Answer the following statement(s) true (T) or false (F)
1. the sodium-potassium pump is involved in establishing the resting membrane potential.
2. the nerve impulse is an electrical current that travels along dendrites or axons.
3. the sodium-potassium pump is involved in establishing the RMP
4. The voltage-gated potassium channels close before the membrane potential is brought back to its resting level.
5. receptors that bind the neurotransmitter at the postsynaptic cell membrane are voltage-gated.
1. True
2. True
3. True
4. False
5. False
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Some factors that help to stimulate the newborn's first breath are increasing CO2, decreasing pH, decreasing O2, decreasing body temperature, and mechanical stimulation.
Answer the following statement true (T) or false (F)
Matching
A) D B) C C) E D) A 6) Efferent vessels. 7) Cortex. 8) Medullary cord. 9) Trabecula. 10) Medulla.
Endocrine disruptors are environmental chemicals, which, if people and other animals are exposed, can have hormone-mimicking or hormone -blocking effects. These chemicals are used in industries and in homes and are associated with such commonly used products as pesticides and herbicides, plastic food containers and baby bottles. Those that mimic or block sex steroids are of special concern,
because they are present in household plastics and are fat-soluble, thus easily stored in fatty tissue of the body and can affect a developing fetus. Research is ongoing and results are controversial, but these chemicals have been associated with: What will be an ideal response?
Which structure in the fetus enables blood to bypass the lungs and pass directly from the right atrium to the left atrium?
A. Truncus arteriosus B. Foramen ovale C. Sinus venosus D. Bulbus cordis E. Ductus arteriosus