The terminal web
is a site of exocytosis
The central nervous system (CNS) contains
There is no correct answer
Acetylcholine exocytosed
... [Show More] from the presynaptic cell travels to the postsynaptic cell to start the action potential in the postsynaptic cell
True
Potassium ions are at high concentrations inside of cells including in neurons
True
The receptors in post-synaptic cells are the basis on which the synapse can be defined as inhibitory or excitatory.
False
Voltage-gated ion channels open when a protein binds to the receptor
False
The membrane potential (resting potential) is largely set by the Na-K-ATPase pump.
True
Fast neurons as described in lecture require cytoplasmic signal transduction to open an ion channel.
False
The post-synaptic cell can be
in glands, muscle cells, neurons
Fast neurons as described in lecture are fast because they are surrounded by a type of glial cell that results in a myelin coating
False
The automatic nervous system contains the sympathetic and the parasympathetic nervous system
True
Excitatory synapses make the post-synaptic cell less likely to fire.
False
When the presynaptic cell contacts a muscle cell, the synapse area is called a motor end plate
True
Acetylcholine esterase breaks acetylcholine into muscarinic acid
False
Receptors are made from membrane-bound polyribosomes.
True
In the motor end plate, the event that is the immediate trigger for exocytosis is
Calcium ions
Excitatory synapses cause hyperpolarization of post-synaptic cells
False
The axon hillock in the pre-synaptic neuron fires based on temporal and spatial summation of inputs.
True
Only pre-synaptic neurons are coasted with myelin
False
Excitatory synapses cause depolarization of the post-synaptic cell
True
The neural tissues are
Spinal cord
Sensory neurons
Brain
The cell body referes to the part of the neurons that begin at the dendrites and extend to the axon terminal
False
The resting potential of neurons is
The answer is not on the list
The action potential is
A result of the movement of ions
The axon from a pre-synaptic cell contacts the axon of another neuron
False
The medulla of the adrenal fland produces epinephrine
True
The Parasympathetic Nervous System is triggered to act by exposure to epinephrine
False
Insulin in porduced by alpha cells
False
Vitamin D causes the parathyroid to inhibit new PTH synthesis
True
When the Sympathetic nervous system is triggered glycogen is broken down to glucose to provide more energy.
True
Insulin is a ligand
True
Vitamin D is really a hormone
True
Vitamin D is synthesized from cholesterol
True
The kidney filters about 180 liters of blood per day
True
The medulla of the kidney secretes epinephrine
False
Urine leaves our body through the urethra
True
Blood pressure drives red blood cells and plasma proteins out of the glomerulus
False
Toxins including urea is driven out of the glomerulus into the Bowmans capsule
True
The inter-weaving of the circulatory system with the nephron is essential for the concentration of urea in the urine
True
The Bowmans capsule, the proximal convoluted tubule, and the distal convoluted tubule are in the cortex of the kidney.
True
The Bowmans capsule is the beginning of the nephron.
True
Each kidney contains about one million nephrons
True
Efferent arterioles enter the Bowmans capsule and afferent arterioles leave the Bowmans capsule.
False
The kidney gets rid of toxic compounds
True
In the proximal convoluted tubule useful molecules are collected and brought back into the circulatory system such as glucose and amino acids, but not the toxic materials
True
The kidney controls the water balance in the body
True
The functional unit of the kidney is the nephron
True
Blood pressure is the force that drives molecules out of the glomerulus into the Bowmans capsule
True
Unlike other epithelia the epithelia that make up the capillaries have holes in them called fenestrations
True
The two circuits in the heart and the cardiovascular system have the same blood pressure
False
The excretory system uses oxygen because oxygen diffuses more rapidly into the excretory system because it contains water in the urine.
False
Red blood cells carry CO2 back to the lungs
False
The left ventricle of the heart contains more muscle
True
The partial pressure of oxygen in the lungs causes it to load into the circulatory system.
True
The lungs have increased surface area to increase the movement of oxygen into the circulatory system.
True
In capillaries the blood pressure pushes nutrients out of the capillaries towards the cells.
True
The oxygen in the circulatory system functions to bring oxygen to every cell of the body so it can make ATP
True
There is a reserve of oxygen in the muscles held by
myoglobin
The inspiratory and the expiratory reserves make up the total volume in the lungs
False
The pulmonary artery contains oxygenated blood
False
The slow flow of blood in the capillaries facillitates release of oxygen.
True
Nutrients and oxygen can leave the arteries and arterioles to reach the cells
False
In mammals ventilation is tidal
True
The artioventricular node fires after the sinoatrial node
True
Once inside the circulatory system ________ is the molecule that binds oxygen
hemoglobin
Blood move very rapidly in the capillaries
False
When the systole occurs the ventricle is contracting
True
To prevent back flow of blood in the heart there are _____________
valves
The slow flow of blood in the capillaries facillitates the production of bicarbonates in the blood
True
Surfactants is one of the later components made in the fetus (prior to birth)
True
When the ventricles contract blood is pushed out into the artery and the artery stretches because of its elastic layers allowing the blood to continue to flow into the circulatory system while the ventricle is relaxing.
True
Veins and venueles have valves in them, but arteries and arterioles do not
True [Show Less]