Which of these statements about homeostasis is true? a.The internal environment is maintained absolutely constant. b.Negative feedback mechanisms act to correct deviations from a normal range within the internal environment. c.Homeostasis is maintained by turning effectors on and off. d.All of these are true.

Blood flows in one direction through the heart as it contains valves that prevent backflow. This example best illustrates which aspect of the principle of complementarity of structure and function? a. function always reflects structureb. structure always reflects functionc. anatomy and physiology are inseparable d. a and ce. none of the above

Biting flies can transmit diseases and cause loss of blood for animals in nature. Horses have developed behaviors to repel biting flies such as ear twitching, head tossing, leg stomping, and tail swishing. Which statement best describes the interaction between body systems that allows horses to repel biting flies?

What physiological reaction happens to the body with the “fight or flight” response? Increase heart rate. Constricted pupils Decreased blood pressure D. Decreased heart rate

The reflex arc is the fastest way the body has to move a body part from danger or away from the source of pain. Have you ever noticed your own reflex response? Did you notice that you felt the pain after you yanked your hand away from the source of pain? Which is the sequence of structures involved in a reflex response? a. motor neurons → effectors → brain → sensory neurons → interneurons b. effectors → sensory neurons → brain → motor neurons c. sensory neurons → interneurons → motor neurons → effectors d. sensory neurons → motor neurons → interneurons → effectors

Choose all of the processes below that are related to the nervous system communications: (multiple select question) A. Chemicals transported in blood B. Quick initiation and conclusion of regulatory effect in the body C. Slow initiation, but long-term regulatory effect in the body D. Chemicals released at synapses. E. Directly regulates the metabolism of tissues and cells

With negative feedback, detection of a change brings about a response that_____ the change. a. reverses c. has no effect on b. accelerates d. mimics

You have to identify the following:1. The negative feedback condition/mechanism2. The four components of a negative feedbackloop:A. stimulusB. sensorC. control centerD. effector3. Explain what would happen to eachcomponent if a secretion became too great.

1. What is homeostasis? 2. Identify the components of a negative feedback mechanism. 3. When does positive feedback mechanism occur in the body? 6. Which of the following internal control systems is responsible in gathering information about the conditions inside and outside of the body? A. communicating system C. sensor B. control center D. thalamus 7. When there is an increase in the sugar level, negative feedback occurs in our body. What organ is responsible for releasing insulin to lower the sugar level? A. brain B. heart C. kidney D. pancreas 8. Which is the following is the best description of homeostasis? A. Maintenance of body function. B. Maintenance of body functions at the optimum level at all times. C. Keeping the body in balance D. Multiple systems working cooperatively to maintain body function within normal limits. 9. In which direction does an impulse travel along a neuron? A. from axon to axon C. from dendrite to axon B. from axon to dendrite D.…

Which of the following is involved in signaling/communication during cellular processes: Select one: a. myostatin receptor b. all of the above c. RAS d. acetylcholine e. calcium Clear my choice