Define sensory adaptation and describe how it occurs in a Pacinian corpuscle
What will be an ideal response?
Sensory adaptation refers to the diminished extent of depolarization in a receptor despite sustained stimulation. When pressure is first applied to the Pacinian corpuscle, the receptor responds with a magnitude that reflects the intensity of the stimulus. As the pressure continues, the energy is dissipated due to the slipping of the receptors layers. This slipping of layers causes the effect to be filtered out and the neuron no long responds with a receptor potential.
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Answer the following statements true (T) or false (F)
1. Smooth, striated, and cardiac are examples of muscle tissues. 2. An important part of muscle tissue is the matrix found in between cells. 3. Both neurons and glia cells make up nervous tissue. 4. Areolar, blood, bone, and cartilage are all examples of connective tissue. 5. The human body consists of about 25 billion cells.
In the nephron loop
A) the filtrate in the descending limb becomes more and more hypertonic due to the loss of water. B) interstitial fluid around the nephron loop has four times the solute concentration as blood plasma. C) sodium ions are actively transported out of the ascending limb. D) water moves by osmosis out of the descending limb. E) All of the answers are correct.
Oxytocin stimulates the kidneys to conserve water.
Answer the following statement true (T) or false (F)
What happens to the heme when hemoglobin is broken down by the liver and spleen?
A. It is broken down to form iron. B. It is secreted into bile. C. It is broken down to iron and bilirubin. D. It is considered a waste product and removed from the body.