Which of the following is an example of a normal physiologic process that uses a positive feedback loop? a. blood pressure regulation b. childbirth C. regulation of fluid balance d. temperature regulation

What is meant by the experimental ablation method of studying the brain? a. The approach in which identical experiments are conducted on numerous animals simultaneously b. The approach in which experiments are conducted on animal species to understand the function of the human brain c. The approach in which the brain is preserved with fixatives such as formaldehyde, sliced thin, and then studied with a microscope Od. The approach in which parts of the brain are systematically destroyed to determine their function

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

which of the following cell types contain ATP- dependent K+ channels and voltage-gated Ca++ channels a. alpha cells of the pancreas  b. fat cells c. liver cells d. beta cells of the pancreas e. muscle cells

How does the semi-permeable nature of the cell membrane maintain homeostasis ?  A. By providing two-way traffic for nutrients and waste needed to maintain metabolism. B. By creating a barrier which allows excitable cells to propagate action potentials . C. By preventing steroid hormones from entering the cell easily. D. A and B

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

If an autoimmune disorder targets the alpha cells,production of which hormone would be directly affected?a. somatostatinb. pancreatic polypeptidec. insulind. glucagon

Draw a structure of a long bone and label its part

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.

Multiple sclerosis is a demyelinating disease, in which the patient’s immune system attacks and destroys the cells that form the myelin sheath in the central nervous system. Which cell would be responsible? Would Schwann cells or oligodendrocytes, both or none of them be affected?   a. Schwann cell   b. Oligodendrocytes   c. Both Schwann cells and Oligodendrocytes   d. None of the above