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Week 14 Assignement
Question | Answer |
---|---|
Neurons are the only living cells that maintain a difference in the concentration of ions across their membranes | False |
If the threshold potential is surpassed, the full peak of the action potential is always reached. | True |
When a neuron is resting, the inner surface of its plasma membrane is slightly positive compared with its outer surface. | False |
An ion channel that opens in response to a sensory stimulus is a(n) | Stimulus- gated channel |
Many cerebral functions have typical locations. This fact is known as | Cerebral localization |
The somatic motor system includes all the _____ motor pathways _____ the CNS. | Voluntary; outside |
Both sympathetic and parasympathetic divisions are tonically active, which means they | continually conduct impulses to autonomic effectors. |
A reflex consists of either a muscle contraction or a | glandular secretion. |
The receptors responsible for sensing crude and persistent touch are the: | Ruffini Corpuscles |
If you slammed your finger in a car door, it would stimulate _____ pain fibers. | acute |
One of the few hormones that functions on a positive-feedback loop is: | oxytocin |
Visceroceptors are located in which of the following? | internal organs |
Platelets play an important role in | blood clotting |
Erythrocytes begin their maturation sequence in red bone marrow from nucleated cells known as: | hematopoietic stem cells |
Which are the two baroreceptors that are located near the heart? | aortic baroreceptors and carotid baroreceptors |
The ingestion and destruction of microorganisms or other small particles is called | phagocytosis |
Complement can best be described as a(n): | enzyme in blood. |