur immediately following stimulation of the parasympathetic nervous system? Select one: a. Heart Rate Blood Flow to Skin Glucose Storage Increased Increased Decreased b. Heart Rate Blood Flow to Skin Glucose Storage Decreased Decreased Increased c. Heart Rate Blood Flow to Skin Glucose Storage Decreased Decreased Decreased d. Heart Rate Blood Flow to Skin Glucose Storage Increased Increased Increasedarrow_forwardA person who is hemorrhaging (losing lots of blood) may experience which of the following symptoms based on the secretion of antidiuretic hormone? a. Increased body temperature b. Increased salivation c. absence of sweating d. Frequent urinationarrow_forwardWhich of the following physiologlcal responses is an example of positive feedback? . The body's production of red blood cells, which transport oxygen from the lungs to other organs, is stimulated by low concentrations of oxygen. b. A high concentration of glucose in the blood causes deeper, more rapid breathing, which expels carbon dioxide. C. Pressure of the baby's head near the opening of the uterus stimulates uterine contractions which cause greater pressure against the uterine opening. d. Heightened body temperature induces sweating which disposes of metabolic heat and cools the body.arrow_forward
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- Sweating is an example of variable. It is also an example of negative feedback mechanism. a. Both statements are true b. Both statements are false c. First is true, Second is false d. First is false, Second is truearrow_forwardNorepinephrine increases: A. respiration B. urine production C. saliva production D. blood pressurearrow_forwardMark the following statements as true or false. If a statement is false, correct it to make a true statement. a. Potassium ions are responsible for the repolarization phase of the action potential. b. Insulin, aldosterone, and epinephrine stimulate the uptake of potassium ions into cells. c. Hyperkalemia tends to decrease the resting membrane potential and hyperpolarize excitable cells. d. Hypocalcemia causes neurons to become hyperexcitable, leading to potential tetanic contractions. e. Chloride ions are generally reabsorbed from the kidneys, along with bicarbonate ions.arrow_forward
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