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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Chapter 6 Solutions
HUMAN PHYSIOLOGY: AN INTEG ACCESS C
- The hypothalamus contains the feeding and thirst control center. A. True B. Falsearrow_forwardHow 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_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
- A 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_forwardWhich branch of the peripheral nervous system is though to underlie the body's "rest and digest" response (e.g., decreased heart rate when you are in a safe situation)? Choose the most specific answer. a. adrenal branch b. parasympathetic branch c. sympathetic branch d. autonomic brancharrow_forward
- A nursing mother who has an alcoholic drink will secrete alcohol into her milk for two to three hours afterward. Alcohol also decreases her oxytocin production. What effect will the decreased oxytocin have on the woman’s ability to nurse her infant?arrow_forwardSweating 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_forwardNervous control in the GI tract involved with long reflexes and CNS centers are which typre of controls? a. intrinsic b. extrinsicarrow_forward
- The type of thirst that occurs after eating salty food is called: a. osmotic thirst. b. dehydration thirst c. barosensitive thirst d. hypovolemic thirst The branch of the autonomic nervous system that is responsible for preparing the body for “fight or flight” behaviors is called the: a. sympathetic nervous system. b. somatic nervous system. c. parasympathetic nervous system. d. craniosacral nervous system. The enhancement of contrast at the edge of an object is the result of: a. fatigue of the rods and cones b. the diffraction of light from the edge's surface c. lateral inhibition in the retina d. the color of the objectarrow_forwardWhat is the best diagnostic test to determine if the gland described in question 1 is not functioning normally? a. measuring the amount of radioactive iodine taken up by the thyroid b. doing body temperature scans every morning and evening at the same time c. watching weight fluctuation over a 1-month time period d. taking a blood sample to measure the amount of thyroid hormone (T3 and T4) presentarrow_forwardNorepinephrine increases: A. respiration B. urine production C. saliva production D. blood pressurearrow_forward
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