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Physiology 2

physiology

QuestionAnswer
When the kidney secretes hydrogen ions, it primarily reabsorbs _____ ions. sodium
A decrease in blood pH below normal tends to: stimulate increased respirations.
Which of the following is not true of enzymes? They accelerate chemical reactions. They change chemically and are in the end products of the reaction. They are vital to chemical reactions. Many contain vitamins in their structure. They change chemically and are in the end products of the reaction.
Which type of breathing is characterized by repeated sequences of deep gasps and apnea, and is usually seen in people with increased intracranial pressure? Biot’s breathing
During inspiration, the expansion of the lungs causes: a decrease in alveolar pressure.
The vagus is said to act as a “brake” on the heart. This situation is called vagal inhibition.
Which of the following is not true of a receptor potential? It follows the all-or-none law. It is a graded response. It occurs when an adequate stimulus acts on a receptor. It can stimulate an action potential in the axon of a sensory neuron. It follows the all-or-none law.
Which is not true of the hormone somatostatin? It is produced by the delta cells of the pancreas. It inhibits the secretion of glucagon. It stimulates the secretion of insulin. Both B and C are not true of the hormone somatostatin. It stimulates the secretion of insulin.
All of following are true statements except: 1st prostaglandin was identified in semen aspirin produces some of its effects by increasing PGE synthesis PGFs have been used to induce labor, accelerate the delivery of baby aspirin produces some of its effects by increasing PGE synthesis.
In comparison with the nervous system, the regulatory effects of the endocrine system are: slow to appear but long-lasting.
Which of the following is not a characteristic of the endocrine system? Chemical messenger travels a short distance. Effector tissues include virtually all tissues. Receptors are located on the plasma membrane or within the target cell. Chemical messenger travels a short distance.
When you are looking at a large green field, which cones would be sending the green wavelength to the brain? M
Which of the following statements is not true of the pineal gland? Melatonin is stimulated by the presence of sunlight.
Movement of hair cells in the organ of Corti against the _____ membrane can stimulate nerve impulse condition. tectorial
The production of thyroid hormone is stimulated by another hormone from the: anterior pituitary.
Which of the following is a correct statement? There are 5 lumbar nerve pairs.
Acetylcholine can stimulate _____ receptors. nicotinic
The parasympathetic and sympathetic divisions always act with a cooperative influence, and through summation of the impulses, the effect can be increased. TRUE / False False
Acetylcholine is in the same class of neurotransmitters as: serotonin. histamine. dopamine. none of the above. none of the above.
A slight shift away from the resting membrane potentials in a specific region of the plasma membrane is called a _____ potential. local
Within the nervous system, coding for the strength of a stimulus is accomplished through: the frequency of nerve impulses.
Which of the following is true of spatial summation? Neurotransmitters released simultaneously from several presynaptic knobs converge on one postsynaptic neuron.
Excitatory neurotransmitters are most likely to: initiate an action potential.
When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called: saltatory conduction.
During a relative refractory period: the action potential can be initiated with a strong stimulus.
The only ion(s) that can diffuse across a neuron’s membrane when the neuron is at rest is (are): potassium
Created by: Diana.smith
 

 



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