Test answers
Bilirubin
Metabolite of hemoglobin that imparts the yellowish tinge found in plasma and the skin if a person has jaundice
Macrophages
Foreign materials are filtered out of the lymphatic system by
False
TOF: CO2 causes the relaxation of metarteriole sphincters
fibrin
What molecule forms the meshwork in a blood clot
Ventricles
Chambers in the brain that contain CSF
True
Lipophilic hormone may be temporarily stored in adipose tissue
False
The end plate potential does not always depolarize the muscle cell to the threshold value required to initiate an action potential
Arterioles
Resistance to blood flow is regulated by which blood vessels?
ganglion
A ________ is a cluster of cell bodies in the peripheral nervous system
von Willebrand factor
Formation of a platelet plug is initiated by _____
bone marrow
Hematopoietic stem cells are found in:
Chloride
The opening of ________ channels decreases the likelihood of an action potentials?
False
Synaptic delay is due to the time it takes for neurotransmitters to diffuse across the synaptic cleft
Refractory
The ____________ period is reduced membrane excitability after an action potential
True
The lymphatic system is an open circulatory system
True
The posterior pituitary is comprised of axon terminals from the hypothalamus
-55
Threshold for action potential in a neuron is _____ mV
Pacinian corpuscle
Which of the following is not a cell type found in the retina?
-70
Typical resting membrane potential for a neuron is ________ mV
Medullary osmotic gradient
Urea is responsible for regulation:
False
Taste receptor cells are only located on the tongue
Astrocytes
What type of glial cell is necessary for normal development of the blood-brain barrier?
blood pressure
Which of the following factors do not contribute to vascular resistance?
False
Mechanoreceptor fields are largest at the most sensitive areas such as the lips and hands
Acetylcholine
Neurotransmitter released from motor neurons
Right frontal lobe
A brain tumor patient has a problem with moving her left arm. Where might you expect this brain tumor to be located?
False
TOF: A decrease in blood pressure within an arteriole will initiate a myogenic vasoconstriction response to maintain a constant rate of blood flow
True
TOF: Release of ADP by platelets is part of a positive feedback loop to increase platelet stickiness and aggregation
False
TOF: The opening and closure of the atrioventricular and semilunar valves is driven by the contraction of papillary muscles
ampulla cupula
Located within the ________ of the semicircular canal, a gelatinous structure called the _________ surrounds the cell
Coronary arteries
Blood supply to the heart comes from
high
Veins function as volume reservoirs due to their ________ compliance
False
Voltage-gated channels are most abundant at the dendrites of a postsynaptic cell
ADH
What hormone does not contribute to smooth muscle vasodilation in arterioles?
Vascular spasm
What is the first step of hemostasis
Pain
What is the stimulus for nociceptors?
Commissures
What is the term for the bundles of axons that connect the left and right side of the brain?
Megakaryocytes
What type of cell is the precursor for platelets?
Oligodendrocyte
What type of cells form a myelin sheath around axons in the CNS?
True
Coding for stimulus intensity is signaled by AP frequency
Adrenal medulla
A patient has symptoms of high blood pressure, elevated heart rate, due to excess epinephrine via tumor. Where would this tumor be located?
vasodilation
Nitric oxide causes _____________