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Study Guide Phys.

QuestionAnswer
Which is true of an action potential? The outside of the plasma membrane is negatively charged, and the inside is positively charged.
Neurotransmitters are released in a synapse and bind to: receptors on the postsynaptic neuron.
The only ion(s) that can diffuse across a neuron’s membrane when the neuron is at rest is (are): potassium.
The fastest nerve fibers in the body can conduct an impulse that is how much faster than the slowest fibers in the body? Almost 300 times faster
Which of the following antidepressants acts by blocking the action of monoamine oxidase (MAO)? Phenelzine
The vomiting reflex is mediated by the: cerebellum.
If the ventral nerve root of a spinal nerve were destroyed, a person would lose _____ related to that pathway. sensory perception
Sympathetic responses generally have widespread effects on the body because: preganglionic fibers are short and postganglionic fibers are long.
Which is not true of the hormone somatostatin? It stimulates the secretion of insulin.
The receptors responsible for sensing crude and persistent touch are the: Ruffini corpuscles.
When you are looking at a large green field, which cones would be sending the green wavelength to the brain? M
A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is erythropoietin.
The mechanisms of which three hormones work together to regulate blood volume? aldosterone, ANH, and ADH
A hematocrit of 56% would be an indication of: polycythemia.
The _____ postulates that when an antigen enters the body, it selects the clone whose cells are committed to synthesizing its specific antibody and stimulates these cells to proliferate and to thereby produce more antibodies. clonal selection theory
The movement of phagocytes from blood vessels to an inflammation site is called diapedesis.
The PCO2 in the atmosphere is: greater than arterial blood.
Standard atmospheric pressure is _____ mm Hg. 760
Which muscles are used for forced expiration? Abdominal muscles and internal intercostals
Which step of deglutition is under voluntary control? Oral stage
The hormone thought to be a messenger causing release of digestive enzymes from the intestinal mucosa is: vasoactive intestinal peptide.
Which of the processes of mechanical digestion involves the esophagus? Deglutition, Peristalsis
The purpose of peristalsis is to: propel food forward along the GI tract.
Which phase(s) of gastric secretion is(are) stimulated by the sight, taste, and smell of food? Cephalic phase
When classified according to the kind of chemical reactions catalyzed, digestive enzymes are referred to as _____ enzymes. hydrolyzing
Created by: Taysue
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