When the ions move across the cell membrane, an electrical potential change results. As you are probably aware, nerves trigger muscle movement. When you place your finger on a sharp object (such as a tack), you quickly draw your hand away and develop a sensation of pain. Which types of channels are operating under these conditions to allow nerve conduction and subsequent muscle movement?
What will be an ideal response?
Mechanically gated (in sensory cell receptor potentials), voltage-gated (in nerve and muscle action potentials), and chemically gated (in neuromuscular synaptic transmission).
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Where in the figure is spongy bone located?
a) A b) B c) E d) F e) G
Sweating is the only mechanism for heat loss when body temperature is the same as environmental temperature
Indicate whether the statement is true or false
Compounds classified as ________ alter synaptic transmission by changing neurotransmitter receptor numbers or affecting the breakdown and/or removal of neurotransmitter.
A. neurohormones B. neuromodulators C. excitatory neurotransmitters D. inhibitory neurotransmitters
When stretch receptors in the cervix are stimulated by the continually increasing pressure of the fetus, afferent neurons send impulses to the maternal hypothalamus resulting in
A. increased estrogen production. B. increased oxytocin production. C. increased fetal CRH production. D. increased growth in the size of the placenta. E. decreased oxytocin production.