Mastering A&P Reading questions
Which of the following is NOT one of the basic functions of the nervous system?
integration of sensory input
control the activity of muscles and glands
regulation of neurogenesis
monitor changes occurring both inside and outside the body
Which of the following allows us to consciously control our skeletal muscles?
What part of the nervous system performs information processing and integration?
Which of the following types of glial cells monitors the health of neurons, and can transform into a special type of macrophage to protect endangered neurons?
Which of the following types of glial cells produces the myelin sheaths that insulate axons, or nerve fibers, in the central nervous system (CNS)?
Which of the following peripheral nervous system (PNS) neuroglia form the myelin sheaths around larger nerve fibers in the PNS?
Which of the following is true of axons?
Axons use chemically gated ion channels to generate graded
A neuron can have only one axon, but the axon may have occasional branches along its length.
Smaller (thinner) axons are more likely to bear myelin sheaths than larger (thicker) axons.
Neurons can have multiple axons but only one dendrite.
Which of the following is NOT true of association neurons?
Association neurons account for over 99% of the neurons in the body.
Association neurons are also known as interneurons.
Most association neurons are confined within the peripheral nervous system (PNS).
Most association neurons are multipolar
Unmyelinated fibers conduct impulses faster than myelinated fibers.
True or False
Which of the following types of neurons carry impulses away from the central nervous system (CNS)?
Which of the following is NOT a difference between graded potentials and action potentials?
Spatial summation is used to increase the amplitude of a graded potential; temporal summation is used to increase the amplitude of an action potential.
Graded potentials can result from the opening of chemically gated channels; action potentials require the opening of voltage-gated channels.
Graded potentials occur along dendrites, whereas action potentials occur along axons.
Greater stimulus intensity results in larger graded potentials, but not larger action potentials.
Which of the following is a factor that determines the rate of impulse propagation, or conduction velocity, along an axon?
The sodium-potassium pump ejects two Na+ from the cell and then transports three K+ back into the cell in order to maintain the concentration gradients for sodium and potassium.
The __________ is due to the difference in K+ and Na+ concentrations on either side of the plasma membrane, and the difference in permeability of the membrane to these ions.
What type of stimulus is required for an action potential to be generated?
Which membrane potential occurs because of the influx of Na+ through chemically gated channels in the receptive region of a neuron?
Which of the following is NOT one of the chemical classes into which neurotransmitters fall?
Which of the following is NOT a type of circuit?
Which of the following circuit types is involved in the control of rhythmic activities such as the sleep-wake cycle, breathing, and certain motor activities (such as arm swinging when walking)?